Mutation Instability Model of Perilous Rock and Calculation Methods for Corresponding Dynamic Parameters

Abstract:

Failure mechanism of perilous rock and its corresponding dynamic parameters is one of the basic theoretical questions for the security alert implement about collapse disaster. Focusing on the dominant fissure of perilous rock, it is divided into linking patch and locked patch, and the constitutive model of dominant fissure is proposed. Based on the energy principle, it proposes the deformation energy formula of perilous rock with dominant fissure’s creeping displacement. On the mutation theory, it establishes the failure cusp mutation model of perilous rock, and the calculating formulas of creeping displacement on failure starting point and end point and the controlling factors of dynamic instability are gained. With scientific theory, elastic energy releases and transforms to the elastic and impulsive kinetic energy at the moment of dynamic instability, and a method to calculate the violent-slide velocity and acceleration on collapse mass at that moment is proposed. Practical examples indicate that this method is useful in engineering practice.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 1030-1039
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.1030
• Online since: December 2012
• Authors: Hong Kai Chen, Lan Tang, Rui Gang Zhang, Hong Mei Tang, Reng Jie Wu
• Keywords: Calculation Method, Dynamic Parameter, Mutation Instability Model, Perilous Rock, Rock Mechanics

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