基于水化学特征的深部岩溶地热水循环机制研究

Study on circulation mechanism of geothermal water in deep karst based on water chemical characteristics

针对平煤天安股份公司八矿开采区存在高水压和地温异常问题,在地温和地层、岩性、构造相互关系的基础上,结合水化学成分、同位素及其地球化学温标资料,研究了寒武灰岩水的水化学特征,阐述了寒武灰岩水的循环机制.结果表明,大气降水渗入顺着寒武系灰岩岩层的倾向向北和深部运移,由于八矿井田内构造和裂隙较为发育,最终在八矿井田内形成地热水的富水区和地热异常带.该研究为平顶山矿区地热水的综合开发利用和地热灾害治理提供了理论依据.

To solve high hydraulic pressure and geothermal anomaly in exploitation area of Pingdingshan No. 8 Mine, combined with the chemical composition of geothermal water, isotope and geochemical thermometric scale, water chemical characteristics were studied to illustrate circulation mechanism of cambrian limestone water in this region based on the relationship of geothermal temperature, formation, lithology and structure. The results show that atmospheric precipitation transports to north and deep along cambrian limestone formation after inleaking and finally rich water area, and geothermal anomaly belts in No. 8 Mine are formed for more developed structure and fracture. The study is the theoretical basis for comprehensive development and utilization on geothermal water and harnessing of geothermal hazards in Pingdingshan Mine.