龙泉井田4号煤层开采水文地质条件分析

Mining Hydrogeological Condition Analysis of No.4 Coal Seam in Longquan Well Field

龙泉井田主要含煤地层为石炭系太原组,4号煤层为首采煤层。通过分析,认为对4号煤层开采系统有充水影响的主要水源为二叠系下统山西组及下石盒子组含水层。在有断层、陷落柱等导通的情况下,太原组灰岩水及奥陶系灰岩水会对煤层产生间接充水。预测开采4号煤层时正常涌水量为13 203 m3/d,并提出了开采4号煤层的主要水害防治措施。

The main coal - bearing strata of the Longquan well field belong to the Taiyuan formation of Carbonifer- ous system. No. 4 coal seam is the first mining coal seam. Through the analysis, the main source of water that has influ- ence on the system of mining in No. 4 coal seam is lower Permian Shanxi formation and lower Shihezi formation aquifer. When there is fault and collapse column, Taiyuan group limestone water and Ordovician limestone water will have the indirect water filling on the coal seam. The predicted normal water inflow of mining No. 4 coal seam is 13 203 m3/d, and puts forward major water damage prevention and control measures for mining No. 4 coal seam