岩溶山区倾斜煤层开采条件含水层再造方法研究

Study on aquifer reconstruction methods under inclined coal seam mining conditions in karst mountain areas

本文针对矿区主要含水层特征分析,确定重点保护T1j含水层,其次为P3c含水层,提出了采用封闭不良钻孔重新启封段注浆和离层裂隙带压力注浆两种含水层再造方法修复含水层,着重分析了最优压力注浆的层位在位于拉伸区T1f7隔水层,其次是P3l/P3c浅层离层裂缝带,最后划分了含水层再造的有利区位,为岩溶山区煤矿水害防治和地下水资源优化利用提供理论依据。

According to characteristics analysis of main aquifer in mining area,we determine Tlj aquifer is of significance for the protection, followed by P3 c aquifer. Two reconstruction methods for aquifer,which are sealing poor boreholes and grouting to unsealed section, pressure grouting in separated strata fracture zone, are proposed in this paper. Also, we analyze and conclude that the optimal pressure grouting horizon is Ta f7 aquifuge in the tensile zone, followed by P31/P3 c separation cracks in separated strata fracture zone. Finally favorable location for aquifer reconstruction is classified, which provides the theory basis to prevent water disaster in karst mountain coal mine and optimize the utilization of groundwater resources.