Study on floor failure depth of mining on confined water in Xinji No.2 Mine
In order to improve the upper limit of No.1 coal mining in Xinji No.2 Mine and provide a basis for water disaster prevention and control,the geological data of Xinji No.2 Mine were fully analyzed.UDEC 7.0 was used for numerical simulation test to simulate the development of floor when the working face was advancing.It was concluded that when the working face advanced to 120 m,the floor reached the maximum failure depth of 19.3 m.The parallel electrical method was used to monitor the fracture process of coal seam floor strata.By observing the change trend of resistivity,the deformation process of rock mass was judged,and the depth of coal seam mining failure zone was determined to be 19.6 m.The results showed that the numerical simulation results were basically consistent with the electrical test results.The bottom of the floor failure zone was the protective zone of the floor rock layer.The integrity of the rock layer below the protective zone was good and could play a certain role in water insulation.The research results were of great significance to the study of confined water mining under similar geological conditions.
floor damagemining on confined waterUDEC 7.0network parallel electrical method
国家科技期刊平台
NSTL
万方数据
