Abstract
Jurassic weathered bedrock is widely distributed in the Jurassic coalfield of Northern Shaanxi Province. Its fracture network is connected with each other well, which provides a good space foundation for groundwater storage. It makes bedrock weathered zone become one of the important aquifers that endanger coal mine safe production. It is quite necessary to predict bedrock weathered zone aquifer water yield property scientifically to provide a technical guarantee for mine water inrush hazard prevention and control. In order to find out the characteristics of bedrock weathered zone aquifer water yield property, the 5 main control factors affecting weathered bedrock aquifer water yield property, characteristics of overlying aquifer, weathered bedrock strata age, lithologic composition feature, weathering intensity of bedrock, and bedrock weathered zone thickness, are selected to establish a water yield property index mathematical model on weathered bedrock aquifer by the fuzzy Delphi analytic hierarchy process (FDAHP) method and protracted water yield property partition map with the help of ArcGIS. Through analysis and comparison, established water yield property index model and partition map are feasible with a relative high accuracy. Meanwhile, it has some good directive significance to predict weathered bedrock aquifer water yield property type for surrounding mines with similar conditions.
Published Version
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