A study on modes of rock failure under uniaxial compression

Bisai, R (2014) A study on modes of rock failure under uniaxial compression. MTech thesis.



Rock failure is a serious problem in rock engineering. Rock failure modes are complex and difficult. A comprehensive study on rock failure modes at laboratory scale is very important. It helps to recognize the adequacy of the support designed on the basis of the nature of an engineering work. With due need, this paper analyzes the failure modes of rock under uniaxial compression test. The nature of the principal failure mode is changed from axial splitting and shearing along a single plane to multiple fracturing in the case of rock specimens as uniaxial compressive strength (UCS) increases. Descriptions of different failure modes under UCS were presented below. It was found rock specimens generally fail through the rock materials in one or more extensional planes of the fracture development in brittle crystalline rock materials. It appears that there are different types of failure and it is for the microscopic discontinuities in rock samples but not for the variations in sample preparation or test process or end boundary conditions. This study makes it possible to determine whether the rock samples failed in tension or failed in shear or in coupling of tension. It is hypothesized that the mode the sample fails affects the strength of rock samples.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Rock failure, uniaxial compression test, Failure mode, UCS, microscopic discontinuities
Subjects:Engineering and Technology > Civil Engineering > Geotechnical Engineering
Divisions: Engineering and Technology > Department of Civil Engineering
ID Code:5531
Deposited By:Hemanta Biswal
Deposited On:18 Jul 2014 15:04
Last Modified:18 Jul 2014 15:04
Supervisor(s):Roy, N

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