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Keywords: normal stiffness
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Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-116
... shear test is divided into constant normal load (CNL) test and constant normal stiffness (CNS) test according to loading condition. The CNL condition is applicable to rock slope while the CNS condition corresponds to underground rock mass where the shear behavior of discontinuities depends...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-144
... ABSTRACT The shear behavior of rock joints greatly influence by the presence of asperity and the normal stiffness of the surrounding rock mass. Correct evaluation of the shear strength of rock joints plays an important role in the design of deep underground openings, stability analysis of rock...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-103
... of the boundary condition takes place. This paper outlines the basic stages of the shear process and focuses on the particularities of confined shearing. A normal stiffness model is established which allows determining the total dilation of a rough joint under confined conditions and, in consequence, separating...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-022
... controlled test procedure was developed (Pötsch 2002). reservoir geomechanics joint model dilation residual envelope strength normal stress procedure rock mass normal stiffness stiffness Reservoir Characterization displacement boundary condition shear behaviour shear displacement...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-081
... The shear behaviour of infilled joints produced from ordinary gypsum plaster (gyprock) and bentonite was investigated in the laboratory under Constant Normal Stiffness (CNS) conditions. Shear tests were performed on saw-tooth profiles having Joint Roughness Coefficients (JRC) of 4.75 and 9.25...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-054
... stiffness shear test joint sample mechanical property surface roughness aperture normal stress amplitude parameter normal stiffness sample size 319 Fardin, N., Stephansson, O., Jing, L., Scale effect on the geometrical and mechanical properties of rock joints ISRM 2003 Technology roadmap...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-052
... ABSTRACT: This paper presents a simple procedure to evaluate the stress-displacement behavior of clean rock joints sheared under a constant normal stiffness. The predictions of the model are compared with test results on joints with different geometries. The results show good agreement...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-153
... applied to six sub-horizontal joints intersected by a borehole at Luleå University of Technology, Sweden. The rock type at the site is granite and the joints are located at 80 to 417 metres depth. The study demonstrates that hydraulic aperture and joint normal stiffness can be determined accurately from...
Proceedings Papers

Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-086
... ABSTRACT: A laboratory study has been made of the direct shearing of concrete-sandstone interfaces under conditions of constant normal stiffness. The results demonstrate that the peak and residual strength envelopes (stress ratio versus normal stress) are independent of the test path. RESUME...

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