九里山矿西部水大原因分析及对策

九里山矿水文地质条件复杂，矿井最高排水量为104．20m^3／min，吨煤排水量为116．87m^8，长期达不到生产能力。分析了矿区的地层、构造和水文地质条件，认为L9灰岩含水层是矿区的主要充水水源，充水通道为断层带及底板底鼓引起的裂隙带。另外，钻孔及注浆过程中的水位变化证实了L2潜伏水头的存在。指出矿区突水水量大的主要原因是：在采掘（工作面回采、巷道掘进）、矿压、水压的作用下，煤层底板的完整性被破坏而产生裂隙，当这种裂隙和L2灰含水层的潜伏水头沟通时，就会产生L2灰含水层的突水。据此提出了目前应对突水的措施是在14101工作面布置钻孔注浆，封堵煤层至O2灰含水层之间的所有含水层。

Causation Analysis and Countermeasures Cope with Large Water Inflow in Western Part of Jiulishan Coalmine

The Jiulishan coalmine has complex hydrogeological condition, maximum mine water discharge is 104.20m3/min, discharge per ton coal is 116.87m3, and thus mine production capacity cannot be achieved over a long period of time. After analyzed stratigraphy, structure and hydrogeologieal condition of the mine, considered that the L6 limestone aquifer is the main water filling source, and water filling channel is fault zone and floor heave caused fissure zone. Besides, water level changes during drilling and grouting confirmed the existing of L2 limestone cryptic water head. Pointed out the main reason of large quantity of water bursting is： under the actions of mining works （face winning, road heading）, rock pressure and water pressure, coal floor integrity destructed and fissures produced, when the fissures link up with cryptic water head of L2 limestone aquifer, water bursting happened. For the reason given above, present countermeasures to answer water bursting is to lay borehole cement dump in No.14101 working face, seal up all aquifers between coal seams and 02 limestone.