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立井过流砂层段施工,是当前国内外立井表土层段施工的难点。为解决鹤煤三矿新建副井表土层段含水流砂层施工过程中,遇到的含水流砂层埋深较深、水压较大、上距止浆垫远、含水流砂层厚度不明确等特殊因素,提出采用置换注浆法通过含水流砂层,并取得良好效果,对以后类似情况具有一定的指导意义。
The construction of over-flow sand shaft in vertical shaft is a difficult point in the construction of the surface layer of vertical well at home and abroad at present. In order to solve the problem that during the construction process of the aquiferous sand layer in the newly built auxiliary well of Heibei Coal Mine, the depth of the water-bearing sand layer encountered is deeper, the water pressure is larger, the distance from the grouting pad is far, and the thickness of the water-bearing sand layer is not clear Factors, proposed using displacement grouting through the aquifer layer, and achieved good results, for a similar situation after a certain guiding significance.