Rich Water Detection And Water Hazard Assessment Of Coal Seam In Shuangma Coal Mine First Mining Area

Due to the complexity of the hydrogeology environment,it is affected by the sudden water from Roof aquifer in the process of development and construction from various coal mine companies in Ningdong area.Even the water accident happened occasionally which has a big influence on the production.Whether have the ability to clarify the water rich situation and make reasonable assessment and countmeasures plays a very important role in securing the safe production.In this paper,the object research is first working face of shuangma coal mine in Ningdong majiatan mine area.This paper judges the impact factor on aquifer in first working face is sandstone fissure in the Jurassic system(lower section)which affects the first working face in coal roof through the analysis of hydrogeology in shuangma coal mine.The water aquifer section of the top plate of the first working face is the formation of the pore aquifer in the sandstone fissure in the Jurassic system(lower section).Based on the geophysical characteristics of the study area,the rich water zone in coal seam roof aquifer is defined by using controllable source audio method for detecting the rich water zone.At the same time,the results of pumping test data of hydrologic drilling are used to verify and correct the detection results.Based on the empirical formula,the development height of the guide water fracture zone of the main coal seam is calculated,and the safety zone map of the coal roof is drawn.Set up main control factors including the thickness of the aquifer,the water inflow,the permeability coefficient and the rock quality index which affect the rich water aquifer of the coal seam roof.Establish the 3d numerical simulation model by using of the powerful spatial information processing function of geographical information.Use the analytic hierarchy process to evaluate each factor.Use three-dimensional composite superposition function of geographic information system for analysis and processing.Then the safety zone map of the coal roof is drawn.A comprehensive zoning map of roof water conditions was superimposed permeability coefficient and the rock quality index which affect the rich water aquifer of the coal seam roof.Establish the 3d numerical simulation model by using of the powerful spatial information processing function of geographical information.Use the analytic hierarchy process to evaluate each factor.Use three-dimensional composite superposition function of geographic information system for analysis and processing.Then the safety zone map of the coal roof is drawn.A comprehensive zoning map of roof water conditions was superimposed on the two graphs of rich water zone and fracture safety zone.Combine the analysis of geophysical exploration safety evaluation and provide the working suggestions and preventive measures on Shuangma coal mine for water prevention and control work and provide the scientific basis and powerful guidance for safety production.