房柱式采空区下工作面矿压显现规律研究

Study on Strata Behaviors Regulation of Coal Working Face Under Room and Pillar Mining Goaf

针对房柱式采空区下工作面顶板控制难、矿压显现强烈的问题,采用宏观矿压显现观测、支架工作阻力观测和理论分析的方法,对工作面在实体煤下、房柱式采空区下和不同房柱尺寸条件下的矿压显现进行对比分析。研究结果表明:22201工作面上方房采采空区内的煤柱,在基本顶岩梁断裂时或者断裂以后发生失稳、垮塌;房柱式采空区下工作面矿压显现要比实体煤下剧烈,房采大煤柱区下工作面矿压显现比房采小煤柱区强烈。研究成果对避免房柱式采空区下工作面支架大面积压垮和顶板垮落等事故具有指导意义。

Aiming at the problems of difficult to control the roof and the strongly pressure behavior of coal working face which under the room and pillar under goaf,by the method of the mine pressure behavior observation,the prospecting method of the support working resistance observation and theory analysis,the mine pressure behavior under the situation of solid coal,room and pillar goaf and different size of coal pillar in the room and pillar goaf,were compared and analysed. The results show that： the coal pillar instability and collapse appears when the basic roof fracture or after it; The strata pressure under the room and pillar goaf is stronger than the solid coal,and the strata pressure under small coal pillars is stronger than big ones. The research results have great significance to avoid large area support collapse and roof falling accident.