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防水闸墙(门)是矿井防治水患中一项重要安全措施,有水患威胁的矿井都在采用。抚顺胜利矿头顶露天矿大坑,每年雨季有数十万m~3的水汇集在坑底,以每min50m~3的涌水量进入井下。平时井下旧采迹的自然涌水量为每min20~3左右。这些水达到静水压力时为1～4.5MPa。为防水患建防水闸墙一百多个。井下水通过旧采迹流出后大部分都含有硫酸根离子(SO_4~(2-))。个別地区高达809.97mm/L。由于水中有过多的硫酸根离子,它与氧化钙作用生成结晶的硫酸钙(CaSO_4),这时体积增大,在孔隙内产生膨胀压力,破坏混凝土,称为结晶性侵蚀。由于井下防水闸墙受结晶性侵蚀,有的
Waterproof gates (gates) are an important safety measure in the prevention and control of flooding in mines. Mines that are threatened by flooding are used. Fushun Shengli Mine open pit mine pit, the annual rainy season there are hundreds of thousands of m~3 water pooled in the bottom of the pit, with per min50m~3 of water inflow into the underground. The natural amount of water in the old underground mines is about 20 to 3 per minute. When these waters reach the hydrostatic pressure, they are 1 to 4.5 MPa. More than 100 waterproof gates have been built for waterproofing. Most of the downhole water flowing through the old traces contains sulfate ions (SO_4~(2-)). Up to 809.97mm/L in individual areas. Because there is too much sulfate ion in the water, it reacts with calcium oxide to form crystalline calcium sulfate (CaSO 4 ). At this time, the volume increases, and expansion pressure is generated in the pores, destroying the concrete, which is called crystalline erosion. Due to the crystalline erosion of underground waterproof gates, some