郭家河煤矿水文地质特征及矿井涌水量预测

Hydrogeological characteristics and prediction of mine in flow in Guojiahe Coal Mine

矿区位于鄂尔多斯盆地南部渭北挠褶带北缘,含煤地层主要为侏罗系中统延安组,可采煤层有2号、3号煤层。矿区含水层主要为第四系孔隙—裂隙潜水含水层,白垩系下统洛河组砂岩、宜君组砾岩孔隙—裂隙含水层,侏罗系中统直罗组砂岩裂隙、延安组煤层及其顶板砂岩裂隙含水层。井田受导水裂隙带影响,地下水以离层水形式参与工作面涌水。采用解析法进行矿井涌水量预测,预测2022—2025年郭家河煤矿1310工作面和2308工作面回采期间,矿井正常涌水量为225.17 m^(3)/h。依据经验,为防灾考虑,矿井最大涌水量按正常涌水量的2倍预计,矿井最大涌水量为450.34 m^(3)/h。研究可为矿井水文地质评价及水害防治提供依据。

The mining area is located in the northern margin of Weibei flexural fold belt in the southern Ordos Basin.The coal-bearing strata are mainly Jurassic Middle Yan′an Formation,No.2 and No.3 coal seams are available.The aquifers in the mining area are mainly Quaternary pore-fissure phreatic water aquifers,Cretaceous Lower Series Luohe Formation sandstone and Yijun Formation conglomerate pore-fissure aquifers,Jurassic Middle Series Zhiluo Formation sandstone fissure aquifers,Yan′an Formation coal seam and roof sandstone fissure aquifers.The minefield is affected by the water conducting fracture zone,and the groundwater participates in the water inflow of the working face in the form of separated layer water.In this paper,the analytical method is used to predict the mine water inflow,and the normal mine water inflow is predicted to be 225.17 m^(3)/h during the mining period of No.1310 working face and No.2308 working face in Guojiahe Coal Mine from 2022 to 2025.According to experience,in order to prevent disaster,the maximum mine water inflow is expected to be 450.34 m^(3)/h as twice as the normal water inflow.It provides the basis for mine hydrogeological evaluation and water hazard prevention.