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在演马庄矿27111工作面采用高精度微地震监测技术对煤矿工作面顶、底板破坏程度进行了检测,分析监测数据可以知道:开采对采空区顶板和底板的强烈影响范围离煤壁和沿空顺槽各为30 m左右;工作面回采时,顶板的一般破裂高度为采高的5～8倍,最大破裂高度为采高的10～13倍;正常回采时底板的破裂深度为8～14 m;90%以上的破裂深度没有达到L8灰岩含水层,没有形成突水通道。实践证明,高精度微地震监测技术不仅可以作为突水危险工作面的预警手段,而且也是研究工作面围岩三维破裂的有效手段。
In Yanmazhuang Mine 27111 face using high-precision micro-seismic monitoring technology to detect the top and bottom of the coal mine face damage, monitoring data can be found: the mining of the roof and floor of the goaf strong influence range from the coal wall and When the working face is demolished, the normal rupture height of the roof is 5-8 times as high as the mining height and the maximum rupture height is 10-13 times of that of the mining height; the rupture depth of the sole plate during the normal mining is 8 ~ 14 m; the rupture depth above 90% did not reach L8 limestone aquifer, and no water inrush channel was formed. Practice has proved that high-precision micro-seismic monitoring technology can not only be used as an early warning method of water-level danger in work-surface, but also an effective means to study the three-dimensional rupture of surrounding rock in working face.