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新疆北部某铜镍矿新建主、风两个竖井。其中风井净径3米,混凝土井壁,厚为250毫米,井筒全深285.6米。由于水文地质条件不清,先后在24米水平及65米水平两处迂到大的涌水,涌水量为20(米~3/时),给井筒施工带来严重困难,井筒的涌水大部分从井壁接茬口处涌出,小部分由井壁薄弱处孔洞涌出。为井筒创造正常施工条件,决定采用水泥、水玻璃双液壁后注浆,以封堵涌水。注浆前,首先破除接茬口不符合质量要求的混凝土,沿接茬缝周边,在适当位置上预埋4根泄水管,以便在浇灌混凝土接茬口过程中泄出涌水,以利施工。泄水管一端顶住岩帮,外露的另一端带有丝扣,便于安装泄水闸阀。
A copper-nickel mine in northern Xinjiang newly built main wind two shafts. Among them, the air shaft has a net diameter of 3 meters, a concrete shaft wall with a thickness of 250 mm and a well depth of 285.6 meters. Due to the unclear hydrogeological conditions, large gushing water flowed 20 meters (meters to 3 times per hour) at two levels of 24 meters and 65 meters. This caused serious difficulties in wellbore construction. Most of the well water from the wells Well wall next to stubble Department gush, a small part of the wall hole weak hole gushing. For the well to create normal construction conditions, decided to use cement, water glass double wall after the grouting, in order to plug gushing water. Prior to grouting, the concrete that fails to meet the quality requirements shall be dismantled first and the four drains shall be embedded along the joint stubble in proper position so as to discharge water during the pouring of concrete, in order to facilitate the construction. One end of the drainage pipe to withstand rock help, exposed the other end with threaded, easy to install the sluice gate valve.