Preventive repair of mining works as a method for preventing failures in the gas control system

One of the main causes of gas and dust explosions is gas contamination of workings of excavation or tunneling sections, which is caused by the unsatisfactory operation of ventilation and degassing systems. Failures of mine ventilation systems (SHVS) mostly consist of gradual failures. One of the reasons for such failures is aerodynamic aging of workings. Dependences are obtained for calculating the relative specific aerodynamic resistance of workings at any time in accordance with the mining development plan for section workings (haulage and ventilation) located in the zone of active rock pressure. Also, dependences were obtained for capital inclined and horizontal workings (field and seam). The method of protection of workings was taken into account: pillar-pillar, pillar-worked-out space, worked-out space-worked-out space. For local workings, they were differentiated by type of transport: conveyor or rail. In total, 13 types of groups of workings were compiled, in each of which there were from 60 to 100 or more research objects. Failures in mine ventilation networks caused by aerodynamic aging processes are referred to as wear failures. The main methods of dealing with this type of failure involve limiting the service life of the failed elements or their component parts. In the case of its aerodynamic aging, wear failure can be foreseen: it can be monitored and prevented by carrying out preventive repairs of the entire development or part of it. The method of scheduling preventive maintenance is prompt and applicable at any time step, taking into account the prospects for the development of mining operations. The method takes into account the stability of mine workings and the aerodynamic characteristics of mine ventilation systems (topology of the ventilation network, the aerodynamic resistances of the workings, the required air flow rates, air leaks, the resistance of the regulators, the characteristics of the main and local ventilation fans). The obtained dependences of the aging of the workings can be entered into the network problem of air distribution and the schedule for drawing up repair work at any time step of the simulation.

Skopintseva O.V. Preventive repair of mining works as a method for preventing failures in the gas control system. MIAB. Mining Inf. Anal. Bull. 2021;(2—1):54-63. [In Russ]. DOI: 10.25018/0236-1493-2021-21-0-54-63.

Skopintseva O.V., Dr. Sci. (Eng.), Professor, Professor, NUST «MISiS», Moscow, Russia, е-mail: skopintseva54@mail.ru.

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