桌子山煤田奥灰水水化学特征及成因分析
Hydrogeochemical characteristics and forming reason of Ordovician limestone groundwater in Zhuoshan Coalfield
-
摘要:
桌子山煤田奥陶系灰岩地下水是区域煤层开采的主要充水水源，同时也是乌海市重要的地下水水源，研究该区域水文地球化学特征及成因，对矿井水害防治及地下水资源开发利用均具有重要意义。以奥陶系灰岩水为研究对象，采集煤田奥陶系灰岩地下水样37组，综合利用piper三线图、Gibbs图及离子比例关系分析了奥陶系灰岩地下水化学特征及其形成作用。研究结果表明：桌子山煤田奥陶系灰水水化学组分的分布特征与地下水径流方向密切相关，Na++K+、HCO-3、Cl-和SO2-4的离子浓度及理化指标TDS、pH值由补给区向排泄区呈现增大的趋势，Ca2+和Mg2+浓度呈现减小的趋势，并且以上指标在煤田北部和南部地区变化较大；由桌子山补给区向甘德尔山再转南北向径流的水化学类型变化较为明显，主要为“水迟缓交替作用带”，经历正向离子交换作用，而由桌子山补给区向南径流的水化学类型始终为SO4·Cl-Ca·Na型，控制作用由“水迟缓交替作用带”转为“水消极交替作用带”，反向离子交换作用强烈；整个桌子山煤田可划分为北、中、南3个水化学特征区，煤田北部因地质构造的缘故使地下水形成滞留区，径流过程紊乱且形成过程较复杂，中部未受到地质构造阻挡，径流方向不变，地下水化学形成过程简单，而南部因地层加深和断层阻隔的缘故形成滞留带，使地下水水化学形成过程较复杂。
Abstract:The ordovician limestone groundwater in Zhuozishan Coalfield is the main water source of regional coal mining and also an important water source of Wuhai City. Thus,the research on hydrogeochemical characteristics and cause analysis of Ordovician limestone water in Zhuozishan Coalfield is of great significance for prevention and control of mine water as well as development and utilization of water resources. In this study,34 groups of Ordovician limestone water samples were collected in Zhuozishan Coalfield,and the chemical characteristics and control factors of groundwater were analyzed through comprehensive use of Piper trilinear diagram,Gibbs diagram,and the ratio relationship of ions. The research results show that ionic concentration of Na++K+,HCO-3,Cl- and SO2-4 in Ordovician limestone water increases from the recharge area to the discharge area,while that of Ca2+ and Mg2+ decrease. Each indicator varied greatly in the north and south of the coalfield. The hydrochemical type of runoff from Zhuozishan Mountain to Gander Mountain and then to the north and south varied significantly,which was mainly controlled by rock weathering type and experienced positive ion exchange. While the hydrochemical type of the runoff from Zhuozishan Mountain to the south was always SO4·Cl-Ca·Na type,and the control effect changed from rock weathering to evaporation concentration. It mainly experienced reverse ion exchange. The Ca2+ and Mg2+ in Ordovician limestone water in coal mine were mainly from silicate dissolution,while the Na+ and K+ were mainly from ion exchange and less from rock-salt dissolution. The whole Zhuozishan Coalfield can be divided into three hydrochemical characteristic regions in the north,middle and south. In the north of the coalfield,due to geological structure,a retention area was formed with groundwater,and the runoff process was disordered with a complicated formation process. The middle was not blocked by the geological structure,the runoff direction did not change,and the formation of groundwater was a simple process. In the south,due to the deepening stratum and fault blocking,a retention zone was formed,making the formation of groundwater a more complicated process.
-
-
期刊类型引用(4)
1. 杜丹丹，白燕英，袁德亮. 河套灌区地下水化学时空特征及环境驱动因素. 环境科学. 2024(10): 5777-5789 . 
百度学术
2. 刘斌斌，孟凡林，薛建坤，郭军旗，罗安昆. 榆树泉矿区地下水化学特征及水力联系程度分析. 能源与环保. 2023(08): 73-79 . 百度学术
3. 王迪，赵相朋. 底板破碎条件下高承压水快速堵水技术研究. 煤炭与化工. 2023(09): 76-78+82 . 百度学术
4. 姜春露，黄文迪，傅先杰，郑刘根，程世贵，单崇磊. 淮南阜东矿区二叠系砂岩高盐地下水低硫酸盐特征及成因机制. 煤田地质与勘探. 2023(11): 74-82 . 百度学术
其他类型引用(0)
计量
- 文章访问数: 50
- HTML全文浏览量: 3
- PDF下载量: 360
- 被引次数: 4
下载:
