顾北煤矿13521里段工作面地面区域探查治理效果分析

Analysis of the Ground Surface Area Exploration and Control Effects of the 13521 Inner Section Working Face in Gu Bei Coal Mine

摘要: 针对顾北煤矿13521里段工作面底板C₃I组灰岩含水层富水性强、构造裂隙发育及突水风险较高的问题，采用地面区域探查与钻孔高压注浆相结合的综合治理技术，对底板含水层进行超前改造。基于钻探施工资料、注浆参数及数值模拟结果，结合井下钻探与物探检测，对注浆扩散规律及治理效果进行了系统分析。结果表明：治理后工作面范围内低阻异常区基本消失，钻探验证出水量显著降低，突水系数小于0.1 MPa/m安全限值，形成有效隔水屏障；数值模拟结果表明，注浆压力、水灰比及浆液粘度对浆液扩散范围具有显著影响。

Abstract: In response to the problems of strong water-bearing capacity, well-developed structural fractures and high risk of water inrush in the C₃I group of limestone aquifer at the bottom of the 13521 inner section working face in the Gu Bei Coal Mine, a comprehensive management technology combining ground regional exploration and high-pressure grouting through boreholes was adopted to carry out advanced transformation of the aquifer at the bottom. Based on the drilling construction data, grouting parameters and numerical simulation results, combined with underground drilling and geophysical exploration detection, a systematic analysis was conducted on the grouting diffusion law and the management effect. The results show that after the management, the low-resistance abnormal area within the working face range has basically disappeared, the water output verified by drilling has significantly decreased, the water inrush coefficient is less than the safety limit of 0.1 MPa/m, and an effective water barrier has been formed. The numerical simulation results show that the grouting pressure, water-cement ratio and slurry viscosity have a significant impact on the diffusion range of the slurry.