鸡西新发煤矿断层富(导)水性分析

Fault Water Yield(Transmission) Property Analysis in Xinfa Coalmine

新发煤矿位于鸡西盆地北部坳陷的北侧,断层及裂隙带是矿井与地表水、第四系含水层的主要通道。综合钻探、测井、抽水试验、电法勘探及矿井生产揭露等资料,对矿区9条典型断层特征及富、导水性进行分析,确认强富水性断层1条(F25),但导水性差;弱-中富水性断层4条(F7、F10、F11、F28),其中3条断层导水性差,仅1条具有导水性;弱富水性断层4条(F2、F3、F5、FXS3),但其中2条具有一定的导水性。通过分析还发现,矿井涌水多沿断裂面渗入,其导水以断层为主、裂隙次之;断层的富水性取决于断层与地面水体及冲积层的水力联系,而导水性取决于断层本身的破碎程度及与断层两侧含水层的接触关系。

The Xinfa coalmine is situated at north side of a depression in the Jixi Basin. Faults and fracture zones are main channels between surface water, Quaternary aquifer and the coalmine. Integrated drilling, well logging, pumping test, electric prospecting and mine production revealed data carried out 9 typical fault features and water yield（transmission） property analyses in the mine area. The analyses have determined 1 strong water yield property but poor water transmissivity fault（F25）; 4 weak-medium water yield property faults（F7, F10, F11 and F28）, 3 of which have poor transmissivity, only one water conducted; 4 weak water yield property faults（F2, F3, F5 and FXS3）, 2 of which are certain degree water conducted. Through the analyses have found that coalmine water inflow is mainly infiltration through fractured surfaces（mainly faults, fractures the second）. Fault water yield property lies on hydraulic connection between fault and surface water body, alluvium; while transmissivity lies on fault itself degree of crushing and fault both side aquifers contact relation.