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河南省某煤矿的6#工作面靠近断层发育带,底板隔水层较薄且地下水丰富,煤层开采之后,底板临空并失去上覆压力,在下部强大的承压水压力作用下,底板隔水层被压裂,从而诱发透水事故。为了继续开采该块段保有的100万t煤炭,在地表平行和垂直F20断层布设了12条测线,勘测场地岩层分布情况以及二1煤层底板与F20断层交点的准确位置;然后对6#工作面的底板进行地面注浆止水处理,止水效果达到99.17%。
The 6 # face of a coal mine in Henan Province is close to the fault zone, the floor aquifuge is thin and the groundwater is abundant. After the coal seam is mined, the floor runs short of air and loses overburden pressure. Under the strong pressure of the lower confined water, The water layer is fractured, causing water seepage. In order to continue the exploitation of 1 million tons of coal retained by this block, 12 survey lines were laid in the horizontal and vertical F20 faults, the distribution of rock formations in the survey site, and the exact location of the intersection between the floor of the No. 2 coal seam and the F20 fault. Then, Surface of the floor grouting grout water treatment, sealing effect of 99.17%.