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南京石膏矿(以下简称石膏矿)为一巨厚层状硬石膏矿床。矿山开始建设时,地质勘探工作尚在进行,矿区水文地质条件还未查清,曾施工了竖井和斜井各一对。1973年上半年一号竖井发生了突水事故,涌水量达300米~3/小时,井筒被迫报废,引起了有关部门对水文地质勘探工作的重视。现已基本查清石膏矿乃是一个地下水补给范围大、透水性能好、水量丰富的岩溶充水矿床。因此拟定适合这种矿层巨厚、矿石价廉、水文地质条件复杂矿床的治水方法,影响极大。采用以“矿层隔水”为主的方法,防治矿床地下水,在现阶段已收到一定成效,并为矿山基建和试生产所证实。现将情况简介如下。
Nanjing gypsum mine (hereinafter referred to as gypsum mine) is a huge thick layered anhydrite deposit. When the mine started construction, the geological exploration work is still going on. The hydrogeological conditions of the mine have not been ascertained. One pair of shaft and inclined shaft have been constructed. In the first half of 1973, there was a water inrush accident on shaft No. 1, with a water inflow of 300 m 3 / h. The wellbore was forced to scrap, causing the relevant departments to attach importance to hydrogeological exploration work. Gypsum mine has now basically been found to be a large supply of groundwater, water permeability, water-rich karst waterflooding deposit. Therefore, it is very influential to formulate a water treatment method suitable for such a huge deposit with high ore thickness, low ore cost and complex hydrogeological conditions. Adopting the method of “mine water separation” as the main method to prevent and control the underground water of the deposit, it has received some achievements at this stage and is confirmed by the mine infrastructure and trial production. Now the situation is as follows.