朝川煤矿一井水文地质分析

Analysis on the Hydrogeology of No.1 Mine of Chaochuan Coal Mine

朝川一井水文地质条件复杂,水害问题严重。朝川矿区出露有古生界寒武系、石炭系、二叠系、新生界第三系、第四系,己16-17煤为主要可采煤层。朝川矿区位于李寨断层、上石灰窑断层和刘洼断层将矿区切割成三角形断块,断层影响矿区水文地质条件。矿井水兼有砂岩水和岩溶水水化学特征,水中SO42-含量比典型岩溶水和砂岩水都高。朝川一井煤层底板石炭系薄层灰岩岩溶裂隙发育,富含岩溶水,水压高,石炭薄层灰岩和寒武系灰岩水力联系密切。防治水实践表明,以疏水降压为核心的综合防治水技术措施,对于实现复杂水文地质背景下安全生产起到了重要作用。

No.1 Mine of Chaochuan Coal Mine has a complex hy-drogeological condition, and the problem of water damage is seri-ous. Chaochuan Coal Mine has exposed Paleozoic Cambrian, Carboniferous, Permian, Cenozoic Tertiary and Quaternary, and Ji16-17 coal is the main minable seam. Chaochuan Coal Mine is lo-cated in the triangular block cut by Lizhai fault, Shangshihuiyao fault and Liuwa fault, and the faults influence the hydrogeological conditions of the coal mine. Mine water possesses the chemical characteristics of both sandstone water and karst water, and SO42-content in water is higher than that in typical karst water and sandstone water. Limestone karst fissures at Carboniferous thin seam develop at the coal seam floor of No.1 Mine of Chaochuan Coal Mine, with rich karst water and high water pressure, and the hydraulic connection is close between Carboniferous thin seam limestone and Cambrian limestone. Water control practice shows that the integrated technical measure for water control centered by hydrophobic depressurization plays an important role in real-izing safe production in the complex hydrogeological context.