张集煤矿厚煤层下提高上限开采的研究与实践

Research and Practice of Raising Ceiling Mining in Thick Seam of Zhangji Coal Mine

张集煤矿通过对北一采区6煤层新生界松散层水文地质特征的分析研究,得出了第三系中部含水层下段为弱含水层,且底部粘土层为隔水层的结论。在此基础上对17116第一个厚煤层回采面成功地进行了留设37 m防水煤柱下的提高上限开采,取得了宝贵的开采经验和良好的矿井经济效益。

The analysis and research on the cenozoic loose layer hydrogeological characteristics of Zhangji Coal Mine the North No. 1 mining district 6 seam shows that the central third of the lower aquifer for the aquifer and the weak clay layer at the bottom impermeable layer for the conclusions. On this basis, the 17116 first- thick seam extraction is successful mined with retaining 37 m waterproof pillar under increasing ceiling. The precious mining experience and good economic effect are obtained.