长平矿煤层开采水害影响评价及防治

Influence evaluation and control of water hazard in Changping Coal Mine

为缓解长平煤矿主采3号煤层的瓦斯压力问题,拟开采其下方的8号煤层作为解放层。该煤层位于石炭系太原组上部,煤层顶板含水层主要为石炭系太原组K5与K6灰岩,底板依次为K4、K3、K2和奥陶系灰岩。其中奥陶系灰岩,不仅厚度大,而且富水性好,是8号煤层开采的主要水患。通过对煤层开采水害影响进行评价,制定了相应的防治水对策与技术措施。

To alleviate the high gas pressure No. 3 coal seam of Changping Coal Mine, the coal mine planned to mine the lower No. 8 coal seam as liberation seam, which located at the upper part in Taiyuan formation of Carboniferous system. As the Ordovician limestone has large thickness, and bears rich water, which constitutes main flood threat of No. 8 coal seam mining. The coal mining influence on water hazard was evaluated, and the corresponding water prevention and control countermeasures and technical measures were formulated.