中煤平朔三号井工矿水化学特征及对水文地质条件的反映

中煤平朔三号井工矿在建井过程中曾发生了两次较大的突水事件。在分析矿区水文地质条件的基础上,采用衬度系数方差分析了矿区内地表水、第四系松散层孔隙水、石炭—二叠系砂岩裂隙水和矿井水的水化学特征,对直接充水水源——石炭—二叠系砂岩裂隙水的水化学类型、矿化度和主要污染组分的空间分布特征及水动力条件进行了探讨。研究结果表明,三号井工矿水化学特征能够较好地反映水动力条件和富水性：在井田西部靠近大沙沟的隐伏露头部位,由于地表水及第四系地下水补给强度大,径流条件好,水交替积极,水质较好;而在远离隐伏露头补给区,即井田东部及东北大部风化裂隙减弱,径流条件逐渐变差,水交替迟缓,水中各离子含量相对增高,水质变差。研究成果可为矿井防治水提供依据。

Mine Water Chemical Characteristics in China Coal Pingshuo No.3 Underground Coalmine and Their Hydrogeological Condition Reflections

Two times of major water bursting have been happened during the construction of the China Coal Pingshuo No.3 underground coalmine.Based on mine area hydrogeological condition analysis,analyzed chemical characteristics of surface water,Quaternary loose bed pore water,Permo-Carboniferous sandstone fissure water and mine water through contrast coefficient analysis of variance,and discussed hydrochemical type,total dissolved solid and main polluting components spatial distribution characteristics and hydrodynamic condition of the direct water filling source-Permo-Carboniferous sandstone fissure water.The result has demonstrated that the No.3 coalmine mine water chemical characteristics can reflect hydrodynamic condition and water yield property better.In the western minefield near the Dashagou subcrop part has better runoff condition,active water alternation and good water quality because of strong replenishment of surface water and Quaternary groundwater.While far away from subcrop recharging area,that is eastern and large part of northeastern minefield,since weakening of weathering fissures,runoff condition getting poorer,water alternation tardier,ion concentration in water is relatively increased,thus water quality getting poorer.The result can provide the basis in coalmine water controlling.