Evaluation of Water Inrush Risk Level in Deep Mining Based on AHP-entropy Weight Method and GIS
In order to accurately evaluate the problem of water gushing in deep mining,this paper selects seven main controlling factors of water inrush,including water head difference,water richness,permeability coefficient,aquifer thickness,water pressure value,fault strength and karst zonation,and makes a comprehensive analysis from two aspects:water source and water channel.The weights of each main control factor were calculated by AHP-entropy weight method,and then the risk level of water gushing was determined by GIS spatial superposition analysis and the zoning map was made.The results show that the risk of water gushing is high in the place with sufficient water source and strong fault development.The evaluation results are consistent with the measured water gushing point of the mine,which proves the scientificity and practicability of the method,and provides a reference for the resource exploitation and water disaster control work in the mine.