摘要
充分辨识小屯煤矿充水条件是矿区防排水工作布置的关键。在梳理矿区水文地质结构的基础上,利用水化学和氢氧同位素方法分析了矿区不同含水层地下水的化学类型与水化学组成特征,辨识了不同含水层地下水与矿井水之间的水力联系,探讨矿井可能的充水来源。结果表明:以三叠系夜郎组玉龙山段岩溶裂隙含水层为代表的地下水主要表现为以HCO_(3)^(-)、Ca^(2+)为主要水化学组成,水化学类型为HCO_(3)-Ca型,且地下水中NO-3浓度偏高、较为富集重同位素,而矿井水表现为高浓度SO_(4)^(2-)、Na^(+)、TDS等水化学组成特征,水化学类型为SO_(4)·HCO_(3)-Na型,且矿井水中NO_(3)^(-)浓度普遍偏低、氢氧同位素组成偏轻,与二叠系长兴-大隆组、龙潭组等裂隙水水化学和氢氧同位素组成近似;小屯煤矿仍主要以二叠系长兴-大隆组、龙潭组等为主要充水含水层,两者之间水力联系密切,而局部通道可能受到上覆三叠系夜郎组玉龙山段岩溶裂隙水的影响。
To fully recognize the water-filling conditions is the key to the layout of water control and drainage work in Xiaotun Coal Mine.On the basis of sorting out the hydrogeological structure of the mine,this paper mainly analyzes the hydrochemical types and composition characteristics of groundwater in different aquifers by using hydrochemical and hydrogen oxygen isotope methods,identifies the hydraulic relationship between different aquifers and mine groundwater,and discusses the possible water filling sources of the mine.The results show that the karst fissure groundwater of Yulongshan segment in the Permian Yelang Group is mainly of HCO_(3)^(-) and Ca^(2+) as the main water chemical composition(HCO_(3)-Ca type),and at the same time,the NO-3 concentration is relatively high and rich.However,the mine water shows high concentration of SO_(4)^(2-),Na^(+),and TDS,which leads to the hydrochemical type of SO_(4)·HCO_(3)-Na.Meanwhile,the mine water generally shows lower concentrations of NO_(3)^(-) and the depletion of stable water isotopes,which is close to the composition of karst fissure water in the Permian Changxing-Dalong and Longtan Group.The results of the study suggest that the main water-filling sources of Xiaotun Coal Mine are the Permian Changxing-Dalong group and Longtan group,which has close hydraulic relationship with each other,while the local channels contributing to the mining area may come from the karst water in the overlying Yulongshan segment.
作者
樊娟
南生辉
刘英锋
周天威
张光明
FAN Juan;NAN Shenghui;LIU Yingfeng;ZHOU Tianwei;ZHANG Guangming(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054;Xi'an Research Institute China Coal Technology and Engineering Group Co.Ltd.,Xi'an 710077,China;Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology in Shaanxi Province,Xi'an 710077,China;Zhong Di Huan Ke Hydrological Engineering Environment Technology Consulting Co.,Ltd.,Wuhan 430073,China;Xiaotun Coal Mine,Guizhou Dafang Coal Industry Co.,Dafang 551600,China)
出处
《安全与环境工程》
CAS
CSCD
北大核心
2021年第4期80-87,共8页
Safety and Environmental Engineering
基金
国家重点研发计划项目(2017YFC0804108)
中煤科工集团西安研究院科技创新基金项目(2020XAYJS05)。
关键词
水化学
氢氧同位素
充水条件
岩溶含水层
小屯煤矿
hydrochemistry
hydrogen and oxygen isotope
water-filling condition
karst aquifer
Xiaotun coal mine
