随着工作面的不断向前推进，工作面上方岩层垮落高度不断增加，增大工作面矿山压力的同时导通了通水裂隙，直接威胁工作面生产安全。本文以某矿2301N 工作面为研究对象，对工作面的厚煤层分别从分层开采、网下综放、综放开采3种采煤方法的上方岩层垮落高度分析，进行比较。研究结果表明，综放采煤工艺上覆岩层裂隙发育最大，网下综放次之，分层综采最小，可为上覆岩层含水层及三下采煤提供借鉴。%With the working face advancing continuously,the caving height above strata of working face is in-creasing continuously,which increases mining pressure and conducts water cracks,directly threaten the face produc-tion safety.Based on the 2301N mining face as the research object,analyzes and compares the caving height above strata for thick coal seam in the working face through three methods of slicing,offline fully -mechanization and fully-mechanized caving mining.Research results show that in overlying strata,the overburden fracture develops furthest by fully mechanized coal caving minning technology,offline fully -mechanization is next,stratified fully mechanized mining is minimum.Uses for reference for mining under overburden aquifer and coal mining under three circum-stances.
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