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Keywords: failure criterion
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-494
... ABSTRACT: Application of the Hoek-Brown failure criterion to New Zealand hard greywacke rocks leads to unrealistically high predictions of rock mass strength for better quality rock masses and lower predictions for poorer quality rock masses. To further investigate linkages between rock masses...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-183
... r s o o f M o h r s c i r c l e c a n b e e x p r e s s e d b y e q u a t i o n ( 4 ) . d 2 = ( s o - s ) 2 + ( 1 - s / s t ) 2 / a · t R 2 . ( 4 ) Figure 4 : Proposed failure criterion and dmin T o d e t e r m i n e d m i n t h e f o l l o w i n g e q u a t i o n i s f i r s t o b t a i n e d a c...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-413
... profiles the stability analyses were carried out. As for the input data of stability analyses the results of triaxial, rotation and direct shear tests along with the modified Hoek&Brown failure criterion were used. The critical failure was also accurately determined by means of inclination measurements...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-034
... effect on the estimates obtained of the material properties. The results of a recent analysis of a large data base of test results is then presented. This demonstrates that there are inadequacies in the Hoek-Brown empirical failure criterion as currently proposed for intact rock and, by inference...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-019
..., an empirical failure criterion for rock was used. After determination of the relaxed zone by measurement at certain locations, it is shown that the calculated relaxed zone coincides with the above result. Accordingly, the complete relaxed area of rocks arounn a tunnel can be determined. 1 INTRODUCTION The main...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-053
... with the program MAUS taking into account the nonlinear, time and temperature dependent behaviour of the rock salt. A failure criterion was also considered. The results of the numerical analyses show that the thermal load induces a clearly higher closure rate of the drift but only a minor additional load...
Proceedings Papers

Paper presented at the ISRM International Symposium, May 26–28, 1982
Paper Number: ISRM-IS-1982-045
... directly from strains evaluated by the measured displacements, without analyzing stress distributions around a cavern. The practical examples are shown to demonstrate an applicability of this technique. The failure criterion of rock and soil masses is also discussed in connection with the proposed...
Proceedings Papers

Paper presented at the ISRM International Symposium, May 26–28, 1982
Paper Number: ISRM-IS-1982-046
.... extensometer failure criterion bedrock shelter Reservoir Characterization criterion Hervanta rock mass reservoir geomechanics Thickness civilian use Rock Stress Measurement hockey calculation air-raid shelter London construction shelter bedrock shelter ofhervanta roof area fracture...

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