Study on Rock Unloading Failure and its Effects on Rock Burst

Li Ming Zhang; Zai Quan Wang

doi:10.4028/www.scientific.net/AMM.71-78.1455

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Study on Rock Unloading Failure and its Effects on...

Study on Rock Unloading Failure and its Effects on Rock Burst

Abstract:

The mechanical parameters and failure characteristics were obtained based on the results of triaxial unloading tests of limestone. Results show that: The evolution of volumetric strain is determined by lateral strain under unloading condition. Failure modes of rock can be classified into three types. Deformation modulus decreases and Poisson ratio increases in the process of unloading. Mohr-Coulomb criterion can not describe rock unloading failure strength property. Rock burst occur during tunnel excavation are closely related to the rock unloading failure characteristic.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

1455-1458

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.1455

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Online since:

July 2011

Authors:

Li Ming Zhang, Zai Quan Wang

Keywords:

Mechanical Parameters, Rock Burst, Triaxial Unloading Test

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