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一、问题的提出超化煤矿目前主副井已经落底,正进入二期工程,井田面积8.1平方公里,设计能力90万吨/年,服务年限75.48年。85年2月6日东风井正前-10水平突水226米~3/时,淹井影响生产20天,经济损失达15万元之多。根据水文地质报告,批准矿井正常涌水量为1000米~3/时,最大涌水量1500米~3/时。主要可采煤层二_1煤下距L_(7—8)灰岩含水层5.65～12.86米,隔水层岩性为泥岩,砂质泥岩组成。根据理论公式计算此种岩层所需隔水层厚度应为14.11～19.14米。水平水压28千克力/厘米~2。根据矿井水文地质规程的有关规定,超化矿井修改初步设计,强调“在开采前必须对井田内各含水层采取疏干降压措施,以防工作面突水”(见设计报告)。水量大,水
First, the issue raised Chaohuai main and auxiliary shaft mine has bottomed out, is entering the second phase of the project, the area of 8.1 square kilometers, design capacity of 900,000 tons / year, service life of 75.48 years. On February 6, 1985, the Dongfeng well was bursting at a level of 226 m 3 / h before the level of -10 and the flooding well affected the production for 20 days with an economic loss of as much as 150,000 yuan. According to the hydrogeological report, it is approved that the normal water inflow in the mine is 1000m ~ 3 / h and the maximum water inflow is 1500m ~ 3 / h. The main coal seam two _1 coal from L7 (7-8) limestone aquifer 5.65 ~ 12.86 meters, aquifuge lithology mudstone, sandy mudstone composition. According to the theoretical formula to calculate the required aquifer thickness of the rock should be 14.11 ~ 19.14 meters. Horizontal pressure 28 kgf / cm ~ 2. According to the relevant provisions of the mine hydrogeological regulations, Chaohua Mine modified the preliminary design, emphasizing “the mining area must be taken before the aquifer dehydration and decompression measures to prevent surface water” (see the design report). Large amount of water, water