矿井煤层综放开采导水裂隙带发育高度研究

Study on Development Height of Water-Conducting Fracture Zone in Fully-mechanized Caving

针对马道头煤业存在煤层开采导水裂隙带与地下含水层连通,突水事故风险高的问题,该矿进行了导水裂隙带发育高度预测研究。分别采用经验公式计算法、关键层理论分析法、数值模拟法预测3号煤层8404采区的导水裂隙带高度为183~200 m。为验证理论预测的准确性,进行现场两个钻孔冲洗液漏失量、岩芯完整性实测,确定导水裂隙带发育高度为196~216 m,证明了理论分析法的准确性和实用性。

Aiming at the connection of water-conducting fissure zone with underground aquifer and the high risk of sudden water accident in Madaotou Coal Industry Co.,Ltd.,the author makes a study on the prediction of the development height of water-conducting fissure zone,in which the height of water-conducting fissure zone in No.3 coal seam 8404 mining area is predicted to be 183~200 m by empirical formula calculation method,key layer theoretical analysis method and numerical simulation method respectively,and the actual measurement of flushing fluid leakage and core integrity of two boreholes in the field is carried out,determining development height of water-conducting fissure zone is 196~216 m,which proves the accuracy and practicality of the theoretical analysis method.