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对袁大滩煤矿首采区煤层顶板水文地质特征进行了研究。结果表明:该矿井2#煤开采后,个别钻孔导水裂缝带发育高度将到达直罗组上段,但是不会沟通第四系含水层;直罗组与第四系之间存在隔水性能较好的相对隔水层,与2-3-1煤间含水层水力联系也较弱,粉-细砂岩层具有一定隔水能力;上部含水层补给、径流条件较好,循环交替活跃;下部含水层径流条件较差、交替缓慢;含水层比较容易疏降,但是含水层渗透系数较小,透水性较弱,矿井顶板含水层疏降周期会比较长。
The hydrogeological characteristics of the coal seam roof in the first mining area of Yuandatan coal mine were studied. The results show that after the mining of No.2 coal in the mine, the developmental height of individual aqueduct fractures will reach the upper part of Zhiluo Formation, but will not communicate with the Quaternary aquifer. There is water-barrier property between Zhiluo Formation and Quaternary The better relative aquitard has weak hydraulic connection with 2-3-1 coal between aquifers, and the powder-fine sandstone layer has a certain water-barrier capacity. The upper aquifer recharge, runoff conditions are good, the cycle alternating active; the lower Aquifer runoff conditions are poor, alternately slow; aquifers easier to drain, but the aquifer permeability coefficient is small, permeability is weak, mine roof aquifer dredging cycle will be longer.