沁水煤田固县勘查区地下水化学特征及含水层间水力联系分析

Analysis of Groundwater Hydrochemical Features and Hydraulic Connection Between Aquifers in Guxian Exploration Area of Qinshui Coalfield

依据勘查区水文地质钻探、野外抽水和水质化验资料,重点对勘查区主要可采煤层3号和15号煤层影响较大的下石盒子组及山西组砂岩裂隙含水岩组、太原组砂岩裂隙及石灰岩岩溶裂隙含水岩组和奥陶系中统石灰岩岩溶裂隙含水岩组进行了水化学特征和含水层间水力联系分析研究。结果表明:勘查区各含水层之间的水力联系均较弱,但在构造影响区域水力联系有相对增强的趋势;奥陶系岩溶裂隙含水层的水化学特征与其埋深、构造发育程度有着密切的关系,总体随着埋深的SO42-、矿化度相应增加,径流条件逐渐变差;同时分析得出勘查区3号煤层、15号煤层均处于带压状态,对未来煤炭资源开采过程中的防治水工作有较大的参考价值。

According to hydrogeology drilling,water pumping and water quality data from exploration area,this research focus on major minable coal seams（ No. 3 and 15 coal seam） which had great influence on Xiashihezi and Shanxi Formation sandstone fissure aquifer,Taiyuan Formation sandstone and limestone karst fissure aquifer and middle Ordovician limestone karst fissure aquifer hydrochemical features and hydraulic connection analysis. The result show that hydraulic connection between the aquifer are rather weak in exploration area,but relatively strong in construction affected area. Hydrochemical Features of the Ordovician limestone karst fissure aquifer has great relationship on its depth and degree of construction development,with the increasing in depth SO42-and mineralien increase accordingly,the condition of runoff becomes worse. This study shows No. 3 and 15 coal seam are all under water pressure,which need much attention in water hazard controlling during coal mining in future.