Inthe process of Shanxi formation seamminingin Shaqu Colliery, theseam roof and floor sandrock aquifers constitute the direct discharge aquifers.
沙曲煤矿山西组煤层开采过程中,煤层顶底板砂岩含水层构成煤层开采时的直接充水含水层。
2
The method and measure to detect the fault and coal seamin construction of No 12 mining area in the Chen Mine, Yongcheng is introduced.
介绍了在永城车集矿12采区工程施工中,如何解决井下探测断层与煤层的方法与措施。
3
This paper mainly researches on the technique of draining long distance pressure relief gas in bed plate tunnel under the circumstance of mining protective coal seam.