复杂环境下倾倒式危岩体的动力稳定性分析

doi:10.13722/j.cnki.jrme.2015.1443

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Abstract One of the main geologic disasters，the avalanche of perilous rock has important influence on the loss of lives and economic values. The indirect effects of water in fissures on the dynamic stability are not taken into account in Chinese specifications. Based on the assumptions of solid and fluid mechanics，the coefficient of reflection and transmission of the incident P waves at the interface of solid-liquid was deduced and verified in terms of the energy conservation，and then the hydrodynamic pressure acted on the perilous rock was calculated. The influence of the elastic modulus，density and Poisson?s ratio on the dynamic stability coefficient was studied qualitatively according to the expression of the transmission coefficient. The proposed method has been extensively applied to analyze the stability of unstable toppling rocks at Wanzhou district in Chongqing. The influence of the rainfall intensity and ground motion intensity on the stability of perilous toppling rock was discussed. The dynamic stability coefficient was reduced considering the hydrodynamic pressure in fissures. The reduction was more obvious in the case of rainstorm. It was concluded that the hydrodynamic pressure should be taken into account for the stability analysis of unstable rock in complicated surrounding conditions.

Key words： rock mechanics perilous toppling rock the interface of solid-liquid transmission coefficient hydrodynamic pressure stability coefficient

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	Articles by authors
	CHEN Jianyuan
	YUE Hongyuan
	XU Qiang

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CHEN Jianyuan,YUE Hongyuan,XU Qiang. Dynamic stability analysis of perilous toppling rock in complex environment[J]. , 2016, 35(10): 1965-1974.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1443 OR http://www.rockmech.org/EN/Y2016/V35/I10/1965

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