GIS-Based Evaluation of Advanced Regional Treatment of Limestone Aquifers in Deep Coal Seam Mining

This study proposes a novel and systematic evaluation method for assessing the effectiveness of advanced regional treatment of limestone aquifers in deep coal seam mining. The lack of an effective evaluation system following the implementation of the Technical Specification for Advanced Regional Treatment of Limestone Aquifers under Coal Seams (2024) has hindered the optimization of water hazard control strategies. To address this, we develop a comprehensive multi-factor evaluation model that integrates GIS-based spatial analysis, statistical modeling of grouting data, and aquifer water-blocking capacity assessment. A key advancement of this study is the integration of surface-directed multi-branch horizontal well data with GIS zoning methodologies, allowing for a more precise and quantitative assessment of grouting effectiveness. Field validation in multiple mining areas demonstrates that this approach significantly enhances the reliability of water hazard governance, providing a scientific and practical tool for safe and efficient deep coal seam mining.