Analysis of hydrogeological characteristics and water enrichment rules of floor 4-limestone in west wing mining area of Zhangshuanglou Coal Mine

Liang Guodong

doi:10.19896/j.cnki.mtkj.2025.04.008

Abstract：As the mining level of Zhangshuanglou Coal Mine gradually extends deeper and the main mining area shifts from the east wing to the west wing,the hydrogeological conditions of mine have also undergone significant changes.The hydrogeological characteris-tics of its floor and water abundance pattern of directly filled aquifer(4-limestone aquifer)are extremely important for the safety of pressurized mining in western wing of mine.Taking the west wing mining area of Zhangshuanglou Coal Mine as research area,a system-atic study was conducted on characteristics and hydrochemical properties of 4-limestone water bearing medium in floor of west wing mining area using various methods such as scanning electron microscopy,X-ray diffraction,and mercury intrusion porosimetry.The study showed that the main mineral composition of 4-limestone of floor was calcite and large pores were well developed.By conducting hydrochemical testing and analysis on 8 drilling water samples of 4-limestone of floor,the mechanism of groundwater formation,spatial distribution characteristics,and hydrodynamic characteristics were revealed.On this basis,the water abundance of 4-limestone of floor was comprehensively evaluated using existing data from both qualitative and quantitative dimensions,revealing the water abundance pat-tern of shallow part being greater than deep part in vertical direction,and the southern part being greater than northern part and eastern part being greater than western part in plane.The research results further enhance the understanding of hydrogeological conditions in western mining area of mine,and provide theoretical basis and engineering guidance for design and implementation of subsequent dewa-tering work.