Study on Stability Monitoring of Bottom Structure Under the Influence of Ore Drawing
In order to study the influence of ore drawing operation of natural caving mining method on the the stability of bottom structure,the influence of ore drawing quantity on the pillar stress of bottom structure was analyzed by using the stress and microseismic monitoring results of mine ground pressure monitoring system.The spatial and temporal distribution of bottom structure fracture events during ore drawing process was studied,and the stress monitoring results were verified by microseismic activity parameters.The results show that the imbalance of ore drawing operation in time and space will lead to stress concentration in the local rock mass of the bottom structure,and the stress distribution of the bottom structure can be adjusted by continuous and stable ore drawing in the stress concentration area.The microseismic activity parameters can reflect the failure process of rock mass,and provide a reference for evaluating the ground pressure disaster risk of the bottom structure during the ore drawing process.With the help of microseismic monitoring system,the stress concentration area has been delineated,so as to make up for the deficiency of stress single point monitoring coverage on a large scale.
万方数据
维普
