爆破振動在邊坡上的傳播規(guī)律及對邊坡穩(wěn)定性的影響
[Abstract]:The influence of blasting vibration on slope stability has been a hot topic for scholars all over the world. Blasting vibration will greatly reduce the stability of the slope, and the slope stability will directly affect the normal production of the work site, the safety of equipment personnel and the economic benefits of the enterprise. Therefore, it is of great significance to study the propagation law of blasting vibration on slope and better understand the influence of blasting vibration on slope stability. In this paper, the laws of vibration velocity propagation of different types of slopes are studied by combining physical simulation test with field test, and the stability of slope under static and dynamic conditions is analyzed according to the field measured data. The main results are as follows: (1) the propagation law of blasting vibration on slope. Through the blasting vibration test simulation test of the step slope and the straight side slope, the results show that the blasting vibration velocity decreases from the edge of the step to the root of the step on the same platform. At the same time, the attenuation rate of the vibration velocity decreases from the edge of the step to the root. At the top and bottom of the slope on the same step, the vibration velocity of the top of the slope will increase or decrease slowly relative to the velocity of the bottom of the slope, the attenuation of the vibration velocity of the straight side slope is relatively gentle. (2) the prediction of blasting vibration velocity. When predicting the blasting vibration velocity of the step slope, the prediction accuracy is the highest only when the vibration velocity of the step root measuring point is predicted, and the prediction accuracy is slightly poor when the blasting vibration velocity of the step root and the intermediate measuring point is forecasted. When the blasting vibration velocity is predicted for all the measured points, the prediction accuracy is the lowest due to the sudden increase of the blasting vibration velocity at the edge of the step. (3) study on the amplification effect of blasting vibration. The magnification factor of the vibration velocity of the step slope increases with the increase of the angle of the step slope and the final slope angle, and the blasting vibration velocity amplification phenomenon occurs at the top edge of the straight side slope. (4) the stability analysis of the slope. The stability analysis of the cutting slope of No.1 Road of the Industrial Park of Science and Technology City in Mianyang City shows that the slope is stable under both static and blasting conditions, but the coefficient of stability decreases with the increase of slope series. The slope stability coefficient under blasting vibration is 5.95% lower than that under static action, and the slope stability loss coefficient increases with the increase of slope progression under blasting vibration.
【學位授予單位】:西南科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TD804;TD235
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