“天窗区”浅层地下水安全开采研究

Study on Safe Mining of Shallow Groundwater in"Skylight Area"

针对榆神府矿区某煤矿煤层开采遇"天窗区"导通浅层地下水,改变局部水文地质条件,影响煤矿安全开采的情况,通过Visual Modflow软件建立三维地下水非稳定流数值模型,预测浅层地下水通过"天窗区"对煤层开采涌水量的影响值。研究结果表明:第四系浅层含水层对2煤开采的矿井涌水量中补充的水量为3456.5 m^(3)/d,其中通过"天窗区"对2煤开采的矿井涌水量中补充的水量为2768.8 m^(3)/d;第四系含水层受"天窗区"影响较小,"天窗区"外的第四系含水层对煤层开采影响较小。研究结果为煤矿进行保水安全开采方案提供依据。

It is aimed at that"skylight area"channel the shallow groundwater in the coal seam mining of certain coal mine,change the local hydrogeological conditions,the situation of the influence of coal seam mining,through the Visual Modflow software to establish three-dimensional numerical model of unsteady flow of groundwater,prediction of the influence of shallow groundwater passing through the"skylight area"on the water inflow of coal mining.The results show that the water supplement of the Quaternary aquifer to the mine water inflow of 2 coal mining is 3456.5 m^(3)/d,among which the water supplement of the"skylight area"to the mine water inflow of 2 coal mining is 2768.8 m^(3)/d,and the Quaternary aquifer is less affected by the"skylight area"provide the basis for water-preserved mining plan of coal mine.