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Constitutive subroutine to simulate alternating loading of granular materials
153A 903178 Rock mechanics and rock acoustics Fjaer, E; Holt, R M; Raaen, A M Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 VI, P355-362. Publ Rotterdam: A A
Balkema, 1989 Acoustic data can provide useful information, especially when direct measurement of rock mechanical parameters is not possible. Acoustic velocities and attenuation show characteristic dependence on stress state. Correlations exist between strength and elastic properties and acoustic properties. Large scale inhomogeneities such as joints and fractures can also be detected by acoustic methods.
903179 Shaking table test on reinforced sand Mochizuki, Y; Fukushima, S; Kagawa, K Proc International Geoteclmicai Symposium on Theory and Practice of Earth Reinforcement, Fukuoka Kyushu, 5-7
October 1988 P!35-140. Publ Rotterdam: A A Balkema. 1988 Small shaking table tests were used to investigate the effectiveness of wire reinforcement in reducing the liquefaction potential of saturated sand. Influence of direction, spacing and stiffness of reinforcement was examined. Greatest effects are seen when accelerations are small. Narrower spacing, increased rigidity and increased areal extent of reinforcement increase its effectiveness. In these tests, horizontal reinforcement was found more beneficial than vertical.
903180 Constitutive subroutine to simulate alternating loading of granular materials Molenkamp, F Proc 6th International Conference on Numerical Methods in
Identification and classification 903182 Use of dynamic cluster analysis in a design classification method for surface mining Lin Yun-Mei; Dunbavan, M; Mallet, C; Wang Wei-Gang
Proc International Symposium on Modern Mining Technology, Taian, October 1988 P348-361. Publ Taian: Shandong Institute of Mining and Technology, 1988 Many rock mass classification methods exist to give an estimate of classes for total sampling probabilities. Dynamic cluster analysis does not rely on predetermined classes, but uses an iterative procedure to estimate an optimal number of classes and range of parametric values for each class. The classification method is presented and its application to Australian open pit mining is illustrated. Potential benefits in blast design, materials handling, and improved pit stability are considered. 903183 Applicability of rock mass classifications in the design of rockbolt support in mines Choquet, P; Charette, F
Proc ISth Canadian Rock Alechanics Symposium, Rock Engineering for Underground Excavations, 3-4 October 1988 P39-48. Publ Toronto: Unirersity of Toronto, 1988 Results are presented from survey of 57 drift sections from 10 underground mines in Quebec. Drifts were classified using six existing rock mass classifications. Rockbolt densities were assessed and related to the classification ratings. Relations between the various classifications used, comparisons between rockbolt densities found and those suggested in the literature, a suggested rockboh density to be used in underground drifts, and the line between supported and unsupported drifts are discussed.
In Situ Stress
Geomechanics, Innsbruck, 11-15 April 1988 VI, P379-384. Publ Rotterdam: A A Balkema. 1988 On cyclic loading, densification and deformation occur in granular materials. Liquefaction and cyclic mobility may result at critical water content and loading rate. An elastoplastic, kinematic hardening type constitutive model has been developed to simulate these properties in finite element analysis. Its major component simulates behaviour under cyclic deviatoric loading. The constitutive subroutine and its implementation are discussed.
903181 Wave induced pressure in poro-elastic multi-layered sea beds Kokkinowrachos, K; Herb, J Proc 6th International Symposium on Offshore Engineering,
Rio de Janeiro, 24-28 August 1987 V6, P325-344. Publ London: Pentech, 1988 Response of the seabed to the pressure field induced by surface waves is of practical importance to the design of offshore structures. An extension of previous work in this area examines wave propagation effects in a multilayered poroelastic seabed using an approach based on three dimensional Biot theory. Pressures, displacements and stresses resulting from linear and nonlinear surface waves are determined. Nonlinear waves are dominant in nearshore, shallow areas. The analytical method is illustrated and numerical results presented and evaluated.
Measurement of in situ stress 903184 Measurement of rock stress using the hydraulic fracturing method in Cornwall, U.K. - Part i. Field measurements Tunbridge, L W; Cooling, C M; Haimson, B C Int d Rock Mech Min Sci V26, N5. Sept 1989. P351-360 A new hydraulic fracturing system is presented: straddle packer system, pumping system, data measuring and logging module, impression packer system, and drilling rods. Simplicity and reliability compensate for lack'of sophisticated down hole instrumention to measure conditions in the test zone. Development and testing in boreholes to depth 700m in Carnmenellis granite at the Carwynnen test facility are described. 903185 Measurement of rock stress using the hydraulic fracturing method in Cornwall, U.K. - Part !!. Data reduction and stress calculation Haimson, B C; Tunbridge, L W; Lee, M Y; Cooling, C M
lnt ] Rock Atech LWin Sci V26, N5. Sept 1989, P361-372 Two series of hydraulic fracturing tests were carried out in granite at the Carwynnen site. one at depth 74-134m, the other at 602-685m. Measured shut-in, breakdown, and re-frac pressures are illustrated. The problem of indistinct shut-in pressures was solved using 3 indirect techniques of identifying the
'~ 1990 Pergamon Press pie. Reproduction not permitted RMMS
2"~--H
Balkema, 1989 Acoustic data can provide useful information, especially when direct measurement of rock mechanical parameters is not possible. Acoustic velocities and attenuation show characteristic dependence on stress state. Correlations exist between strength and elastic properties and acoustic properties. Large scale inhomogeneities such as joints and fractures can also be detected by acoustic methods.
903179 Shaking table test on reinforced sand Mochizuki, Y; Fukushima, S; Kagawa, K Proc International Geoteclmicai Symposium on Theory and Practice of Earth Reinforcement, Fukuoka Kyushu, 5-7
October 1988 P!35-140. Publ Rotterdam: A A Balkema. 1988 Small shaking table tests were used to investigate the effectiveness of wire reinforcement in reducing the liquefaction potential of saturated sand. Influence of direction, spacing and stiffness of reinforcement was examined. Greatest effects are seen when accelerations are small. Narrower spacing, increased rigidity and increased areal extent of reinforcement increase its effectiveness. In these tests, horizontal reinforcement was found more beneficial than vertical.
903180 Constitutive subroutine to simulate alternating loading of granular materials Molenkamp, F Proc 6th International Conference on Numerical Methods in
Identification and classification 903182 Use of dynamic cluster analysis in a design classification method for surface mining Lin Yun-Mei; Dunbavan, M; Mallet, C; Wang Wei-Gang
Proc International Symposium on Modern Mining Technology, Taian, October 1988 P348-361. Publ Taian: Shandong Institute of Mining and Technology, 1988 Many rock mass classification methods exist to give an estimate of classes for total sampling probabilities. Dynamic cluster analysis does not rely on predetermined classes, but uses an iterative procedure to estimate an optimal number of classes and range of parametric values for each class. The classification method is presented and its application to Australian open pit mining is illustrated. Potential benefits in blast design, materials handling, and improved pit stability are considered. 903183 Applicability of rock mass classifications in the design of rockbolt support in mines Choquet, P; Charette, F
Proc ISth Canadian Rock Alechanics Symposium, Rock Engineering for Underground Excavations, 3-4 October 1988 P39-48. Publ Toronto: Unirersity of Toronto, 1988 Results are presented from survey of 57 drift sections from 10 underground mines in Quebec. Drifts were classified using six existing rock mass classifications. Rockbolt densities were assessed and related to the classification ratings. Relations between the various classifications used, comparisons between rockbolt densities found and those suggested in the literature, a suggested rockboh density to be used in underground drifts, and the line between supported and unsupported drifts are discussed.
In Situ Stress
Geomechanics, Innsbruck, 11-15 April 1988 VI, P379-384. Publ Rotterdam: A A Balkema. 1988 On cyclic loading, densification and deformation occur in granular materials. Liquefaction and cyclic mobility may result at critical water content and loading rate. An elastoplastic, kinematic hardening type constitutive model has been developed to simulate these properties in finite element analysis. Its major component simulates behaviour under cyclic deviatoric loading. The constitutive subroutine and its implementation are discussed.
903181 Wave induced pressure in poro-elastic multi-layered sea beds Kokkinowrachos, K; Herb, J Proc 6th International Symposium on Offshore Engineering,
Rio de Janeiro, 24-28 August 1987 V6, P325-344. Publ London: Pentech, 1988 Response of the seabed to the pressure field induced by surface waves is of practical importance to the design of offshore structures. An extension of previous work in this area examines wave propagation effects in a multilayered poroelastic seabed using an approach based on three dimensional Biot theory. Pressures, displacements and stresses resulting from linear and nonlinear surface waves are determined. Nonlinear waves are dominant in nearshore, shallow areas. The analytical method is illustrated and numerical results presented and evaluated.
Measurement of in situ stress 903184 Measurement of rock stress using the hydraulic fracturing method in Cornwall, U.K. - Part i. Field measurements Tunbridge, L W; Cooling, C M; Haimson, B C Int d Rock Mech Min Sci V26, N5. Sept 1989. P351-360 A new hydraulic fracturing system is presented: straddle packer system, pumping system, data measuring and logging module, impression packer system, and drilling rods. Simplicity and reliability compensate for lack'of sophisticated down hole instrumention to measure conditions in the test zone. Development and testing in boreholes to depth 700m in Carnmenellis granite at the Carwynnen test facility are described. 903185 Measurement of rock stress using the hydraulic fracturing method in Cornwall, U.K. - Part !!. Data reduction and stress calculation Haimson, B C; Tunbridge, L W; Lee, M Y; Cooling, C M
lnt ] Rock Atech LWin Sci V26, N5. Sept 1989, P361-372 Two series of hydraulic fracturing tests were carried out in granite at the Carwynnen site. one at depth 74-134m, the other at 602-685m. Measured shut-in, breakdown, and re-frac pressures are illustrated. The problem of indistinct shut-in pressures was solved using 3 indirect techniques of identifying the
'~ 1990 Pergamon Press pie. Reproduction not permitted RMMS
2"~--H