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一、工程概况 兖州东滩西风井井深695m,其中表土为134.8m,上侏罗系砂岩为470.9m,煤系地层为89.3m。上侏罗系在垂深474.8～485.4m为富含水区,其间见一小逆断层,并有6条与断层平行的裂隙,其宽为8～30mm,无充填物,顺裂隙冒水,岩性为紫红色粗砂岩。施工中富水区最大涌水量为55.4m~3/h,采取强排措施及辅助防治的方法,排水用2台80DGL—75×7型吊泵,临时支护采用网喷,喷厚为100mm,永久支护采用液压滑模套壁,壁厚为400mm。 二、水的防治方法 1.临时支护中导水 喷浆前在井帮出水处上方用黄泥糊上人字型的堰,把井帮淋水分向两边,然后将导
First, the project profile Yanzhou Dongtan westerly wells 695m, of which surface soil is 134.8m, the Upper Jurassic sandstone 470.9m, coal-bearing strata of 89.3m. The Upper Jurassic is rich in water at the depth of 474.8 ~ 485.4m, with a small thrust fault and 6 fractures parallel to the fault with a width of 8 ~ 30mm, without filling, Lithology is mauve coarse sandstone. The maximum inflow of water in the construction area is 55.4m ~ 3 / h. With strong drainage measures and auxiliary control methods, two 80DGL-75 × 7 hanging pumps are used for draining. The net support for temporary support is 100mm, Permanent support using hydraulic sliding wall, wall thickness of 400mm. Second, the prevention and treatment of water 1. Temporary support in the water before the shotcrete in the well to help out of water at the top with a yellow mud on the herringbone weir, the well to help watering points on both sides, and then guide