Stress Evolution Characteristics of Lower Slice Coal Body During Mining the Thick Coal Seam

Simulation Study on the Safety Evaluation of Coal Mine General Mining Working Face Production System

“…Li Hongxia [4] evaluated the level of coal mine safety management based on hierarchical analysis and decision test and evaluation laboratory, and constructed a five-level coal mine safety management level evaluation index system by combining the characteristics of coal industry. chen Miao [6] indicated that the header working face is a complex production system, and in order to ensure the smooth operation of the production system of the header working face, the reliability analysis of the production system of the header working face of thick coal seam was carried out from three research perspectives of human-machine and environment, combined with the reliability analysis theory, to further improve the stability of the system through reasonable improvement. In order to explore the environmental reliability of the proposed mining working face, Huimin Zhang [10] analyzed the relationship between coal mine environment and coal mine accident hazards, took environmental factors as the evaluation object of coal mine safety hazards, used literature research method and field research method, constructed environmental factors affecting the safety of coal mine comprehensive mining working face, used entropy weight method to determine the weight of environmental factors index to avoid the problem of excessive subjective factors, and also established The quadratic linkage degree was used to evaluate the environmental factors of the comprehensive mining working face, and the results indicated that the proposed working face has less safety hazards and excellent environmental conditions and is suitable for mining.…”