采矿对山西水资源破坏过程的同位素示踪研究

综合应用水文地质勘察、同位素示踪、水化学信号等研究方法,揭示采矿活动对山西水资源的破坏过程机理.结果表明:山西矿区矿坑水为Na-Ca-SO4型水,δ18O和δD为-9.34×10-3~-9.78×10-3,-66.14×10-3~-68.91×10-3,矿区矿坑水、孔隙水、河水和浅层岩溶水聚集,存在显著的补给排泄关系,矿坑水主要由浅层岩溶水、孔隙裂隙水和河水混合补给形成.采矿活动对浅层岩溶水、孔隙裂隙水以及河水的破坏甚为严重,而对深层岩溶水与水库水影响甚微,以上示踪得出结论与实际情况及物探结论基本吻合,研究可为类似矿区水资源安全利用等提供参考.

Water resource destruction processes of mining in Shanxi province combining isotopic and hydrochemical tracer

The objectives of this study were to reveal the destruction process mechanism of mining on water resources in the Shanxi province, based on the multi-discipline method of hydrogeology survey, isotopic, hydrochemical, etc. The chemical composition of pit water was the Na-Ca-SO4type, δ18O ranged from-9.34×10-3to -9.78×10-3, δD ranged from -66.14×10-3to -68.91×10-3, showed the clustering together of the data for pit water, rivers water, shallow karst and pore water, which indicated the hydraulic relationship of recharge and discharge exists among them. Pit water was mainly recharged by rivers water, Shallow karst and pore water. shallow karst, pore water and rivers water were destructed seriously by mining, but deep karst water and reservoir water were not seriously destructed. Above concluded were basically coincided with the results of actual situation and the geophysical exploration. This study can provide scientific basis for the safety use of water resources in similar mine.