知识与财富的链接
淮南煤田深部煤层开采受其下部岩溶水害的干扰,分析其化学组分分布规律、探讨其形成过程,可为水害防治提供一定的理论指导。本文以淮南潘谢矿区太原组岩溶含水层为研究对象,通过分析其水文地质背景,采用多元统计、水化学组分、水文地球化学反向模拟等方法,对该区两个次一级水文地质单元的水化学组分进行分析。结果表明：受挤压-拉张作用下的古地貌是影响古地下水补、径、排的重要因素;Ⅰ区、Ⅱ区阴、阳离子均以Cl-、Na++K+为主,但Ⅱ区中HCO3-占比较大,且Ⅰ区SO42-含量大于Ⅱ区;受局部开放的氧化环境影响,Ⅰ区主要以阳离子交换作用为主,存在黄铁矿氧化,而Ⅱ区以阳离子交换作用与黄铁矿的氧化为主,为还原环境,但逐步向部分氧化环境转变;长期的矿山开采活动使得区内岩溶地下水流系统发生持续改变,也是影响单元间岩溶水质产生差异性的重要因素。
Deep coal seam mining is deeply disturbed by the karst water hazard in the lower part of huainan coalfield. The analysis of water chemical components and the formation process will provide theoretical guidance for the prevention and control of karst water disasters. This paper takes the karst aquifer of Taiyuan formation in Panxie mining area as an example, the hydrochemical composition of two secondary hydrogeological units in this area was analyzed by means of multivariate statistics, hydrogeochemical composition, and hydrogeochemical reverse simulation, based on the analysis of its hydrogeological background. The results show that the ancient geomorphology under compression-tension is an important factor affecting the replenishment, runoff and drainage of ancient groundwater. In zones I and II, Na++K+ is the main cation and Cl- is the main anion, while, HCO3- accounts for a larger proportion in zone II, and the content of SO42- in zone I is higher than that in zone II. Under the locally open oxidative environment, zone I is mainly influenced by the cation exchange effect with existence of pyrite oxidation; zone Ⅱ is dominated by cation exchange and the oxidation of pyrite, and is mainly in a reducing environment, but gradually change to a partial oxidation environment; long-term mining activities changed the karst groundwater flow system in the area continuously, and it is also an important factor that affects the difference in karst water quality between units.
