边坡爆破振动测试及响应规律ANSYS时程分析

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Abstract The dynamic responses of high steep rock slopes are complex under blasting，which are commonly analyzed by combining field blasting vibration tests with ANSYS time-history analyses. A slope was analyzed using this method to investigate the influence of blasting vibration on slope stability and to find out the dynamic response rules of slope under blasting excavation. Analyses of blasting vibration tests show that vibration velocity may be magnified along elevation for high steep rock slopes when the blasting scale is large. Blasting methods without or with little amplification effect should be adopted to reduce the vibration and increase the dynamic stability of the slope. ANSYS time-history analyses show that：(1) The values of stresses are small but stress concentration occurs；(2) The nodal displacements are small and no plastic deformation happens in the slope；(3) The simulated values of velocity is consistent with the measured ones；(4) If only the dynamic effect of blasting is considered，the slope will not fail wholly；(5) As the blasting scale increases，obvious velocity amplification effect and inertia hysteresis effect happen. (6) The dynamic stress，displacement and velocity simulated by ANSYS can reflect the dynamic response characteristics of the slope well. The results of numerical simulations accord well with field testing results，providing guidance to similar projects.

Key words： slope engineering slope excavation blasting vibration tests dynamic response rule ANSYS time-history analyses

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	XU Mingbiao1
	2
	PENG Dehong2

Cite this article:

XU Mingbiao1,2,PENG Dehong2. BLASTING VIBRATION TESTS AND ANSYS TIME-HISTORY ANALYSES OF SLOPE RESPONSES[J]. , 2012, 31(S1): 2629-2635.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/2629

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