石炭-二叠系煤层底板高承压岩溶水防治技术

Prevention and control technology of high pressure karst water from Permo-Carboniferous seam floor

为了开采平顶山天安煤业股份有限公司十一矿石炭-二叠系岩溶水威胁的己组煤资源,结合矿井岩溶水水文地质条件、岩溶发育规律和历年水文资料,分析了矿井充水条件和己组煤层岩溶裂隙带的分布规律,确立了浅部整体疏放、深部局部疏放和局部帷幕注浆相结合的方法,通过泄水巷和泄水孔联合工程、局部帷幕注浆和泄水联合工程、局部工作面防水工程等工业性试验,验证了方法的正确性。试验结果表明:通过长期的综合防治水治理,截至2016年底水压降至0.1 MPa,解除了底板岩溶水的威胁,实现了安全回采。

In order to mine a Ji Formation coal resources threatened by the Permo-Carboniferous karst water in No. 11 Mine of Pingdingshan Tian＇an Coal Company Limited,in combination with the hydrogeologic condition of the mine karst water,the karst development law and the passed year hydrologic information,the paper had an analysis on the mine water filling condition and the distribution law of the karst cracking zone in No. Ji Formation seam and a determination on a method combined with a shallow depth integrated discharging,a deep depth local discharging and local curtain grouting. With an industrial trial of draining lane and draining hole engineering,local curtain grouting and drainage engineering,and local working face waterproofing engineering,the correctness of the combined method was verified.The trial results showed that with a long term comprehensive water prevention and control,By the end of 2016,the water pressure dropped to 0.1 MPa,the threats of the karst water from the seam floor were eliminated and a safety mining was realized.