THE INFLUENCE OF THE NATURAL VARIABILITY OF THE COAL-ROCK MASSIF PROPERTIES OVER GEOMECHANICAL PARAMETERS OF MINE WORKINGS OF COAL MINES
The results of a brief analysis of efficacy and safety of underground mining of coal deposits with varying geological and geotechnical parameters are given.
The following is revealed:
1) The variability of the parameters of the rock massif is the result of sedimentation processes, geotectonics and manifests itself in the form of changes of coal seams properties and enclosing rocks within the deposit including: thicknesses, structures and incidence angles of seams; the parameters of disjunctive and plicative breaches, washouts, splits, clastic injections; strength and deformation properties, creep, fracture, tendency to bloating, gas and the bursting liability of coal seams and rocks; natural stress field.
2) The most significant influence on the performance of long fully-mechanized stope has a volatility of thickness and gas content of seam: when increasing of seam thickness excavation the production in a breakage face rises almost linearly, and under constraints on the methane content within from 0 to 12 m
3/ton the production is reduced in 3–5 times.
The conclusions and recommendations are confirmed by the results of numerical simulation of stress-strain state of coal-rock massif in the vicinity of mine workings during the mining of very closely spaced seams in Kuzbas.
Keywords
Variability of properties of rocks, coal seams suite, mine, mining working, rock thickness between the seams, rocks residual strength, stress concentration coefficient, rocks fracture area.
Issue number: 3
Year: 2016
ISBN:
UDK: 622.831.24
DOI:
Authors: Isachenko A. A.
About authors: Isachenko A.A., Deputy Chief Engineer on Technology
Branch «Mine «Erunakovskaja-VIII» «United coal company «Juzhkuzbassugol’», 654006, Novokuznetsk, Russia, e-mail: metall_kuzbass@mail.ru.
REFERENCES: 1. Gatinskiy Yu. G., Malyshev Yu. N., Prokhorova T. V. Fundamental’nye i prikladnye voprosy gornykh nauk. 2015, no 2, pp. 78–84.
2. Lazarevich T. I. Geodinamicheskoe rayonirovanie Yuzhnogo Kuzbassa. Monografiya (Geodynamic zoning of the southern Kuzbass. Monograph), Kemerovo, Vest’, 2006, 184 p.
3. Geologicheskoe obespechenie rabot po dobyche uglya: Sbornik normativnykh dokumentov. Pod red. A.D. Rubana (Geological support of coal mining: Collection of normative documents, Ruban D.A. (Ed.)), Moscow, Izd-vo «Gornoe delo» OOO «Kimmeriyskiy tsentr», 2011, 432 p.
4. Egorov P. V. Razrabotka ves’ma sblizhennykh plastov na shakhtakh Kuzbassa (Development of very closely spaced seams at the Kuzbass mines), Prokop’evsk, KuzNIUI, 1992, 286 p.
5. Klishin V. I., Shundulidi I. A., Ermakov A. Yu., Solov’ev A. S. Tekhnologiya razrabotki zapasov moshchnykh pologikh plastov s vypuskom uglya (The technology of development of the reserves of thick flat seams with the production of coal), Novosibirsk, Nauka, 2013, 248 p.
6. Fryanov V. N., Petrova O. A., Petrova T. V. Khroniki ob”edinennogo fonda elektronnykh resursov «Nauka i obrazovanie» № 08–09 (75–76) August–September 2015, pp. 2, available at: http://ofernio.ru/portal/newspaper05.php
7. Ozhegov S. I. Slovar’ russkogo yazyka (Dictionary of the Russian language), Moscow, Russkiy yazyk, 1982, 816 p.
8. Pershin V. V., Voytov M. D., Klyukin G. K., Sarychev V. I. Podzemnaya razrabotka plastovykh mestorozhdeniy (Underground mining of bedded deposits), Kemerovo, KuzGTU,
2014, 360 p.
9. Bauer E. R., Dolinar D. R. Skin failure of roof and rib support techniques in underground coal mines. New technology for coal mine roof support. NIOSH Inform. Circular. 2000. P. 99–109.
10. Biswas K., Mark C., Peng S. S. A unique approach to determining the timedependent in situ strength of coal pillars. Proc. of the 2nd Intern. Workshop on Coal Pillar mechanics and Design. Inform. Circular 9448. Vail, CO, USA, 1999.
11. Bräuner G. Gebirgsschläge und ihre Verhütung in Ruhrbergbau. Verlag Glückauf GmbH. Essen. 1992.
12. Haramy K. Y. McDonntll J. P. Causes and Control of Coal Mine Dumps. Bureau of Mines. Report of Investigations 9225. 1988.
13. Kurfürst W., Reuter V., Scheerer H-J., Veksler Ju. Online Data Analysis for a Prognosis of Rock Burst in Fully Automatic Longwalls. Zweites Internationales Kolloquium «Hochleistungs-Strebbetriebe High-Performance Longwall Operations». Aachen: RWTH 13. und 14.2000.