Study On Stability Of Open-pit High And Steep Slope Under Dynamic Load

Along with the social development,all kinds of project quantity increase gradually,the required building stone demand is also growing,mine blasting also gradually increased,thus formed a large number of blasting in the slope,the slope stability may be under blasting is more and more low,the occurrence of disasters such as landslide,will produce a personnel casualties and economic loss,therefore,At present,it is urgent to study slope stability deeply.Located in zhoushan,zhejiang province huang mountain building stone ore is formed under the action of blasting blasting in the slope,which might be under the action of blasting stress wave of continuous produce safe hidden trouble,based on the blasting vibration data are fitting,this paper get the attenuation law of blasting vibration wave,big emperor mountain through the study of the energy of vibration signal analysis and using numerical simulation software to establish model of slope,The stability of the slope is analyzed.(1)Through recording and analyzing the blasting vibration data collected in the field,Origin software is used to linearly fit the data of blasting vibration velocity in three directions,and the blasting vibration attenuation correlation coefficient K and a values are obtained.(2)The vibration signal was analyzed by HHT method.Through EMD decomposition and Hilbert transformation of vibration signal,it is concluded that the increase of single charge will reduce the dominant frequency of signal and shorten the frequency band of signal energy,which may adversely affect the stability of slope.(3)Using the numerical simulation software ANSYS to establish a slope model to simulate the stability of slope under the action of gravity only.The potential slip surface and safety factor of slope are determined by strength reduction method.From the simulation results,the safety factor of the slope is 2.41,and the potential slip surface of the slope runs through the foot of the slope,which provides a theoretical basis for effectively preventing the instability of the slope.(4)Slope model is established,the actual measured time history curve of speed as the load input to the model,the analysis model of the dynamic response characteristics,found that the increase of single segment dose not only can make the stress and displacement of the slope produce bigger,will cause the maximum stress and the displacement of time shortened,and the single segment is not present linear relationship between the dosage and displacement,The increase rate of displacement is greater than that of dosage.Figure 50 Table 8 Reference 57...