大海则煤矿顶板富水含水层下开采水害防治研究

为了解决顶板富水含水层下开采过程中所面临的水害问题，以侏罗纪煤田榆横北区大海则煤矿为例，通过分析矿井水文地质条件，确定了主要充水水源和充水通道，计算了防隔水煤（岩）柱留设宽（厚）度，并预测了矿井开采2号煤层时的涌水量，提出了相应的防治措施。结果表明:矿井开采2号煤层时，其主要充水水源为煤层顶板侏罗系延安组、直罗组含水层水，主要充水通道为覆岩导水裂隙带。通过计算防隔水煤（岩）柱留设宽（厚）度，分析判断其在现有2号煤层开采条件下，不会受到顶板白垩系洛河组强含水层影响。采用解析法和数值法进行矿井涌水量预测，取其算术平均值作为参考。结合矿井条件和现场实际，提出井下钻探、地球物探、水文地质监测等综合防治措施，通过预防、探查、疏排、监测等手段，共同解决矿井水害问题。

Research on prevention and control of water hazards in mining under water-rich aquifers of the roof in Dahaize Coal Mine

In order to solve the problem of water hazards in the mining process under the roof water-rich aquifers，taking Dahaize Coal Mine in north Yuheng mining area of Jurassic coalfield as an example.Through the analysis of the hydrogeological conditions of the mine，the main water filling source and water filling channel are determined，the width（thickness） degree of the reserved water-proof coal pillar is calculated，and the water inflow during the mining of No.2 coal seam is predicted，and the corresponding prevention measures are put forward.The results showed that when mining No.2 coal seam，the main water filling source is the aquifers water of Jurassic Yan′an Formation and Zhiluo Formation in the roof of coal seam，and the main water filling channel is the overburden water flowing fractured zone.By calculating the width（thickness） degree of retaining pillar of water-proof coal and rock，it is analyzed and judged that it will not be affected by the strong aquifers of Cretaceous Luohe Formation under the mining condition of No.2 coal seam.The analytical method and numerical method are used to predict mine water inflow，and the arithmetic mean value is taken as a reference.Combined with mine conditions and field practice，comprehensive prevention and control measures，such as underground drilling，earth geophysical exploration，hydrogeological monitoring，etc.，are proposed to jointly solve the mine water hazards by means of prevention，exploration，drainage and monitoring.