Skip to Main Content
ASME Press Select Proceedings

Geological Engineering: Proceedings of the 1st International Conference (ICGE 2007)

Editor
Baosong Ma
Baosong Ma
Search for other works by this author on:
ISBN:
9780791802922
No. of Pages:
1760
Publisher:
ASME Press
Publication date:
2009

Based on the fractal simulation of rock joints, two types of numerical direct shear test models of rock joints were established, and the scale effect and the infill effect of the shear strength parameters of the rock joint were studied by using the numerical test method. The results of the first type of numerical direct shear test show that the critical joint size (CJS) exists by which the scale effect of the shear strength parameters of the rock joint can be eliminated. With the increase of the fractal dimension of the rock joint, the scale effect becomes more outstanding and the critical joint size develops larger. The results of the second type of shear direct test show that when the ratio of the infill thickness t to the asperity height a of rock joints (abbreviated as the thickness-height ratio t∕a in the following of this paper) is less than 1, the shear strength parameters of rock joints are controlled by the joint roughness, the mechanical properties of rock wall and infill material, and the shear strength parameters of rock joints decrease rapidly as the t∕a ratio increase. When t∕a is bigger than 1, the shear strength parameters are mainly controlled by the mechanical property of infill material and the value of shear strength parameters indicates infill material.

This content is only available via PDF.
You do not currently have access to this chapter.
Close Modal

or Create an Account

Close Modal
Close Modal