Hydrochemical Constraints on the Flowing Paths of Groundwater in Limestone Reservoirs beneath the Pingdingshan Coalfield in North China  

作　　者：WU Zhanhui WANG Xinyi LI Jiexiang CUI Junchao ZHANG Bo 

机构地区：[1]Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo,Henan 454000,China [2]Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,Jiaozuo,Henan 454100,China [3]State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization,Jiaozuo,Henan 454100,China [4]Pingdingshan Tian'an Coal Industry Co.,Ltd.,Pingdingshan,Henan 467000,China [5]Institute of Energy and Chemical Industry,China Pingmei Shenma Group,Pingdingshan,Henan 467000,China

出　　处：《Acta Geologica Sinica(English Edition)》2024年第6期1615-1636,共22页地质学报（英文版）

基　　金：granted by the National Natural Science Foundation of China(42102297,41972254);Innovative Science and Technology Talents Team Construction Project of Henan Province(CXTD2016053);China Postdoctoral Science Foundation(2021M701098);Special Funds for Higher Education Basic Scientific Research Funds of Henan Province(NSFRF200103;NSFRF210304)。

摘　　要：The karst groundwater of Cambrian limestone may become an important water source for industry and agriculture in the Pingdingshan area,and is also a potential threat to mining safety.Therefore,to find out the origin,flow paths,and hydrogeochemical processes of karst groundwater beneath the Pingdingshan coalfield,a total of 16 water samples were collected.Our findings confirmed that the karst groundwater is mainly recharged by precipitation.The precipitation can directly supply the deep aquifer of the karst water system through the southwest limestone outcrops,and this area mostly includes the southern part of mines No.11,No.9,and the hidden outcrops in the southern part of mine No.2.What is more,the areas adjacent to the synclinal axis,including mines No.10,No.12,and No.8,may be the main discharge areas.A mixing model of^(87)Sr/^(86)Sr and Sr showed that in the southwest Pingdingshan coalfield,the proportion of precipitation decreased gradually from the recharge area to the discharge area,ranging from 89.1%to 17.1%.Besides,the northeast Pingdingshan coalfield is another recharge area for the whole karst system,thus,the infiltrating groundwater will indirectly supply the deep aquifer through Quaternary deposition near the mine No.13.Our research results can provide theoretical support for the prevention and control of groundwater disasters and the development and utilization of regional groundwater resources in the coalfield in Northern China.

关 键 词：GROUNDWATER flowing path HYDROCHEMISTRY strontium isotope Pingdingshan coalfield 

分 类 号：P641[天文地球—地质矿产勘探] TD74[天文地球—地质学]