Deformation and Instability Law of the Rock Mass in Fault Fractured Zone of the Open-Pit Slope Under the Coupling Action of Freeze-Thaw
In order to investigate the deformation and instability law of rock mass in the fault fractured zone of an open-pit iron mine slope in Xinjiang in high-altitude and cold area,FLAC3D software was used to simulate and analyze the deterioration effect of freeze-thaw cycle and engineering blasting disturbance on the stability of the fault fractured zone of mine slope.The results show that with the increase of freeze-thaw cycles,the plastic zone of the slope with fault fractured zone is increasing.The safety stability coefficients of the slope are 1.70,1.53,1.31 and 1.14 respectively when the freeze-thaw cycles are 0,20,40 and 60 times,indicating that the more the freeze-thaw cycles,the lower the safety stability coefficient of the slope.Under different freeze-thaw cycles,the slope model with fault fractured zone produces the maximum horizontal displacement at the upper half of the right slope,and the maximum vertical displacement at the middle of the right slope.After the blasting disturbance wave is applied,the vibration velocity and displacement of the fault fractured zone increase with the increase of the freeze-thaw cycles.The closer the monitoring points are to the location of the explosion source,the greater the impact on the displacement and vibration velocity.
Freeze-thaw cycleBlasting disturbanceFault fractured zoneDeformation and instability lawNumerical simulation
万方数据
维普
