Study On The Water Bearing Properties Of 4^th Limestone Aquifer And Its Water Inrush Vulnerability In Zhang Shuanglou Coal Mine

The exploiting depth and the working face size of coal mines have been increasing,the tunneling speed is obviously fast.Accordingly the condition,the harm and the mechanism of water hazard have been changed greatly.Considering these new changes in preventing and curing groundwater inrush in coal mines,the combination of multiple disciplines such as combined with engineering mechanics,computer,hydrogeology and other disciplines for research.focuses are as follows,the quick detection of water inrush pathway,space orientation,the equipment,the quick computation of water inrush yield and the prediction system.Thus the technology of preventing and curing water inrush will develop rapidly.According to the analysis of groundwater yield measured in Zhang Shuanglou Coal Mine,the 4^thlimestone groundwater is the main component.So the 4^thlimestone aquifer is the emphases of preventing and curing water inrush.In the period of shallow exploiting depth,groundwater drainage and water pressure decline for the 4^thlimestone aquifer was taken,large amounts of 4^thlimestone aquifer was discharged from mining area and woking face.Along with the exploiting depth increases,the technology of groundwater drainage and water pressure decline will be a problem.The technology of expoloitation above confined water should be proved.On the basis of indication layer theory,this paper utilized comprehensive methods of mathematical statistics,hydrogeochemistry,modern testing technology and multielement geological information combination to study the Karst development and water bearing of 4^thlimestone.The vulnerability index model of geological structure fractal,water inrush coefficient and water bearing was constructed.Using fractical dimension,analytic hierarchy and multielement geological information combination,the dangerous zones of water inrush of 4^thlimestone were divdied.Also the measures of preventing and curing water inrush were put forward.The resear results were benificial to safety and high efficiency production in Zhang Shuanglou coal mine.This paper has 38 figures,24 tables and 58 references.