Title

Shear behaviour of graphite infilled joints based on constant normal stiffness (CNS) test conditions

RIS ID

9028

Publication Details

Indraratna, B and Welideniya, H, Shear behaviour of graphite infilled joints based on constant normal stiffness (CNS) test conditions, International Society for Rock Mechanics 10th Congress: Technology Roadmap for Rock Mechanics, 2003, 569-574, Republic of South Africa: South African Institute of Mining & Metallurgy.

Abstract

Due to the reduction in frictional resistance, the characteristics of joint infill have a major role to play on rock mass instability. This paper elucidates the laboratory behaviour of graphite infilled joints based on a large-scale shear apparatus under constant normal stiffness (CNS). Discontinuities in a graphite mine have been simulated using high strength gypsum plaster, with the joints infilled with compressed graphite layers. The Fourier series was employed to characterize the joint surface, and the method of using the Fourier coefficients for the prediction of dilation and normal stress with displacement is explained.

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