淮北矿区五沟煤矿太原组上段灰岩岩溶裂隙水富水性及径流特征

五沟煤矿太原组上段灰岩岩溶裂隙水是矿井主采煤层（10煤）的主要充水含水层。通过对矿区水文地质边界条件、地面抽水试验和井下放水试验的分析,认为矿区水文地质边界受制于周边的较大型隔阻水断层,从而形成了较封闭的地下水系统;太原组上段灰岩含水层的富水性在平面上具有不均一性,在垂向具有随着深度的增加,岩溶发育有减弱的趋势,基本上属弱富水含水层,仅在局部构造发育带为中等富水含水层。利用利用surfer软件,绘制出矿区太原组灰岩水位等值线图;从图上可以看出,矿区目前太原组含水层水位标高总体呈北高南低,中间高两边低的态势,并在井田西南部形成以水5孔及J5-1孔为中心的低水位区。该研究对目前矿井防治水工作具有重要的指导意义。

Taiyuan Formation Upper Member Limestone Karst Fissure Water Yield Property and Runoff Characteristics in Wugou Coalmine,Huaibei Mining Area

The Taiyuan Formation Upper Member limestone fissure water aquifer in the Wugou coalmine is the main water filling aquifer of the main mineable coal seam（No.10 coal）.After analyzed the mine area hydrogeological boundary conditions,and data of surface pumping test and underground dewatering test,considered that mine area hydrogeological boundary is limited to circumjacent larger watertight faults,so that formed a relatively closed groundwater system.Water yield property of Taiyuan Formation Upper Member limestone aquifer is provided with planar inhomogeneity,vertically,along with depth deepening,karst development has a weakening trend,thus basically a weak water yield aquifer,only in local structure developed zone is medium water yield aquifer.Using the SURFER software has mapped out mine area Taiyuan Formation limestone water level isogram.From the map can see current mine area Taiyuan Formation aquifer water level elevation presents high in north and low in south,high in center and low in both sides as a whole,and formed a low water level area in southwest part of the minefield center around boreholes Shui No.5 and J5-1.