微震监测技术在复杂地质煤矿开采优化及顶板控制中的应用

Application of Microseismic Monitoring Technology in Mining Optimization and Roof Control of Complex Geological Coal Mine

随着枣泉煤矿向深部开采,出现了矿压显现剧烈、巷道变形量大、工作面超前范围支护困难等问题,严重制约矿井安全、高效生产。通过提出在矿井布置微震监测系统,实时全方位监测岩体裂隙时空演化、破坏的过程,并对130203综放工作面的微震监测数据分析。结果表明,微震事件高密度区为煤层顶板上方40~120 m范围;工作面推进度较大时释放能力较大,围岩活动较为活跃;工作面煤壁前方124 m附近微震事件较为集中,为超前应力峰值区。微震监测数据可为工作面推进度管理及顶板岩层弱化位置、超前支护距离确定等提供科学依据。

With the deep mining of Zaoquan Coal Mine,there are some problems,such as severe mine pressure,large deformation of roadway and difficult support in advance range of working face,which seriously restrict the safe and efficient production of mine.The microseismic monitoring system is put for⁃ward to monitor the space-time evolution and failure process of rock fracture in real time and comprehensive⁃ly,and the microseismic monitoring data of 130203 full-mechanized caving face is analyzed.The result show that the high-density area of microseismic events is within the range of 40~120 m above the coal seam roof.When the progress of the working face is large,the release capacity is greater and the surrounding rock activity is more active.The microseismic events are relatively concentrated near 124 m in front of the coal wall of the working face,which is the peak area of advanced stress.The microseismic monitoring data can provide scientific basis for the management of the advancing degree of the working face and the determina⁃tion of the weakening position of the roof strata and the distance of advance support.