The Study On Slope Stability Under The Action Of Blasting Vibration

The hazard of blasting excavation and the protection of slope instability have always been the key to the safe production of blasting,and it has been the basic research field of mining engineering and rock mechanics.Blasting excavation process,the slope instability is inevitable that a major problem,and blasting induced vibration will makes the slope displacement,crack,will greatly induced slope produced instability phenomenon,it can be said that the blasting vibration caused by slope instability failure of blasting has become the primary hazard.In this paper,several common Slope Blasting Vibration under the steady loss of form,through MATLAB and ANSYS software,using the strength reduction method and time history analysis method based on wavelet analysis and denoising,the static simulation of slope safety coefficient and slope under blasting dynamic safety coefficient.The results show that the slope test explosion signal frequency is about 10 Hz,dynamic modal analysis of the maximum frequency value is only 2.1951 Hz that the natural frequency of the slope is far less than that of the blasting signal frequency of main vibration and therefore does not produce due to resonance phenomenon caused by the failure of slope.Under the condition of blasting,the direct action of each blasting vibration the slope safety factor to reduce the 5.1%~12.6%.Each blasting damage caused by slope static safety factor reduces the 2.91%~8.38%.After the end of the experiment,due to the continuous blasting caused by rock mass cumulative damage the slope static safety factor change was 35.2%.It can be seen that the impact of blasting vibration on the safety factor of the slope is greater than that of the blasting load itself on the safety factor of the slope under the condition of multiple blasting.