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distant discharge
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  distant discharge
TCE has been observed in the Crouch Branch Middle Sand, where it presumably will flow to distant discharge locations.
      


In order to recognize the water bursting sources of the mine accurately, using the long observation holes of the groundwater and the distant-discharge holes of the mine in each aquifer distributed in the mining area in northern Anhui, the sampled water in four main deep groundwater (the fourth aquifer, the coal measures, the Taiyuan limestone aquifer and the Ordovician limestone aquifer) was extracted the content of the oxygen and hydrogen stable isotopes (δ18O、δD) was measured, to research their...

In order to recognize the water bursting sources of the mine accurately, using the long observation holes of the groundwater and the distant-discharge holes of the mine in each aquifer distributed in the mining area in northern Anhui, the sampled water in four main deep groundwater (the fourth aquifer, the coal measures, the Taiyuan limestone aquifer and the Ordovician limestone aquifer) was extracted the content of the oxygen and hydrogen stable isotopes (δ18O、δD) was measured, to research their composing and drifting features. The research result is that: 18O drift is the main features in the fourth aquifer, but a few spots express a definite drift feature of D; on the contrary, D drift is the main features in the coal measures; the drift features of the Taiyuan limestone aquifer and the Ordovician limestone aquifer are similar, as the 18O drifted, the D drift is formed. The generative mechanisms for D and 18O different drift features were the silicate exchange, the hy-droxyl exchange and the action of old lixiviation infiltration water.

为了准确识别矿井突水水源,利用分布于皖北矿区内的各含水层地下水长观孔和矿井各含水层疏放孔,采取4个主要深层地下水样(四含水、煤系水、太灰水和奥灰水),测定其氢氧稳定同位素含量(δ18O、δD),研究它们的组成特征及漂移特征.研究结果表明:四含水以18O漂移为主,少数样点表现了一定的D漂移特征;相反,煤系水以D漂移为主要特征;太灰水和奥灰水同位素漂移特征相似,在产生18O漂移的同时,也产生了D漂移.D、18O不同类型漂移特征的形成机理是硅酸盐交换、烃基交换和古溶滤渗入水作用.

 
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