开滦范各庄矿地下水氢氧同位素和水化学研究及其实际应用

通过范各庄老矿区地下水的氢氧同位素和δ¹⁸O值与Ca²⁺的活度积关系的研究,以及Na⁺、Ca²⁺和Mg²⁺浓度与其离子势关系的研究,可以判识各层地下水及其混合作用、地下水的补给和水力联系。

HYDROGEN-OXYGEN ISOTOPE AND HYDROCHEMICAL STUDIES AND THE APPLICATION IN GROUNDWATER IN FANGEZHUANG MINE, KAILUAN

Recognizing water from different aquifers is of great importance for water inrush control in coal mine. The studies of hydrogen-oxygen isotope of groundwater in Fangezhuang mine can divide the water samples into water stored in surface collapse, top water in alluvium, bottom water in alluvium, groundwater in Ordovician limestone and groundwater in coal-bearing strata. It is difficult to differentiate the groundwater in Ordovician from the bottom water in alluvium only by the δD value and δ¹⁸O value, but they can be differentiated by the relationship between the δ¹⁸O value and activity product of Ca²⁺ of water samples. Based on the plot of Na+, Ca²⁺ and Mg²⁺ concentrations against their ionic potentials(Z/r), water from different aquifers can be recognized, the mixing effect of groundwater can be studied also. The relationship between the δD value and δ¹⁸O value of water samples indicats that the ground-water of the mine was recharged by rainfall.