唐家会矿地下水化学特征及其在断层导水性识别中的应用
Hydrogeochemistry characteristics of groundwater and its application to fault conductivity identification in Tangjiahui Mine
高银贵 1詹绍奇 2黄文迪 3孔皖军 1国伟 1赵得荣 2薛贤明 3姜春露 3郑刘根3
作者信息
- 1. 鄂尔多斯市华兴能源有限责任公司, 内蒙古 鄂尔多斯 017000
- 2. 平安煤炭开采工程技术研究院有限责任公司, 安徽 淮南 232001
- 3. 安徽大学 资源与环境工程学院, 安徽 合肥 230601
- 折叠
摘要
为了识别鄂尔多斯盆地北部唐家会矿DF1 断层导水性,预防采掘工作面突水事故的发生,通过采集唐家会矿二叠系砂岩水、奥陶系灰岩水(奥灰水)共36 组水样,利用Piper图、离子比例法及饱和指数法研究矿井地下水化学特征及成因,并基于水化学特征分析断层导水性.结果表明,砂岩水化学类型为Cl·HCO3-Na型和Cl-Na型,奥灰水化学类型为Cl-Na型.砂岩水和奥灰水中Na+主要来源于岩盐与硅酸盐岩的溶解;奥灰水中方解石处于平衡和过饱和状态,白云石处于未饱和状态,并发生了阳离子交换吸附.随着与DF1 断层距离的减小,61101 工作面底板注浆孔涌水TDS增加;11-4#孔涌水随着时间延长,Cl-逐渐增加,表明钻孔涌水中奥灰水的混合比例越来越大,DF1 断层在该区段为导水断层.
Abstract
In order to identify the hydraulic conductivity of the DF1 fault in Tangjiahui Mine in the northern part of the Ordos Basin,thus to prevent mine water burst in the mining and tunneling faces,36 sets of water samples were collected from Permian sandstone water and Ordovician limestone water(Ordovician water)in the mine,and the chemical characteristics and genesis of the mine groundwater were studied using Piper three-line diagram,ion ratio method and saturation index method.Based on the characteristics of water chemistry,the fault water conductivity was analyzed.The results show that the water chemical type of sandstone is Cl·HCO3-Na type and Cl-Na type,and the chemical type of Ordovician lime water is Cl-Na type.The Na+ in sandstone water and Ordovician water mainly comes from the dissolution of rock salt and silicate;the calcite in Ordovician water is in a balanced and supersaturated state,and the dolomite is in an unsaturated state and has undergone cation exchange adsorption.As it gets closer to DF1 fault,the water inflow TDS of floor grouting hole increases.As time goes on,Cl-increases gradually in the 11-4#hole,indicating that the mixing ratio of Ordovician limestone water in the borehole is increasing,DF1 fault is a water-conducting fault in this section.
关键词
唐家会矿/水化学特征/离子比例系数/饱和指数/断层导水性Key words
Tangjiahui Mine/hydrochemical characteristics/ion ratio factor/saturation index/fault water conductivity引用本文复制引用
基金项目
国家自然科学基金(41602310)
国家自然科学基金(42072201)
中国博士后科学基金(2017M611044)
安徽省教育厅重点项目(KJ2021A0085)
出版年
2024
NETL
NSTL
万方数据