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Date:2022-08-29

Indexed by:Journal Article

Date of Publication:2022-06-29

Journal:岩石力学与工程学报

Institution:建设工程学部

Volume:35

Issue:10

Page Number:1965-1974

ISSN:1000-6915

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.

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