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一、概况 五矿-125水平东翼石门FD10孔,于79年2月施工,孔深78.55米,层位为大青灰岩含水层,当时水压25Kg/cm~2,涌水量为3.6米~3/分,Φ108m/m套管长度为18.35米。后由于该孔受开采矿压作用造成孔内套管断裂,巷道底板岩层产生裂隙,于81年6月19日钻孔四周底板大量跑水,水压为22Kg/cm~2,涌水量为2.6～2.8米~3/分,影响大巷运输和生产。钻孔水基本上全部从巷道底板涌出并无法控制,造成矿井无效排水,仅增加排水电费每月达16,740余元。所以从6月下旬,我
First, an overview Minmetals -125 level East wing Shimen FD10 hole, in February 79 construction, hole deep 78.55 meters, the horizon for the aquamarine aquifer, when the water pressure 25Kg / cm ~ 2, the influx of 3.6 meters ~ 3 / min, Φ108m / m casing length of 18.35 meters. After the hole by the mining pressure caused by the hole casing casing rupture, roadway rock floor cracks, in June 19, 81 drilling around the floor a large number of running water, water pressure of 22Kg / cm ~ 2, the influx of 2.6 ~ 2.8m ~ 3 / min, affecting the lane transport and production. Basically, all the borehole water can not be controlled from the floor of the roadway, resulting in ineffective drainage of the mine. Only the drainage electric charges are increased by 16,740 yuan per month. So from the end of June, I