千米深井巨厚火成岩下开采防冲研究

Study on erosion prevention of mining under thick igneous rock in 1000 meters deep well

通过对安居煤矿二采区采煤工作面依次开采后各时期覆岩空间结构演化规律分析,推断出剩余块段全采时的覆岩结构发展对上覆火成岩层的影响程度,从而对工作面优化设计提供依据,并对设计方案做出定性判断。剩余块段的安全开采证明,该覆岩空间结构演化分析方法是科学的,对相似条件下的冲击地压防治具有指导意义。

By analyzing the evolution law of overlying rock spatial structure in each period after sequential mining of the working face in the second mining area of Anzhu Coal mine,the influence degree of the development of overlying rock structure on the overlying igneous layer when the remaining block is fully mined is inferred,so as to provide a basis for the optimal design of working face and make a qualitative judgment on the design scheme.The safety mining of the remaining blocks proves that the method of spatial structure evolution analysis of overburden is scientific and has a strong guiding significance for rock burst prevention under similar conditions.