矿井瞬变电磁法在煤层顶板富水异常区探测中的应用

Application of Mine Transient Electromagnetic Method to Detect Watery Abnormal Zone in Seam Roof Strata

一直以来,煤层顶板水害对红柳林煤矿安全生产构成了严重威胁,为保证5号煤层工作面安全回采,必须在开采前期查明顶板基岩层导、含水构造及其富水性。基于此,文章结合矿井瞬变电磁法对低电阻率地层有反应敏感、分辨率高及探测深度大等优点,查明了红柳林矿15204工作面顶板导、含水构造,圈定了富水异常区,并在工作面回采前,通过对15204工作面顶板基岩存在的富水异常区1和异常区2打钻放水验证可知,该次矿井瞬变电磁法所取得的成果与现场实际水文地质情况相符,对该矿区今后顶板水害防治技术提供了科学依据,具有一定的指导意义。

For a long time, a water disaster from the seam roof caused a serious threat to the mine safety production in Hongliulin Mine, in order to ensure a safety mining of No. 5 seam, the water flow structure, water bearing structure and watery features of the roof base rock stratum should be detected before the coal mining operation conducted. Base on the circumstances, in combination with the mine transient electromagnetic method with a reaction sensitivity of the low resistivity strata, high resolution, deep detection depth and other advantages, the water flow and water bearing structures of the roof above No. 15204 coal mining face in Hongliulin Mine were detected and the watery abnormal zone was pointed out. Before the mining operation of the coal mining face conducted, the drilling and water drainage conducted in the watery abnormal zone 1 and the watery abnormal zone 2 existed in the roof strata above No. 15204 coal mining face showed that the achievements of the mine transient electromagnetic method were the same to the site actual hydrological conditions and could provide the scientific basis and certain guidance mans to the future roof water disaster prevention and control technology in the mining area.