An iron ore shaft in Hebei was constructed by drilling. After removal of steel casing in the shaft, water leaked around the shaft wall.
河北省某铁矿竖井采用钻井法施工，拆除井筒钢护壁后出现井筒漏水。
An iron ore shaft in Hebei was constructed by drilling. After removal of steel casing in the shaft, water leaked around the shaft wall.
河北省某铁矿竖井采用钻井法施工，拆除井筒钢护壁后出现井筒漏水。
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