煤矿安全2024，Vol.55Issue(8)：175-183,9.DOI:10.13347/j.cnki.mkaq.20240725
基于水化学特征及抽(放)水试验的含水层垂向水力联系研究
Study on vertical hydraulic connection of aquifers based on hydro-chemical characteristics and pumping(discharging)water test
摘要
Abstract
The 3-1 coal in Xinjie Mining Area is buried deep,and the thick Zhiluo Formation and Zhidan Group aquifers are the main water-filled aquifers,and the hydraulic correlation between surface water and aquifers affects water inrush in the mine.Based on the hydro-chemical characteristics and the test of pumping(discharging)water,the vertical hydraulic connection of aquifer was carried out.The results of hydro-chemical tests and Piper chart show that the salinity of surface water,Zhidan Group and Zhiluo Formation aquifers increases gradually,and the hydro-chemical type changes from HCO3-Ca type to SO4-Na type.The analysis of Gibbs dia-gram and SOM model show that the ions in surface water mainly come from the weathering of carbonate rock and silicate rock,the ions in Zhidan Group aquifer and Zhiluo Formation aquifer mainly come from silicate rock and gypsum,and oxidation of metal sulf-ides is also exist in Zhiluo Formation aquifer.The controlling factor of hydro-chemical characteristics changes from water-rock inter-action to evaporation concentration,the Zhidan Group aquifer and Zhiluo Formation aquifer have strong cation alternation.The Cl-index quantitatively indicates that the hydraulic correlation degree between surface water and Zhidan Group aquifer,Zhidan Group and Zhiluo Formation aquifer is 0.28,which belongs to the medium degree of hydraulic correlation.The hydraulic correlation degree between surface water and Zhiluo Formation aquifer is 0.43,indicating that hydraulic correlation is weak.At the same time,the sur-face pumping test of Zhidan Group aquifer and the underground dewatering test of Zhiluo Formation aquifer further indicate that there is a hydraulic connection between Zhidan Group aquifer and Zhiluo Formation aquifer.Zhidan Group aquifer and Zhiluo Form-ation aquifer are the main water-filling aquifers of mine.关键词
水化学特征/阳离子交替吸附作用/水力联系/抽水试验/放水试验Key words
hydro-chemical characteristic/alternating cation adsorption/hydraulic correlation/pumping test/dewatering test分类
矿业与冶金引用本文复制引用
黄欢,董书宁..基于水化学特征及抽(放)水试验的含水层垂向水力联系研究[J].煤矿安全,2024,55(8):175-183,9.基金项目
国家重点研发计划资助项目(2023YFF130600) （2023YFF130600）
