山西新阳矿太原组下组煤层底板岩溶水突水安全性评价

新阳矿9-10-11号煤层底板低于奥灰岩溶水位，承受水压较高，存在带压开采问题。依据矿区水文地质勘查资料，通过对9-10-11号煤层底板隔水岩层隔水性能、奥灰岩溶水富水程度、底板断裂构造发育情况、煤层底板承压大小以及采煤扰动底板破坏深度等突水因素分析，表明井田西南部断裂构造发育地段为突水危险区。分别采用突水系数法和突水危险度法对全井田9-10-11号煤层底板突水危险性进行评价，评价结果显示井田南部及断裂构造发育地段为突水危险区。理论分析与定量评价结果基本一致。针对9-10-11号煤层底板突水安全评价结果，提出了相应的防突水对策。

Safety Assessment of Taiyuan Formation Lower Group Coal Floor Karst Water Bursting in Xinyang Coalmine,Shanxi

The coal Nos.9, 10 and 11 floor in the Xinyang coalmine are lower than the Ordovician limestone karst water level, thus bear-ing with rather high water pressure and the issue of mining under safe water pressure of aquifer existed. Based on mine area hydrogeo-logical exploration data, analyzed water bursting factors including coal floor aquifuge water resistant, Ordovician limestone karst water yield property, floor faulted structure development, pressure on coal floor and mining induced floor failure depth and the like have shown that the faulted structure developed southwestern part of the minefield is the hazardous zone of water bursting. Using water burst-ing coefficient method and water bursting risk method carried out minefield coal Nos.9, 10 and 11 floor water bursting risk assessment, the result has shown that the south part of minefield and faulted structure developed sector are water bursting hazardous areas. The the-oretical analysis and quantitative assessment results are basically the same. On the basis of coal Nos. 9, 10 and 11 floor water bursting safety assessment result, corresponding water bursting control countermeasures put forward.