徐州矿区奥灰岩溶水突出的原因与防治

徐州矿区开采深度大，水文地质条件复杂，水害严重。主要突出水源为奥陶系含水层。突水原因主要有：底板隐伏陷落柱或断层导水；底（顶）板含水层与奥灰含水层对接；顶板冒落裂隙带导通断层对盘的奥灰含水层；奥灰水通过基岩隐伏露头侧向补给矿井。其防治对策为：引进先进技术手段，探查分析奥灰岩溶水发育规律；分区隔离开采，完善防排水系统；注浆封堵突水通道；排供结合，综合利用。

THE RESOURCES AND CONTROL OF ORDOVICIAN KARST WATER BURSTINGIN XUZHOU COAL MINING AREA

In Xuzhou Coal Mining Area the groundwater hazard is serious due to the larger mining depth and complicated hydrogeological conditions.The causes of water bursting,which source is Ordovician(O) aquifer,are as follows:hidden collapse column in coal seam floor or the fault is transmissible for groundwater;the floor(roof) aquifer connects to O aquifer,fracture zone of coal seam roof conducts with O aquifte that is located in opposite side of the fault;O groundwater recharges the mine through buried outcrop of bedrock laterally.The measures of groundwater hazard control are as follows:the development regularity of O karst water should be explored by advance technique;mining by areas and perfecting drainage system;plugging water bursting points with grouting;combining drainage with water supply and synthetically utilizing water resources.