Hydrochemical Evolution of Karst Groundwater and Mining-Induced Activation Effects in a Coal Mining Area: A Case Study from the Tengxian Coalfield, China.

ABSTRACT: The prevention, control, and utilization of karst groundwater are prevalent issues in coal mining operations across North China. Karst water serves as both a potential hazard to safe coal production and an essential resource for domestic and agricultural use. However, decades of intensive, large-scale mining have significantly disrupted subsurface karst systems and intensified hydrogeochemical processes, particularly water-rock interactions. This study focuses on the Tengxian Coalfield in North China, where Ordovician and 14th limestone aquifers were sampled, and a multiwell drainage experiment was conducted in the Ordovician aquifer. Through a combination of multimethod approaches, the hydrochemical characteristics of karst groundwater under natural conditions and mining disturbances were

SUBMITTER: Tian B 

PROVIDER: S-EPMC12461308 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature