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Keywords: normal stress
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-204
... having an intact strength within the range 20–80 MPa. Only samples of clean natural partings were prepared at the laboratory and then tested by single-stage and multi-stage procedures using a servo-controlled shear box, to ensure the application of constant normal stress throughout each test. This paper...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-209
... demonstrated the water infiltration could significantly impact hydraulic fracturing behavior and the breakdown pressure was increased with the injection rate (Zhuang et al., 2018). shale gas Fluid Dynamics normal stress reservoir geomechanics complex reservoir injection pressure asian rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-256
... granite in response to fluid injection under a constant normal stress and a constant critical shear stress, respectively. In the most cases, the pore pressure at the injection-induced failure exceeds that predicted by the Mohr-Coulomb failure criterion. This is attributed to the nonuniform distribution of...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-019
... ° ; σ 3 =5.01, N62.86 ° E ∠ 63.86 ° . The M-HTPF method offers a new access to determine a complete stress tensor using a single borehole. 1. Introduction In 1984, Cornet and Valette proposed that the hydraulic test on pre-existing fractures could be utilized to measure the normal stress on the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-034
... to 10 kilometers has gradually attracted people's attention. Artificial Intelligence insulation renewable energy geothermal reservoir isrm international symposium Upstream Oil & Gas geothermal energy normal stress enhanced geothermal system excavation technology rock mass asian...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-047
... dilation-induced shear displacement behaviors of rock joints under variations normal stress and JRC values. In the future, the linearized Barton's model has the potential to be applied in computer codes for fractured rock modeling. By implementing this model, neither the simplicity of the linear M-C...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-098
... laboratory experiments, where the smooth cleavage joints were generated by sawing off and the rough joints were generated by the Brazilian Split test. The experimental results of double joints of sandstone show that, under lower normal stress the interlayer rock between two joints does not fracture, and the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-112
... was tested under constant normal load (CNL) boundary condition, and the range of normal stress was 0.1–0.7 (MPa) applied by a pair of pneumatic cylinders. Experimental results show that the shear displacement curves exist obvious stick-slip phenomenon especially in low shear rate and high normal...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-298
... blasting has proven to be an effective method for preventing and treating rock burst. Upstream Oil & Gas rapid stress release method stress state metals & mining relaxation area normal stress rock mass construction Reservoir Characterization renewable energy dynamic disturbance...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-046
... allowing the evaluation of asperity breakage and surface wear. One of the joint specimens was tested under several normal stresses, which allowed the estimation of its mechanical characteristics, and was scanned after each test to evaluate the influence of the normal and shear load on the variation of...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-026
... load (CNL) condition with three normal stresses 150 kPa, 300 kPa and 450 kPa. Because of quarter symmetry of the specimen four direct shear test have been carried out at angle of 0°,30°,60° and 90° and assumed that the same results will be repeated in other quadrants. Results from direct shear tests...
Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-032
... is applied while the shear displacement and water head drop are monitored for every 0.5 mm interval of shear displacement. The fracture hydraulic conductivities decrease exponentially with increasing normal stresses. The physical and hydraulic apertures increase with shearing displacement...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-164
... compressive strength and elastic modulus are 1.22 MPa and 224 MPa which are similar to those of bentonite mixed with cement. The shear strengths between the grouts and fractures surfaces are from 0.22 to 0.90 MPa under normal stresses from 0.25 to 1.25 MPa. The S:C ratio of 5:10 gives the lowest permeability...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-037
... are progressively increased from 0.63MPa to 1.85MPa. Finite difference analyses have been performed to calculate the normal and shear stress distributions on the fracture under various orientations. The results indicate that the increases of the normal stresses rapidly decrease the fracture...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-015
... 15 cm. abutment in-situ shear test jointed rock mass displacement normal stress shear displacement shear test Upstream Oil & Gas normal load material research station shear stress Shear Strength Parameter Reservoir Characterization friction angle foliation joint shear zone...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-070
... flow through the joint. Upstream Oil & Gas nuclear waste repository hydraulic fracturing cavern experiment deposition hole deposition tunnel Barton rock joint shear displacement Olsson hydraulic aperture joint conducting aperture aperture normal stress hydromechanical...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-044
... criterion for the joints. However, this linear criterion is unable to describe adequately the shearing behaviour of rock joints, which are rarely smooth, and their strength is a non linear function of the existing normal stress. Experiments ondiscontinuities have shown that for low normal stresses, the...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-004
... rock joint. The test results for the non planar joint indicates that CNS boundary conditions yield a higher peak shear stress than that under CNL boundary condition for the same initial normal stress. A detailed account of deformation behaviour is discussed in this study. INTRODUCTION The correct...
Proceedings Papers

Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-033
... center of the box causes an increase in the friction angle whereas the cohesion decreases for the material and the range of normal stresses used. 1. Introduction Oversize particles in a direct shear test or a triaxial test can change the shear and deformational characteristics of soil. This subject...
Proceedings Papers

Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-025
... 2. Wellbore Design abutment normal stress determination Upstream Oil & Gas contact surface rock-concrete contact surface concrete dam reservoir geomechanics displacement normal load discontinuity Reservoir Characterization in-situ direct shear test Shear Strength Parameter...

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