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针对覆岩采动导水裂隙带高度的确定,以某矿21011工作面为工程背景,首先利用数值模拟软件FLAC~(3D)进行数值模拟,获得的结果较接近现场实测真实情况;选取了多种经验公式对顶板导水裂缝带高度进行了计算,结合“钻孔双端封堵测漏”技术对导水裂隙带发育高度进行现场实测,最后通过3种手段的综合运用,确定覆岩导水裂隙带的发育高度为38.6 m,进一步提高了开采上限,提高了资源回收率,为安全有效开采煤炭资源提供了科学决策依据。
Aiming at the determination of the height of water-conducted fractured rock mass in overlying strata, taking the 21011 working face of a mine as the engineering background, the numerical simulation software FLAC 3D was firstly used to simulate the actual situation of the fractured zone. Based on the empirical formula, the height of the aqueduct of fractured roof was calculated and the in-situ measurement of the height of the aqueduct fractured zone was carried out by combining the “double-ended plugging leak detection” technology. Finally, The development height of the water fracture zone is 38.6 m, which further increases the mining upper limit and increases the recovery rate of resources, which provides a scientific basis for safe and effective mining of coal resources.