内蒙古母杜柴登煤矿3^(-1)煤充水条件及矿井涌水量预测

Water Filling Conditions and Prediction of Mine Water Inflow in the 3^(-1) Coal Seam of Muduchaideng Coal Mine in Inner Mongolia

母杜柴登煤矿矿井涌水量大,且属于高矿化度水,面临着大量疏排矿井涌水和矿井水地面处理的压力。在分析矿区地质及水文地质条件的基础上,认为开采3^(-1)煤层时,矿井水来源于3^(-1)煤顶板─直罗组底界砂岩含水层,包括直罗组底部中、粗粒砂岩含水层和3^(-1)煤顶板延安组三段砂岩含水层。运用大井法和达西定律计算的30209工作面涌水量分别为931m^(3)/h、919m^(3)/h,与实际接近。研究可为工作面侧向注浆封堵(含水层改造)、帷幕截流减量的可行性和减量程度提供依据。

The Muduchaideng coal mine has a large amount of water inflow which is high salinity water,facing drainage and surface treatment of mine water.On the basis of analyzing the geological and hydrogeological conditions of the mining area,it is believed that when mining the 3^(-1) coal seam,the inflow comes from the sandstone aquifer at the top of the 3^(-1) coal seam and the bottom boundary of the Zhiluo Formation,including the middle and coarse-grained sandstone aquifer at the bottom of the Zhiluo Formation and the sandstone aquifer in the third section of the Yan’an Formation at the top of the 3^(-1) coal seam.The water inflow of the 30209 working face calculated using the large well method and Darcy’s law are 931m^(3)/h and 919m^(3)/h,respectively,which are close to the actual situation.Research can provide a basis for the feasibility and degree of reduction of lateral grouting sealing(aquifer transformation)and curtain interception in the working face.