Основы создания подсистемы прогноза выбросоопасности многофункциональной системы безопасности угольной шахты

Abstract

Substantiation of the feasibility of incorporating the methods and means of the forecast of outburst hazard as a subsystem for forecasting outburst hazard into a multifunctional safety system of the coal mine is given. This is due to the reduction in economic costs for increasing the reliability of the forecast, since in this case the forecast can be carried out considering the information received by other subsystems of the multifunctional safety system. As such an outburst monitoring subsystem integrated with a multifunctional safety system, the combination of the spectral-acoustic forecasting method with the mine air-gas control system is justified. It is shown that for the efficient operation, the outburst hazard forecasd subsystem must meet the following requirements: be based on the geophysical methods for monitoring the stress state of the bottomhole space, control the main outburst hazard factors, have an operational method for determining the outburst hazard criterion for the planned development of a reservoir section, have a scientifically substantiated «depth of sensitivity» hazard ahead of the face, be computerized and have a dedicated infrastructure unit to maintain the system. The latter should include geophysicists trained in the physics of wave processes in the anisotropic media. It is shown that the outburst hazard forecast subsystem should include functional and supporting parts. Functional part responsible for the information processing algorithm to determine the indicator and criterion of the outburst hazard should be based on the outburst preparation model, which considers the main outburst hazard factors: rock pressure, in-situ gas pressure, and the coal strength. As such, the model of two-stage preparation of an outburst is considered. In accordance with this model, at the first stage, a block structure of coal is formed in the bottomhole space of the working due to the growth of cracks under the influence of rock and gas pressure. On the second stage, the destruction of a relatively thin layer of coal at the mouth of the outburst cavity and the squeezing of the formed pieces of coal into the working. After that, the actual outburst begins.