ERMOLOVICH E.A., KIRILOV A.N., ERMOLOVICH O.V.
DIRECTIONAL CHANGES IN THE PROPERTIES OF HARDENING FILLING MASS THROUGH THE APPLICATION OF NATURAL FIBER MATERIAL
A method of hardening of filling mass that includes placing in the formed mass of reinforcing elements along with hardening mixtures is proposed, and chrysotile asbestos are used as reinforcing elements. Relative changes in the strength characteristics from asbestos contents are extreme in nature and are well approximated by polynomial functions of the second and third orders. Reliability of approximation is 0,958—0,995. Analysis of the data shows that an increase in the compressive strength of the mass (25—30 %) and flexural strength (26—32 %) is observed when a 3—6 % by weight of the binder of chrysotile asbestos are introduced. However, it is founded that the content of asbestos fibers over 3 % preclude transporting through pipes of filling mixture and its spreading in the chamber. Three percent concentration of the fiber from the binder weight (or 0,422 % by all weight) is optimal and is recommended for use. Evaluation of tensile strength of the samples according to the method of splitting showed that the introduction of the 3 % asbestos increases it by 35 %, while reducing the relative deformation of shrinkage of about 2 times.
Key words: management of geomechanical processes, hardening filling mass, asbestos- chrysotile fibers, the strength characteristics, shrinkage deformation.
ZUBOV V.P., CAO QUOC VIET
PRACTICAL EXPERIENCE ON USING MINING SYSTEMS OF THICKNESS AND SLOPPINESS COALSEAMS UNDER COAL-BASIN QUANG NINH
The analysis of results of thick steep coal seams extraction practical experience in conditions of Quang Ninh (Vietnam) coal basin deposits.
It is found that the most negative impact of underground mining on the land surface is observed when the main roof is represented by rocks which are able to hang in the goaf in large areas. The variant of mining method of thick steep coal seams under surface constructions is suggested. The suggested variant includes sharing of a coal seam into inclined slices mined upwards and the extraction of each slice by cross-pitch stripes with the filling of mined out space.
Key words: coal, sloppiness coalseam, mining systems on the surface.
ZUBOV V.P., KOVASLKY E.R., CAO QUOC VIET
FINITE-ELEMENT ANALYSIS OF STRATA MOVEMENT DUE TO MINING OF COAL SEAM
Approach to estimation of influence of mining works on undermined ground surface based on finite-element analysis is proposed. Some model parameters are shown and necessary assumptions are described. Mathematical relationship between shrinkage ratio of filling mass and maximal subsidence of surface is obtained.
Key words: strata movement, subsidence, finite-element method, shrinkage ratio, coal seam, mining method.
KONDRATENKO V.E., DEVYATYAROVA V.V.
CALCULATION OF THE STRENGTH OF TEMPORARY ARCH SUPPORT TUNNEL
The paper presents the methodology for calculating the strength of the temporary sectional lining of the tunnel. To determine the internal force factors arising in the lining under the influence of vertical and lateral pressure of rocks used method forces.
Key words: temporary support, frame, strength, technique forces.
RESOURCE-SAVING TECHNOLOGIES IN THE DEVELOPMENT OF ORE DEPOSITS USING GOAF
The proposed technological scheme, providing economic effect in the application of internal dumping in deep open pit mines is a complex Glubokoe scheme based on Glubokoe the development system sequential formation of an internal blade sloping tiers of decreasing height and subsequent placement of overburden in the lower horizons on the previously formed dumping tiers in the form of the blade of the second stage. The effectiveness and scope of internal dumping in the development of deep-seated ore deposits limited length can be significantly increased by further adaptation of the methods and parameters of opening and development systems to the cramped conditions of the career space.
Key words: internal dumping, Glubokaya system, ore deposits, mining space.
TKACHEV V.A., PROZOROVA YU.A.
RESEARCH INTO INFLUENCE OF TUPE OF SUPPORT AND METHODS OF PROTECTION OF SUPPORT AND METHODS OF PROTECTION OF DEVELOPMENT FACES UPON STRESSEDLY-DEFORMED CONDITION OF BEARING ROCK
Analysis of techniques in operation and equipment of supporting development faces is given. Investigation of influence of tupe of supporting and protecting techniques on intensity of stress in face roof is adduced. Equation of relation between intensity of stress in face roof and safety pillar width is produced. The most effective parameters of mine workings support and protection are revealed
Key words: intensity of stress, protection of mining workings, safety pillar, tub of wooden-concrete blocks, massif, area of non-elastic deformation, development face.
GRIGORYEV S.N., MORGUNOV I.V.
RATIONALE FOR THE MOST EFFECTIVE COURSE OF MINING OPERATIONS AT IMPROVEMENT OF MEDIUM-SIZED MOULDS
The paper considers the method of working the mould deposits by forming a temporary supply side. The main advantages of mining development stages in the development of mould fields are shown, reviewed and analyzed on the example of a model mould. The recommendations on for the most effective course ofmining operations of mould deposits of medium size are given.
Key words: mould deposits, momentous development, the model of a mould, the temporary Board, angled layers, horizontal layers.
INFLUENCE OF ADDITIVES FROM WOOD OF A PEAT DEPOSIT ON PROCESSES OF FORMATION OF STRUCTURE IN FORMED PEAT PRODUCTION
Binding fibrous additives from wood inclusions of a peat deposit sushchestvenno influence physico-mechanical properties and qualitative characteristics to a floorchaemoj of formed production on their basis. Initial raw materials, a percentage parity of components of a mix are investigated for the purpose of studying of the mechanism of change strukturoobrazovanija formed production and its physico-mechanical properties.
Key words: physicomechanical properties, fibrous weight, peat, the qualitative characteristics, percentage parity of components, structurization.
STRATEGY OF EFFICIENT CONTROL OVER OPEN-PIT MINERAL MINING AND HANDLING EQUIPMENT USING DYNAMIC INFORMATION SYSTEMS
The author formulates principles of control strategy for open-pit mineral mining and handling equipment in Russia aimed to ensure dynamic improvement in mine productivity owing to real-time automated production control based on extraterrestrial navigation and radiocommunication systems and application programming.
Key words: mining and transport equipment, management strategy, mines, cuts, ACS dispatch, information technology.
KOVALEV O.V., KHOANG D.N.
MEASURES FOR EXPLOITATION SLOPE COAL SEAMS UNDER OPEN PIT MINE IN CONDITIONS OF THE NUMBEO MINING IN VIETNAM
The article presents calculation method for some factors for safe underground mining of coal reserves located under water objects. Besides determination safe depth of mining in the geological conditions of the Nuibeo mining in Vietnam is done.
ECOLOGICAL AND TECHNOLOGICAL PROSPECTS FOR MINING SMALL PRIMARY DEPOSITS
The article considers the current question on finding new technologies for efficient mining of deposits with insufficient reserves for profitable application of traditional mining methods. There are plenty of such deposits, and they may make the main mineral and raw material supply base in the long term. Under such conditions, it is suggested to apply a fundamentally new approach based on introduction of additional stage in the process of geotechnical preparation. The geotechnical preparation principles were published earlier. Large-scale exploitation of small deposits poses a threat to the natural environment, which emphasizes the ecological safety issues. The author reviews ecological aspects of new technologies. In particular, the principle of ecological equivalence for short depletion periods of fields. The technological ways of reducing environmental pressure and enhancing efficiency of mining small deposits are described.
Key words: small primary deposits, mineral resources, ecological problems, geotechnical preparation of deposits, directional geological process.
HOLODNYAKOV D.G., LOGINOV E.V.
MODE CONTROL OF MINING OPERATIONS AND THE ANGLE OF REPOSE OF THE WORKING PIT
The article suggests a method of controlling the mode of mining operations on the high angled deposits by changing the angle of the high wall. The averaging method productivity rock in the development of depth horizons is to increase the angle of the high wall. This averaging method productivity achieves the minimum value coefficient of variation stripping operations, stabilize mode of mining operations, as well as allows you to engineering the position of mining operations at various stages of mining.
Key words: open-pit boundary, stripping soils, mode of mining operations, angle of the high wall.
ENRICHMENT OF MINERALS
KHARLAMOVA T.A., ALAFEDOV A.F., BAKHIR V.M.
ELECTROCHEMICAL ACTIVATION IN TECHNOLOGY OF ENRICHMENT UND RECYCLING ORES, SECOND RESOURSES AND WATER PURIFICATION
Using of products of electrolyze of chloride solution in enrichment processes is a perspective way of development of electrochemical technologies. Authors observe production which is made on the basis of flow modular electrochemical reactors by Russian research and Production Company called «Delfin Aqua» for the purpose of improvement and getting of real possibility of using of new electrochemical technologies.
Aquachlor and Ecochlor equipment allows to get gaseous chlorine, gaseous mixture of oxidants, solution of oxidants, solution of hypochlorite and potassium, solution of sodium hydroxide from sodium chloride at the place of using. Ecochlor and Oxytron-K system is a new decision which can produce muriatic acid and solution of sodium hydroxide from sodium chloride. Maximum capacity for 36 % muriatic acid is 180 tons per month. With using of Oxytron-K device muriatic acid production from chlorine and hydrogen is not energy demanding. It demands less than 3 thousand kW to produce 1 ton of hydrogen chloride. The basic scheme of Oxytron-K which is used for producing of solution of muriatic acid from chlorine and hydrogen and water is given.
Oxytron-K is made for realization of process of hydro chlorination with solution of muriatic acid and gaseous chlorine.
Combined using of Ecochlor for producing of gaseous chlorine from solution of sodium chloride, Oxytron-K for synthesis of muriatic acid from gaseous chlorine and hydrogen and Oxytron-M for synthesis of electrochemical activated solution of chlorine rich muriatic acid with using of chlorine residue for reuse as a solution of muriatic acid with using of Oxytron-K provides eco-friendly technology of leacing noble and rare metals from ores, slugs and clumb banks of mining and concentration plans and mining and chemical combines.
Chlorine capacity of highly pointed equipment is from 10 to 10000 kg/h. Technology provides high effectiveness of process of hydrochloride leaching noble and rare metals from ores and secondary raw materials. Target component degree of extraction achieves 90—99 %, process is closed technically, it doesn’t produce toxic and hazardous waste, and it demands only water for, sodium chloride and electricity.
Key words: enrichment, electrochemical activation, ecology, hydrochlorination.
MEASURING, CONTROL, DIAGNOSTICS
KOPYLOV K.N., SMIRNOV O.V., KULIK A.I.
ACOUSTIC MONITORING OF THE CONDITION OF ROCK MASS AND FORECAST OF DYNAMIC PHENOMENA
The existing methods of forecasting dynamic phenomena do not meet the modern requirements for accuracy and high intensity of mining operations. Further improvement of the methods should be aimed at ensuring continuous monitoring by using numerical values of prognostic parameters and their threshold values. One of the potential implementations of such approach is utilization of natural and artificial seismoacoustic and acoustic signals. For the mines of Donbass, which are most hazardous in terms of the gas-dynamic phenomena, the methods for solving a number of forecasting tasks based on registration and analysis of the artificial acoustic signal originating in rock mass under the influence of mining equipment have been successfully applied. Based on these advances an automated system has been developed for acoustic monitoring of the condition of the rock mass and forecasting of the dynamic phenomena SAKSM, which includes equipment for recording and transmitting the signal and software for processing and analyzing the signal. The system provides forecasting of all types of dynamic phenomena and geological fauts ahead of a moving face. The SAKSM system has undergone acceptance testing and is recommended for utilization in coal mines in Russia.
Key words: forecast, dynamic phenomena, monitoring of the condition of rock mass, acoustic signal.
TAVOSTIN M.N., KOSHELEV A.E., OSIPOV YU.V.
STUDY OF PHYSICO-MECHANICAL PROPERTIES OF ROCK SALT WITH THE TENTATIVE COMPREHENSIVE LOADING
The paper presents experimental investigations of rock salt. These studies were carried out for the solution of practical tasks of design, construction and operation of underground gas storages (UGS), created in rock salt. The results showed that pre hydrostatic compression and subsequent testing of the deformation modules and modulus Poisson's ratio, and the strength of samples increases significantly increased in comparison with standard methods of research. Equations are obtained that can be used when determining the elastic modulus and Poisson's ratio of rock salt in complex stress state, knowing only the values defined under uniaxial compression.
Key words: underground gas storage, rock, rock-salt, stressed state of the rocks, hydrostatic compression.
CHRONICLE OF HISTORICAL EVENTS МGА — МGI — МGGU — МISIS
THE SAFETY OPERATION OF BUILDINGS AND STRUCTURES PETROCHEMICAL FACILITIES AND REFINERIES IN CORROSIVE CONDITIONS
TERESHIN A.A., ALEKSEEV G.V.
RECOMMENDED WORKING PROCEDURE FOR GEODETIC MONITORING OF DEFORMATION OF BUILDINGS IN RUSSIAN ORTHODOX HERMITAGE ON ANZERSKY ISLAND, SOLOVETSKY ISLAND GROUP
The scope of the analysis encompasses all possible scenarios of using traditional geodetic methods for monitoring displacements of slopes and buildings of the Refectory and Church (linear and angular intersections and resections, ranging, precision leveling etc.). It is proposed to record relative horizontal displacements of the Refectory and Church buildings based on sufficient linear measurements taken between special-purpose survey markers on the Refectory and Church walls given the stable horizontal position of the Church building. Such monitoring requires minimum material input and labor costs as against the traditional geodesy observation techniques.
Key words: geodetic monitoring methods, deformation of buildings and structures, survey marker.
BUILDING OF UNDERGROUND CONSTRUCTIONS AND MINES
MINING-AND-GEOLOGICAL AND ENGINEERING PROBLEMS IN CONSTRUCTION OF UDACHNY UNDERGROUND MINE
The article gives a review of the mining-and-geological and engineering problems in Udachny mine. According to the research results, drainage brines in Udachny mine contain a number of valuable and critical elements for national economy. The highest concentrations meeting industrial standards belong in the regionally spread strong brines containing magnesium, lithium, iodine, etc. Corrosiveness of these high-concentration brines relative to various materials and equipment is very high and depends, first of all, on the acidic reaction of the medium. Intrapermafrost water in the region is characterized by the overall gas-saturation, with maximum content of hydrocarbon gases. The article offers a reduction chart for migrating gas flows with pre-degassing of rock blocks adjoining Udachnaya pipe.
Key words: permafrost zone, mining-and-geological conditions, gas-saturated brines, Udachnaya pipe, underground mine, metamorphized water corrosiveness.
MINING CARS, THE EQUIPMENT AND TRANSPORT
ANALYSIS OF BASIC RESEARCH TRENDS CONCERNED WITH EFFECT OF THE GRINDING CHARGE DYNAMICS ON THE STRUCTURAL INTEGRITY OF VIBRATING MILLS
The article deals with the analysis of the works which are dedicated to the investigations of firm characteristics of the basic details of vibratory mills. The analyses of mathematical models has been carried out taking into consideration the action of the radial forces which act to the walls of the grinding tube. The calculation of the unit was done according to MSC. NASTRAN system.
Key words: charge motion, grinding tube, vibratory mill, forces, mathematical models, MSC, NASTRAN system.
LEKONTSEV YU.M., SAZHIN P.V.
ANALYSIS OF OPERATION MODES OF INITIATION SLOT FORMER
The slot former with parabolic guide inclines has been developed to cut initiation slots up to 135 mm in diameter in blasthole walls. During cutting of initiation slots, the cutting members of the slot former are continuously fed with wash-and-cool fluid through inner holes in drill rods and housing. The cutting members of the modified slot former are reinforced with tungsten carbide inserts VK10 or VK15, with average cobalt content. The use of this material is conditioned by the comparatively low cutting forces and by the absence of impact loading of the cutting member during initiation slot formation. The modified slot former is capable of cutting initiation slots with diameters over 25 % larger than slots cut by the slot former prototype.
Key word: slot former, blasthole walls, drill rods, initiation slot, cutting member.
ABOUT PROPORTIONS OF THE WORKING EQUIPMENT OF HYDRAULIC EXCAVATORS
In article it is shown that in improvement of the working equipment of the hydraulic excavator there are essential reserves. It is carried out due to comparison of the working equipment with a hand of the person by criteria, known in a robotics. Some more important conclusions are in passing drawn.
Key words: hydraulic excavators, the working equipment, hand of the person.
WORLD MARKET OF ADVANCED EXTRACTION-AND-LOADING MACHINES FOR OPEN PIT MINING
According to the State Program of the Coal Industry Development for the Period up to 2030 the coal sector of the Russian Federation is expected to increase the total annual coal output to 430 million ton, including coal output increase to 268.2 million ton at 82 openpit mines in 2030 versus 255.1 million ton at 137 open-pit mines in 2012. The reduction of the number of openpit mines from 137 to 82 will be inevitably accompanied by the increase of their average annual production capacity from 1.93 to 3.27 million ton (1.7-fold) that cannot be implemented without radical renovation of the available fleet of mining machinery and equipment, first of all due to the application of higher capacity home-made and imported excavation and transport machinery, drilling and auxiliary equipment. The objective of this article is the analysis of the state-of-the art of the international and national markets of mine excavating and loading equipment, which are in the greatest demand at surface mining operations, and identification of some trends of its development. This machinery and its analogs will inevitably come to the Russian opencast and open pit mines.
Key words: Surface mining equipment — front and backhoe shovels; draglines; hydraulic excavators; frontal wheel loaders; dozers; wheel excavators; spreaders; continuous miners.
ANALYSIS OF TRACTION COEFFICIENT OF MINE LOCOMOTIVES VERSUS ROCK ABRASIVENESS
The article gives a review of many-years research of the relationship between traction coefficient of trolley, accumulator and trolley-accumulator mine locomotives and abrasiveness of rocks. The analysis involved different values of abrasiveness of impurity on the top of rails. Test data for an accumulator locomotive with polyurethane-coated wheels are presented.
Key words: mine locomotives, abrasiveness, rocks, traction factor, top of rail, locomotive power, skidding of wheels.
STEPANENKO V.P., BELOZEROV V.I.
APPLICATION OF COMBINATION (HYBRID) POWER-PLANTS FOR MINE TRANSPORTATION VEHICLES
It is possible to design safe, energy- and resource-saving, high-capacity locomotive units suitable for application in deep open pit mines and under the far north conditions using advanced energy storage units: inertial, electrochemical and electric double-layer capacitors (supercapacitors). Further improvement of open pit locomotive units will be enabled by replacement of traditional commutator dc drive with the modern commutatorless and gearless ac motor.
Key words: open pit mine, locomotive units, combination power-plants, energy storage units, supercapacitors, inertial energy-storage unit, electrochemical energy-storage unit.
FASHCHILENKO V.N., VARFOLOMEEV S.V.
DRIVE CONTROL SYSTEM FOR SUCTION-AND-EXHAUST VENTILATION OF PROCESSING PLANTS
Under analysis is the model of control system for suction-and-exhaust ventilation. The key tasks and requirements for an industrial ventilation system are defined. The structure and algorithm of the control system operation are developed.
Key words: electric drive, fuzzy logic, suction-and-exhaust ventilation.
KHOLODNIKOV YU.V., BOYARSKIKH G.A.
REPAIR STRATEGY SELECTION AND PROCESSING EQUIPMENT UPGRADING USING COMPOSITE MATERIALS
The article analyzes the current status of processing equipment of machine building and repair plants in Russia. The critical level of aging and slow rate of renewal of primary equipment is emphasized. Low efficiency of the working equipment and the equipment repair technologies aggravate the current condition. At the stage of transition to more efficient strategies of primary equipment repair and renewal, various modifications of operational repair systems using composite materials are proposed. In this context, technical-and-economic prerequisites of new repair strategies are discussed.
Key words: equipment, repair, renewal, composite materials.
AUTOMATION AND INFORMATION SYSTEMS
ON MODELS AND OPTIMIZATION METHODS FOR PROBLEMS OF OPEN PIT DESIGN
The setup and solution of ultimate and intermediate open pit design contour determination problems with the aid of optimization methods and man-machine dialog are considered. Possibilities and prospects of methods based on block, contour and combined representation of a quarry shape are compared. For Lerchs-and-Grossman type methods ways of determination of a graph of possible block mutual disposition are proposed that enable to take into account non-uniformity of a rock mass resulting in change of stable inclination of slopes. It is emphasized that the efficient treatment of such non-uniformity may be effected with a iteractive process of localized change of horizontal block sizes. Possibilities of emprovement of pit limits obtained from a block model by imposing condition of transportation access are considered as well.
Methods of open pit limits optimization via contour models are treated as ways of emprovement of a pit principal shape and contour obtained from block models to satisfy additional conditions of technological implementability. It is proposed to evolve recent contour models into the model with parameter skips on surfaces separating rock types and techmological zones. Such models may be constructed like hybrid dynamic systems (event-swithched processes).
Experience of application on sectoral models for problems of planning for a year or several year period is analyzed as well as possibilities of their application for problems of open pit design.
Key words: open-cast mining, ultimate and stage pit limits, mathematical models, optimization, optimum control, hybrid systems.
PEVZNER L.D., BABAKOV S.Е.
MATHEMATICAL MODELLING AND CONTROL OF QUARRY POWER-SHOVEL FOR TRANSPORTATION OPERATIONS
Description over of dynamics of motion of working organ of quarry power-shovel for rock transportation is brought taking of his calculation chart to the chart of equivalent five link manipulation robot on the method of Belousova (Institute of the applied mathematics of Russian Academy of Sciences the name of M.V. Keldish). The mathematical model of kinematics of scoop cogs for power-shovel and coefficients of equalizations of his dynamics are got. The algorithm of transportation operation control, basis of a generalized coordinates control of the power-shovel is given.
Key words: excavator, quarry power-shovels, dynamics, transportation, rock, manipulator.
FEATURES OF THE DESIGN ELEMENTS OF THE UNDERGROUND GEOTECHNOLOGY IN THE LIGHT OF THE STRESS-STRAIN STATE OF MOUNTAIN RANGES IN THE MSC NASTRAN FOR WINDOWS
Optimization algorithms make it possible to study the influence of various parameters on the behavior of the target function and manage the process of finding the optimal solutions. An example of geometric model purification unit for the version of room-and-pillar system development. Modeling done on the basis of mining and graphic documentation of existing mines. In view of these features define the parameters of stress-strain state of «rock roof-pillar» alternative solutions in a plane problem for the elastic-plastic material and predict the amount of obrusheny rocks from the roof of cleaning the cells.
Key words: underground Geotechnology, design, finite element method, mining massif, mining pressure zone.
AEROLOGY, METHANE, SAFETY
ALYMENKO N.I., NIKOLLAEV A.V.
METHOD OF VENTILATION MINING AREA POTASH MINES IN REVERSE ORDER MINING AND QUARRYING
The article describes the current and previously proposed scheme of preparation, processing and ventilation mining area potash mine. The description of the shortcomings of these schemes related to countering the desired direction of movement of air mining area, practiced by the drop formation, thermal depression (natural draught). Provides a method for preparing, processing and ventilation mining area potash mine executed by the dip of the formation, which initially calculated value of thermal depressions that will arise between the workings as mining. At the initial and final stages of the mining excavation quarrying in the proposed method of excavation is proposed to isolate the mobile mine ventilation flap for the working chamber. At a time when the heat of depression occurring between workers and exhaust chambers will be able to counteract the air leakage in conveyor-airway, mine ventilation bridge dismantled. Also, to prevent «short-circuiting» a breath of fresh air directly to the conveyor-airway, the article suggests to isolate workers development for the descent of ore (ore passes). The design of the device to shut off the ore pass.
Key words: the mining area, ventilation, thermal depression, natural draft, the mobile mine ventilation flap, a device for closing the ore pass.
KARKASHADZE G.G., HAUTIEV A.M-B.
MODELING COAL BED DEGASSING WITH WELLS CONSIDERING GEOMECHANICAL STRESSES
Presents research process coal seam degasification through wells drilled from underground mine workings. The analytical model includes a system of differential equations describing the mass transfer of methane in the coal seam and the host rocks on the basis of the Darcy law and the Langmuir equation. Geomechanical model takes into account the stress-strain state of a coal and rock mass to match the diameter of the wells and under the action of rock pressure. The relationship between the permeability of a coal seam and medium mechanical stresses set of experimental exponential dependence. Performed computer modeling of the process of degassing means «COMSOL Multyphisics». Presents graphs showing the stress state around the degasification wells, the distribution of the total gas pressure in the coal seam and the flow rate of methane in the course of time. It is established that the factor of stress concentration around the borehole leads to increased permeability and increased inflows of methane, which is of practical interest when solving problems intensify coal seam degasification. Computer simulation results correspond to measurements of the actual flow rate of methane in the mine conditions.
Key words: coal, methane, equations of gas transfer, geomechanics, modeling, degassing, rock pressure, permeability, flow rate of methane.
HAZARD METHANE ON THE VIETNAMESE COAL MINES AND PREVENTION MEASURES
The problem of methane danger is presented on the Vietnamese coal mines. Description of the various management measures and technical measures against it by realization of degassing of layers are given.
Key words: hazard methane, methane, degassing, technical and management measures against methane danger.
KOVALEV O.V., KHYNG B.V.
PRINCIPLES OF EFFECTIVE GAS DRENAIGE SCHEMES FOR OVERMINED COAL BEDS CONSIDERING GEOMECHANICAL FACTOR
The expediency of increasing the effectiveness of the prevention with methane in the coalmines of Vietnam on the basis of estimates mining geomechanical factor. Reference to conditions in the coal beds, this factor allows for the formation of degassing design of the underlying seam given the variability in space and time their filtration properties. This approach allows us to solve issues respectively expanding field of integrated production of energy resources (coal, methane) in the coal mines in Vietnam.
Key words: methane, methane gas content, degassing, volume deformation of rocks, the area mining underlying seam, gas dynamic characteristics.
INSTALLATION FOR AIRING NOT DEEP PITS AND CLEAN ISSUED BY THE AIR OF DUST
The article provides a description of the proposed facility design for ventilation shallow pits. Use in the installation a ductwork, capable of moving in both horizontal and vertical plane can increase the size of the area of ventilation pit. Located in the cyclone installation allows dust extraction passing through the installation air of large fractions and dust. The article also shows the algorithm for calculating the required output settings according to the fractional composition of the dust. To improve performance, install a fan is proposed that, acting as installation for ejection that can improve the energy efficiency of ventilation. Taking into account the fractional composition of the dust generated in the pit after the explosion and during work and its depth can select installation options for airing pit and cleaning the air issued from dust. In addition, this article provides a calculation of the total volume flow of air in the vent pipe using ejecting installation, after which it is possible to select the desired performance ductworks.
Key words: Airing, pit, dust extraction, cyclone, installation for ejection, ductwork, vent.
NIKOLLAEV A.V., ALYMENKO N.I., SEDUNIN A.M., FAJNBURG G.Z., NIKOLLAEV V.A.
ANALYSIS OF A AIR PREPARATION AT THE MINE BPPMG-2
In the implementation of air preparation in the cold season, the need for which is caused by the safety rules governing the temperature of the air supplied to the air intake shafts of at least 2 °C, a number of problems associated with enormous costs of natural gas consumed in the heating of the air supplied to the air intake shafts, and power expended on the work of the main ventilation instalation (MVI). In order to improve energy and resource efficiency in air preparation in the present study were analyzed causes of overspending natural resources for heating the air in the mine air-heating installation (MAHI) and the electrical energy consumed in the work of the MVI, the example of mine BPPMG-2 Public Joint Stock Company (PJSC) «Uralkali».
Key words: air preparation, mine air-heating installation, main ventilation instalation, resource conservation, automation system, natural draft, thermal depression.
ECONOMICS AND MANAGEMENT
GALIEV ZH.K., GALIEVA N.V., SARATOVKIN V.F.
OPERATING EFFECT OF PRODUCTION PLANTS IN CEMENT INDUSTRY
In article depending on a way of preparation of raw mixes the dry, wet and combined ways of production of clinker — the basis production cycle of production of cement rassamatrivatsya.
The structure of average production prime cost of average cement is given. The high share of depreciation charges at a dry «new» way attracts attention production of cement that allows to form sufficient internal sources of financing for timely introduction of high-performance cars and the equipment instead of physically worn-out and obsolete fixed assets.
For an assessment of small number of the enterprises sellers Herfindalya-Hirshman's index is considered, classification of concentration of the markets is given. Value of an index of Herfindalya-Hirshman for conditions of the cement industry that characterizes the level of moderate concentration of production is calculated.
Value of elasticity of demand is determined by the price in the conditions of the cement industry. The ratio of an index of Herfindalya-Hirshman and elasticity of demand at the price testifies that in the cement industry the moderate concentration (a structure of branch) and average profitability of branch (result) taking place are defined is interconnected and at the same time.
In relation to tasks of the cement industry — to determination of volumes of deliveries of production of suppliers, formation at the specific consumer price level — the economic-mathematical model of use of function of minimization of expenses is considered.
Key words: production cycle, way of production of cement, structure of average production prime cost of average cement, Herfindalya-Hirshman's index, elasticity of demand of cement production at the price, classification of concentration of the markets, moderate concentration of production, a ratio and elasticity of demand at the price, economic-mathematical model of use of function of minimization of expenses.
RESEARCH OPPORTUNITIES TO ATTRACT DEBT CAPITAL COMPANIES MINERAL COMPLEX THROUGH MARGIN TRANSACTIONS IN THE STOCK MARKET
The author considers the latest international market trends of financial borrowings, indicates a significant increase in the significance of stock exchanges of different categories: equity, commodity, foreign exchange, derivatives exchange.
This article provides guidance to companies mineral complex of the Russian Federation to participate in the exchange stock trading in order to attract more cheap debt capital compared to the traditional bank loan. Alternatively loan considered marginal operations that involve receiving money from the broker in online.
To justify the attractiveness of margin transactions in the article considers three scenarios for committing speculative operations on the Moscow Stock Exchange: at their own expense, due own and borrowed funds (bank loans), due to the own and borrowed funds broker (margin loan). Financial result reflects the investor the greatest benefit from the use of borrowed funds broker.
Key words: marginal operations, margin transactions, margin loan, stock exchange, stockbroker, securities, interest rate, the financial result of the investor.
THE PROBLEM OF ECONOMICAL RISK IN ANTI-CRISIS MANAGEMENT AT MINING ENTERPRISES
At the article the author explains next definitions: economic risk of mining enterprise, classification of economic risks and risks 'factors, and the model of losses. For a more detailed classification of internal factors of production and economic risk was used the method of expert evaluations. Based on the result of the examination data built table of internal factors of production and economic risk of the mine. Assess the actual provisions of the coal mines identified reserves improve the situation, developed a list of antiischemic events and possible alternative strategies mines.
Key words: economic risk of mining enterprise, economic risks' factors, the risk/benefit ratio, coal-mining enterprise.
SYSTEMATIC APPROACH TO EVALUATING THE STRATEGIC DEVELOPMENT OF THE REGIONAL FUEL AND ENERGY COMPLEX OF RUSSIA (QUESTIONS OF THEORY, METHODOLOGY AND PRACTICE)
Article updated by the problem of improving the adequacy of the strategic assessment of regional development of the Russian fuel and energy complex. The lack of algorithms and techniques the system of estimates for the energy sector are space in the system analysis methodology applied to the development and operation of complex economic systems-regional fuel and energy complexes in the long term. The article reveals the essence and the basis for the development of the regional energy sector as systems, their inherent principles and postulates(axioms) development. On the basis of the formulated axioms for the development and functioning of the regional energy sector should determine practical objectives for management of energy companies. To resolve methodological and practical problems in the field of efficient transformation of the regional energy sector the article defines a set of rules ensuring the harmonious development of regional economic systems based on the transformation of the regional energy sector in energy efficiency and alloweffective. The purpose of the article promoting the development of system studies as an interdisciplinary: political, economic, technological, technical, environmental and so on, for the development of theory and methodology of system analysis and improve the efficiency of management decisions.
Key words: system approach, system paradigm, fuel and energy complex, strategic development.
POSTNIKOV V.I., TKACH V.R., AGAFONOV V.V.
OPTIONAL ASSESSMENT ENDORSEMENT OF THE VALIDITY OF DESIGN DECISIONS COAL MINES
The results of the option of evaluating investment projects in comparison with the method of the net discounted cash flows in relation to coal deposits. Mining of coal to be interpreted as an option companies to delay and can be estimated using the Black — Scholes model, model evaluation neimitiruemogo real call option and models based on the full time pricing structure. Proved that the more universal is the real options valuation model based on mass criterion. This model takes into account the specificity of an investor who decides to participate in the project, namely, takes into account the size of its equity and its level of unacceptable risk. Based on the above coal companies and a separate independent coal mines rationally focus major efforts to increase revenues rather than spending cuts — this conclusion seems a key element in the choice of management strategy option value. Conducted testing of optional approach based on available data on actual projects implemented in areas of new development confirmed that the real options method gives a more objective evaluation of design decisions technological systems of coal mines and the argument for a positive investment decision, compared with DCF.
Key words: coal deposit, real options, optional approach, net present value, the action, the uncertainty model Massa Black-Scholes model.
OPERATING EFFICIENCY OF FINANCIAL ESTABLISHMENT (BANK) IN THE CONTEXT OF UNDERTAKEN INFORMATION SECURITY MEASURES
The correlation is validated between the operating efficiency of a financial establishment (bank) and the information security measures it undertakes. The analysis covers the current methods and techniques of estimating operational effect and information security systems of financial establishments, and regulatory requirements posed on information security. The author illustrates scientific and practical importance of procedures for quantitative evaluation of role and weight of information security systems. The main objectives on the way of developing such procedures are identified. It is shown that such procedures are called for by specialists of information security department and bank management. The author has prepared proposals on application of a tool composed of key performance criteria to improvement of interaction between operational departments and information security office.
Key words: information security, banking activities, efficiency, measures of efficiency, hazards and risks, financial stability, expert appraisements, finance indexation, targets, key performance indicators.
SELECTING ESTIMATION CRITERION FOR INFLUENCE OF INFORMATION SECURITY MEASURES ON ECONOMICAL EFFECTIVENESS OF A BANK
The estimation criterion is developed and offered for influence exerted by information security measures on economical effectiveness of a bank. The considered aspects are concerned with assessment of influence of undertaken information security measures on operating efficiency of a financial establishment (bank). The theoretical and practical importance of the procedure allowing quantitative evaluation of role and weight of information security systems as well as the significance of the criterion for influence of information security measures on bank performance is illustrated.
It is emphasized that it is not only the information security measures the influence performance of a bank, but also the attitude of the bank management to the information security problems and the financial position of the bank, directly related with the bank performance, in many ways condition the level of quality of the bank information security. The studies involve the current approaches to estimating efficiency of information security systems. The content and essence of the current criteria of banking activity efficiency are exposed.
Key words: information security, banking activity, efficiency, measures of efficiency, hazards and risks, financial stability, expert appraisements, finance indexation, targets, key performance indicators.
RISKS FOR INFORMATION SECURITY OF FINANCIAL ESTABLISHMENT (BANK)
Based on the cross-disciplinary analysis, the risks for the information security of a financial establishment are identified to be used in modeling hazards for different banks. The hazard models are the basis of quantitative evaluation procedures for information security efficiency and assessment of influence of information security measures on a financial establishment performance. The article highlights the scientific and practical importance of the quantitative evaluation procedure and the information security systems. The content and essence of entitative correlation between performance and information security of a bank are exposed. It is emphasized that objective assessment of risks allows a comprehensive approach to information security and, furthermore, attention of senior management, which is important as the efficient information security implementation in the up-to-date conditions requires both financial investment and appropriate support by bank promoters, management of executive departments and board of directors.
Key words: information security, banking, efficiency, measures of efficiency, hazards and risks, financial stability, expert appraisements, finance indexation, targets, key performance indicators.
PROBLEMS OF LEGAL REGULATION OF ACCOUNTING TERM AND SUM DIFFERENCES IN RUSSIA
This article raises issues of legal regulation of accounting coursework andsettlement differences in the Russian Federation are the two main problems — these are the problems associated with accounting and tax legislation.
Key words: exchange rate difference, the difference, the legal regulation of foreign exchange and value differences.
ELECTRIFICATION MINING ENTERPRISES
KOSTAREV I.A., SAPUNKOV M.L.
THE DEVELOPMENT AND RESEARCH INTO 6—35 кV NETWORK PROTECTION AGAINST GROUND FAULTS PROTOTYPE DEVICE
This article presents the results of development and research into new high-efficient protection against ground fault prototype device performance in 6—35 kV compensated network. Protection against ground fault (GF) prototype and physical model of a compensated network were development for experimental research. Waveform characterizing work of protection for sustainable and intermittent faults were obtained as experiment results. Based on these waveforms there was found that protection against GF device will successfully respond to both stable and in the intermittent ground faults, since the coefficient of sensitivity protection was 4–75.
Key words: medium voltage networks, protection against ground faults, compensated neutral, prototype device.
UNDERGROUND PUMPED STORAGE IN POWER ENGINEERING
The features of the constructions the underground pumped-storage stations are presented. The new trend of underground power — complex pumped-storaged station — nuclear power station are considered. The possibility of use the worked out mined excavations for underground pumped-storage stations are studied.
Key words: underground, pumped-storage, station, machine hall, lower basin, worked out mined excavation.
KLISHIN I.V., SHCHEPTEV E.N., KOLTYSHEV V.N.
DEVELOPMENT AND JUSTIFICATION OF CONCENTRATED GREATER-DIAMETER EXPLOSIVE CHARGE PATTERNS IN BLOCK MINING
The authors propose the multiblasting patterns of concentrated greater-diameter explosive charges. The specific explosive consumption in the secondary crushing circuit is found.
Key words: charges, explosive, block, breaking, deposit.
LAVRINENKO T.V., SEDYKH B.N., MONAKOV A.S.
EFFECTIVE APPLICATION OF POLYMERIC MATERIALS IN INDUSTRY
The current technologies reduce the dependence of production on negative aftereffect of abrasive and aggressive environments. Polymeric materials offer this opportunity with no heavy capital input required. The author describes polymeric materials ABRAZIVELAST®, UKREPAN® and KREMKREPAN® developed by RVSK. The article reviews basic physico-mechanical parameters of polyurethane rubber and specifies spare parts and elements made of polyurethane rubber for process equipment in mines. With the polyurethane parts, the equipment performance is improved and the repair interval is extended.
Key words: abrasive and aggressive environment, polyurethane rubber, machine parts, polyurethane rubber sputtering.
NATURAL TYPES OF THE PYRITACEOUS ORES AND CRITERIA FOR PROGNOSIS AND SEARCH INDUSTRIAL ORES (ON AN EXAMPLE OF URAL MOUNTAINS)
Commercial sulfide ore deposits are the peculiar ore bodies formed on the basis of unstratified iron pyrite entrained in block folding and dynamometamorphism. Structural control of commercial sulfide ore deposits in the Ural is induced by destructive tectonogenesis (squeezing tectonics) and matured in the course of the second mountain building under synchronous oceanization of Atlantic rift valley bottom.
Key words: Ural Mountains, pyritaceous ores, greenschist, Evolution of the crystalline base, ejective tectonics.
ADIGAMOV A.E., KHAYRULLINA A.R.
THE LINEAR PROGRAMMING METHOD IN PLANNING AND OPERATING MANAGEMENT FOR PRODUCTION OF ROAD CONCRETE MIXES
The methods and models of planning and operating management for production of road concrete mixes are suggested. The methods and models were successfully used in the course of years on road concrete factories of road building industry.
Key words: the methods and models, the linear programming method, operating management, road concrete mixes.
DEDOVETS M.S., SEN’KO O.V.
METHODS OF RELIABILITY ANALYSIS BASED ON SEARCHING OF REGULARITIES IN DATA
The article presents a new reliability analysis method based on building optimal, statistically verified partitions of space of predictive variables and a method of estimation of life curves for different objects, based on collective decision-making using sets of objective laws. These methods require no a priori assumption on the character of a functional connection and are of use to solving wide range problems concerned with analysis process equipment reliability.
Key words: reliability analysis, life curves, functional connections.
KSENDZENKO L.S., MAKAROV V.V.
METHOD OF DETERMINING THE PARAMETERS OF THE MATHEMATICAL MODEL THE HIGHLY COMPRESSED ROCK MASS ACCORDING TO THE RESULTS OF EXPERIMENTAL STUDIES
As a result of experiments with samples the method of definition of parameters of model of zone destruction of a rock mass in conditions of greater depths is developed and characteristics of zone destruction on an example of breeds of the Nikolaev's deposit of the О AS RMC «Farpolymetal» are predicted. Hierarchical levels of deformation and destruction of rock and a way of transition from a level of the sample on a level of a rock mass are entered.
Key words: zonal destruction of strongly compressed rock mass, the block hierarchical rock, the sample of rock.
WORKS OF YOUNG SCIENTISTS
OPTIMIZATION OF CENTRALIZED AND LOCALIZED ENERGY SUPPLY OF MINERAL EXPLORATION SERVICES CUSTOMERS
Rationale for optimum energy technology consumers geologoraz — prospecting work by modeling the internal power supply system in the new conditions of functioning businesses. The group determines the connection to the source of energy cost reduction, but calls for the construction of communication networks, which include electric line — and the heat transfer, which is associated not only with material costs, and technical capabilities of the transfer of thermal energy, which in turn is connected with the question of the use of electricity for generate heat. Therefore, a feasibility study on the use of group energy sources is an urgentmulti-faceted problem whose solution will define the boundaries of rational development of such integrated systems in the production of energy exploration.
Key words: power supply, utilization, centralized power systems, local energy sources.
PRINCIPLES OF MINING EQUIPMENT MAINTENANCE MANAGEMENT
The analysis of acquisition gornoprohodcheskoj equipment and services. Given the comparative cost of acquiring mining loading machines and spare parts Described six variants of the organization of tools, their advantages and disadvantages. It is shown that with increase in the level of satisfaction of consumers ' demand will have to store a large range of parts. This significantly increases the cost of necessary reserves and costs of their storage.
Key words: gornoprohodcheskoj equipment, service, spare parts, inventory management, repair and maintenance.
CAMELS RATING SYSTEM IN THE CONTEXT OF RUSSIAN BANKING SECTOR
This article describes the rating system used by Russian supervisors to assess and manage banking risks. It defines the criteria and procedure of conferring rating assessment on banks using the system. The paper also analyzes main advantages and drawbacks of the CAMELS rating system. It defines areas for further improvement.
Key words: banking supervision, banking regulation, financial condition of a bank, risk assessment system, banking risks, bank rating.