Prediction And Evaluation Of Water Inrush Risk In Ordovician Limestone Aquifer Of Guanyintang Coal Mine And Comprehensive Prevention And Control Technology Research

In recent years,water inrush accidents of limestone of the North China Ordovician have occurred from time to time in the domestic coal mine,the light flooded head flooded surface,the heavy flooded mine,resulting in casualties and heavy property losses,and the bottom Ordovician ash aquifer has become an important factor restricting the development of high efficiency intensive mining technology and safe production.Based on the comprehensive analysis of hydrogeological conditions in guanyintang coal mine,based on the mechanism of comprehensive prevention and control of limestone water,the comprehensive application of hydrogeological data analysis,water inrush zoning theory,practical engineering verification and comprehensive evaluation and analysis,the comprehensive control and control of limestone aquifer in Ordovician floor is studied.Based on the calculation of coal seam floor contour line and water inrush coefficient,it is divided into non-water inrush danger area,water inrush threat area and water inrush danger area,and the comprehensive prevention and control measures are designed and studied.The research result of this paper has found a scientific and reasonable technical solution for safe and efficient mining of working face threatened by bottom slab ash water,which has strong reference and application value.The paper has 15 diagrams,6 tables and67 references.