综合物探技术在煤矿巷道底板富水区勘探中的应用效果分析

徐州市西北地区山西组7;煤开采受底板L4灰岩影响,易发生底板突水事故,为了迅速达到疏水释压效果,需综合利用超高密度电法和矿井瞬变电磁法物探手段对某工作面巷道底板进行探测,圈定相对富水区,探测结果表明,超高密度电法在垂向上较好解释了巷道底板下L4灰岩界面起伏形态,瞬变电磁法在横向上较好解释了L4灰岩富水区,成果经排水孔验证,效果理想,达到探测目的.

The Application of Multi-geophysical Methods to Exploring Coal Mine Roadway Backplane and Its Effect

The backplane water flooding problem occasionally occurs during the 7^# coal rain ing at North-western region of Shanxi Group, Xuzhou City. The reason is that there are some water-rich regions in L4 Limestone beneath the coal mine roadway. The backplane water flooding problem can be solved by releasing hydraulic pressure of the L4 Limestone water rich region beneath the coal mine roadway. In order to identify the location of water rich region, two geophysical methods were used to survey the coal mine roadway. They are Comprehensive Array Oriented Resistivity （CAOR） method and Transient Electro-Magnet- ics （TEM） method. The survey results show that CAOR method is reasonably good at de lineating the shape of the undulating plains of L4 Limestone beneath the coal mine roadway in the vertical direction and TEM method is reasonable good at identifying the location of water-rich region in L4 Limestone in the horizontal direction. According to the results, wa- ter drainage holes were drilled and hydraulic pressure was released from these regions suc- cessfully.