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Keywords: rock strength
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Proceedings Papers

Paper presented at the ISRM SINOROCK 2013, June 18–20, 2013
Paper Number: ISRM-SINOROCK-2013-057
... measure rock micro-unit strength. Classic Mohr-Coulomb criterion doesn't consider the effect of intermediate principal stress on rock strength and is a linear failure criterion. However, the deep high stress rock has nonlinear characteristics (Zhou et al. 2005, Lü et al. 2005). The Drucker-Prager...
Proceedings Papers

Paper presented at the ISRM SINOROCK 2013, June 18–20, 2013
Paper Number: ISRM-SINOROCK-2013-106
... and surrounding rock strength, and the whole failure process of small spacing tunnels is successfully simulated in the calculations. Some conclusions can be drawn from the calculations. Firstly, when the tunnel spacing is small, the surrounding rock above each tunnel collapse separately at first, while...
Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-019
... efforts to investigate the effects of discontinuities on rock strength in recent years, but dip- direction of joints and their effects on rock strength were ignored. An extensive investigation was planned and undertaken in order to study the strength response of rocks when the dip-directions, of two...
Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-025
... for surface condition, respectively. In order to obtain this correlation formula, optimized method was applied. Additionally, the maximum value of the modified GSI was adjusted to 70 which is the maximum value of RMR excluding rock strength and underground water conditions. In this study, a new method based...
Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-037
.... Therockburstfeaturesindicatethepronouncedeffectofthefabricoftheschistous structure of gneiss on the strength and deformation characteristics of intact rocks. The analysis on the geological conditionsinterms ofinitial geostatic stress, rock strength andthe occurrence of the gneiss foliation planes indicates that the schistous structure of gneiss is in favor...
Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-057
... reservoir geomechanics wave velocity Deere uniaxial compressive strength Reservoir Characterization strength igneous rock point load index rock type Upstream Oil & Gas Miller sandstone deformability measurement laboratory test correlation rock strength compressive strength...

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