邻近终采线梯形煤柱冲击地压防治研究与实践

以济宁市金桥煤矿1304工作面为工程背景,通过分析该工作面邻近终采线梯形煤柱形成冲击危险的主要影响因素,结合微震监测、应力在线监测及预卸压效果分析,建立了相适应的支护和卸压方案。回采后期受超前支承压力等因素影响,梯形煤柱应力集中,为研究工作面回采期间渐缩煤柱应力分布情况,以1304工作面回采后期距终采线150 m梯形煤柱进入采动影响范围后为背景开展研究,采取预卸压、监测、压力显现观测等方法,掌握了梯形煤柱应力分布规律。

Research and practice on prevention and control of rock burst for trapezoidal coal pillars adjacent to the final mining line

Taking the 1304 working face of Jinqiao Coal Mine in Jining City as the engineering background,by analyzing the main influencing factors of the trapezoidal coal pillars adjacent to the final mining line of the working face,combined with microseismic monitoring,online stress monitoring and pre-loading effect analysis,a suitable adaptation was established.Supporting and pressure relief program.In the later stage of the stoping,the stress of the trapezoidal coal pillar was concentrated due to factors such as the advanced supporting pressure.In order to study the stress distribution of the shrinking coal pillar during the working face,the trapezoidal coal pillar was 150 m away from the final mining line in the later stage of the 1304 working face to enter the mining influence range.Later,research was carried out as a background,and methods such as pre-relief pressure,monitoring,pressure manifestation observation and other methods were adopted to master the stress distribution law of trapezoidal coal pillars.