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煤炭进入深部开采后,采场地应力增高,冲击地压灾害变得比以往更加复杂和严重。鹤岗南山矿237孤岛工作面是是含瓦斯、易自燃煤层,而且其地质条件和开采条件较为复杂,在开采中先后发生多次冲击地压。通过对该工作面冲击地压特征进行分析,除了具备有工作面及巷道变形和破坏的典型冲击特征外,还伴随有工作面瓦斯涌出异常和瓦斯浓度超限现象的发生。
After the coal enters the deep mining, the stress in the mining site increases, and the rock burst disaster becomes more complicated and serious than before. The 237 isolated island face of HeNan Mine in Hegang is a coal seam with gas and spontaneous combustion, and its geological conditions and mining conditions are more complicated. There have been many rock burst in the mining. By analyzing the characteristics of rockburst, besides the typical impact characteristics of working face and roadway deformation and destruction, there is also the phenomenon of gas emission anomaly and gas concentration overrun in the working face.