Chemical analysis of main water filling sources and identification of sudden(gushing)water sources in Yaoqiao Coal Mine

Gao Zhikuan; Sun Yanchen; Li Yonghua; Yuan Huiqing; Yi Haizhe

doi:10.19896/j.cnki.mtkj.2025.03.015

Abstract：The main coal seam of Yaoqiao Coal Mine is affected by Quaternary bottom water content,roof sandstone water and roof L4 grey water.In order to prevent water inrush disaster and ensure mine production safety,based on the analysis of mine hydrogeological conditions and hydrochemical data,by utilizing various methods such as Piper trilinear diagram,Gibbs model,and systematic clustering analysis,the hydrochemical characteristics of the main aquifers in Yaoqiao Coal Mine were systematically studied,and the water sources of mine water inrush was discriminated and analyzed.The research shows that the hydrochemical characteristics of the main aquifers in the mine gradually increase with the increase of buried depth,and the water recharge conditions are obviously different.Through Piper's three-line diagram analysis,the hydrochemical types of each aquifer are significantly different.The fissure water in roof sandstone is Ca-Mg-HCO3 type,and the limestone aquifer(L4 gray water)is characterized by high Ca2+,Mg2+,SO42-,while the old goaf has high salinity and complexity.Based on systematic cluster analysis and Gibbs model,the formation mechanism and hydraulic connection of va-rious water bodies are further revealed.Through the discrimination of ion proportional coefficient method,it is clear that the main source of mixed water inrush is the mixture of old goaf and bottom water,and the results are consistent with those of other research methods.In this study,a set of rapid and scientific water source identification method was put forward,providing a scientific basis for the rapid iden-tification of water inrush sources in Yaoqiao Coal Mine,and providing theoretical support and decision-making reference for the formu-lation of subsequent mine water disaster prevention strategies.