涡北煤矿851工作面“四含”注浆改造工程应用及治理效果评价

Application and Treatment Effect Evaluation of “Fourth Aquifer” Grouting Reconstruction Project in 851 Working Face of Guobei Coal Mine

摘要: 为防控“四含”下开采引发的水害风险，本文以涡北煤矿851工作面为例，设计施工“四含”注浆改造工程及井下探放水工程，基于注浆及井下探放水工程成果，从浆液扩散距离、“四含”、风化带、断层水文地质性质、井下探放水等方面进行多维度验证，综合评价“四含”注浆改造治理效果，结果表明：该注浆改造工程有效阻断了“四含”水渗流通道，降低了含水层富水性，实现了“四含”水害的精准治理，并形成了可供借鉴的多维度注浆改造效果评价体系，为类似松散含水砂层工作面的注浆改造提供了技术参考与工程示范。

Abstract: To address the water hazard risk induced by mining under the “Fourth Aquifer” (abbreviated as “Sihan”), this paper takes the 851 Working Face of Guobei Coal Mine as an example, designing and constructing the “Sihan” grouting reconstruction project and underground water exploration and drainage project. Based on the achievements of the grouting and underground water exploration and drainage projects, multi-dimensional verification is conducted from aspects of grout diffusion distance, hydrogeological properties of the “Fourth Aquifer”, weathered zone and faults, as well as underground water exploration and drainage. A comprehensive evaluation of the treatment effect of the “Fourth Aquifer” grouting reconstruction is carried out. The results show that the grouting reconstruction project has effectively blocked the seepage channels of “Fourth Aquifer” water, reduced the water abundance of the aquifer, and achieved precise control of the “Fourth Aquifer”water hazard. Furthermore, a referable multi-dimensional evaluation system for grouting reconstruction effect has been formed, providing technical reference and engineering demonstration for the grouting reconstruction of working faces in similar loose water-bearing sand layers.