基于环境稳定同位素法分析煤矿开采对岩溶水的影响量

Analysis of the Influence of Coal Mining to the Karst Water Volume Based on Environmental Stabilization Isotope Method

针对煤矿开采对岩溶水资源造成的影响,以太原市西山某煤矿为例,综合采用硫、锶和氢氧同位素特征分析法,研究了岩溶地下水中同位素的主要来源和同位素演化的主要水岩相互作用,分析计算了矿坑水和矿区裂隙水中岩溶水的混合比例,定量评估了煤矿开采对岩溶地下水的影响量。结果表明:西山某煤矿矿坑水中岩溶水(含地表水)的比例为51%,裂隙水中岩溶水(含地表水)的比例为60%,据此计算得出煤矿开采影响岩溶地下水量为129.5万m^(3)/a。

In view of the serious impact of coal mining on karst water resources,this paper took a coal mine of Xishan in Taiyuan as an ex⁃ample and adopted the characteristic analysis method of sulfur,strontium and hydrogen and oxygen isotopes to study the main sources of iso⁃topes in karst groundwater,calculate the mine drainage and the mixing ratio of karst water in the fissure water in the mining area and quanti⁃tatively evaluate the impact on karst groundwater.The results show that in the coal mine in Xishan,the proportion of karst water(including surface water)in the mine drainage is 51%,and the proportion of karst water(including surface water)in the fissure water is 60%,and the amount of karst water affected by coal mining is calculated as 1.295 million m^(3)/a.