蒙陕接壤区纳林河二号矿井首采工作面顶板富水性探查

在充分掌握地质勘探资料的基础上，利用井下物探和钻探等技术，对鄂尔多斯盆地蒙陕矿区深埋煤层首采工作面顶板水文地质条件进行了深入研究。结果表明，31101工作面顶板导水裂缝带范围内共发育三层含水层，从下往上依次为3-1煤顶板含水层、2-1煤顶板含水层和直罗组下段含水层；富水区域主要分布于2-1煤层顶板到直罗组下段岩层之间，岩性为中粒砂岩、中粗粒砂岩。切眼附近和旧回撤通道附近钻孔涌水量和水压波动较大，这两个区域顶板水富水不均一性较明显；中间位置顶板含水层发育较稳定，钻孔涌水量和水压也相对稳定，富水性比较均一。井下物探在切眼附近和旧回撤通道附近圈定的低阻异常区，主要由地层岩性和富水性等引起。

Initial Working Face Roof Water Yield Property Exploration in Narin River No.2 Coalmine on Bordering Area of Inner Mongolia and Shaanxi

Based on intimate knowledge of geological data, using technologies of underground geophysical prospecting and drilling car-ried out detailed studies on deep buried coal seams initial working face roof hydrogeological condition of coal mining areas in the Ordos Basin on the bordering area of Inner Mongolia and Shaanxi. The result has shown that within the No.31101 working face roof water con-ducted zone totally developed 3 aquifers;from bottom to top namely coal No.3-1 roof aquifer, coal No.2-1 roof aquifer and Zhiluo For-mation lower member aquifer. The water rich zone is mainly distributed within the interval between coal No. 2-1 roof and Zhiluo Forma-tion lower member strata with lithology of medium to medium-coarse sandstone. Water inflow and pressure have rather large undula-tion in boreholes near the open-off cut and old dismantling roadway, water yield properties of roof aquifer in these two areas have rather obvious inhomogeneity;roof aquifer in the middle part developed stably with relatively stable borehole water inflow, pressure and ho-mogenous water yield property. Low-resistivity anomalies near open-off cut and old dismantling roadway delineated by underground geophysical prospecting are resulted from strata lithology and water yield property.