为防止煤层回采过程中地表水通过导水裂缝带流入井内,威胁矿井安全,基于神府矿区柠条塔煤矿N1201工作面新民沟区域富水区水文地质条件,运用经验公式计算出该工作面回采后,工作面上方地表河流段会形成塌陷区,塌陷后的导水裂缝带高约60 m,使工作面与地表相贯通,通过SF6气体试验得以证实。为此采用在井下设置排水仓、地表安设排水管道、河道裂缝处开挖充填等综合技术防止地表水向井下下渗,结果表明,回采过程中工作面涌水量仅较原来增加了4.7m3/h,实现了穿越河道浅埋煤层安全开采。

In order to prevent the surface water rushed into the mine through the water flow fissure zone during the seam mining operation to threaten the mine saf ety, based on the hydrological investigation conducted on the watery zone of Xinmingou Area for No.1201 coal mining face in Ningtiaota Mine of Shenfu Mining Area, th e calculation with the experience formula showed that after the mining of the coal mining face, the river section of the surface ground above the coal mining face would be formed as a subsidence area. After the subsidence occurred, the height of the water flow cracking zone would be about 60 m and the water flow from the surface gro und to the coal mining face would be connected.The SF6 gas experiment showed that the water drainage sump set in the underground mine, the water drainage pipelin e set on the surface ground, the excavation and backfill of the river course and other comprehensive technology could be applied to prevent the surface ground water ru nning into the underground mine.The results showed that during the mining process, the water inrush value in the coal mining face was 4.7 m3/h higher than the previo us coal mining face.Thus a safety mining in the shallow depth seam was conducted passing through the river bed.