煤层顶板钻孔疏放水技术优化

Optimization of water drainage technology by drilling holes in coal seam roof

为解决对疏放工程优化布置、疏放效果评价等缺乏深入研究造成的顶板含水层过度疏放或者疏放不足等问题,以柠条塔煤矿S1200-3工作面为研究对象,进行钻孔疏放水优化。针对以往工作面疏放水存在的问题,在明确含水层水文地质特征及矿井涌水量影响因素后,实施井下疏放水试验,分析疏放水效果定量化指标,并在此基础上进行煤层顶板水疏放效果优化;通过灰色关联度理论,提出了疏放水效果判别准则。通过对所施工钻孔进行集中统一、持续疏放,可减少上覆含水层对工作面回采的影响,相关方法可以为实现矿井安全开采、降低疏放水成本提供一定借鉴。

In order to solve the problems of excessive or insufficient drainage of roof aquifer caused by lack of in-depth study on optimal layout of drainage engineering and evaluation of drainage effect,the No.S1200-3 working face of Ningtiaota Coal Mine is taken as the research object to optimize the drilling drainage.Based on the hydrogeological characteristics of aquifer and the influencing factors of mine water inflow,the underground drainage test was carried out,the quantitative evaluation index of drainage effect was analyzed,and the drilling layout of coal seam roof drainage was optimized.Based on the theory of grey correlation degree,the criterion of water drainage effect is proposed.Through the reasonable drainage of the drilling holes,the influence of the overlying aquifer on the mining face can be reduced,which can provide some reference for realizing the safe mining of the mine and reducing the cost of water drainage.