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Keywords: strength data
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Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0866
... often presented in terms of the well-known empirical HB criterion. However, for the most part, the uncertainties associated with both the fitted criterion and strength predictions based on it have historically been ignored. One aspect of fitting the HB criterion to strength data that has received much...
Proceedings Papers

Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-623
... Abstract The uniaxial compressive strength data is used in the mine design to develop input parameters for rock mass classification. The purpose of this study is to develop a correlation between the compressive strength and other index tests for various rock units for a proposed mine. The...
Proceedings Papers

Paper presented at the 48th U.S. Rock Mechanics/Geomechanics Symposium, June 1–4, 2014
Paper Number: ARMA-2014-7192
... Abstract In this paper we apply to intact rock the four-parameter polyaxial criterion originally proposed by Ottosen [1] for modelling the peak strength of concrete. The Ottosen criterion is fitted to strength data at both the triaxial compression and triaxial extension stress states, and we...
Proceedings Papers

Paper presented at the The 42nd U.S. Rock Mechanics Symposium (USRMS), June 29–July 2, 2008
Paper Number: ARMA-08-137
... in rock mechanics design mainly because of its numerical stability when conducting an elastic-plastic analysis. A few studies were conducted in the past to check the validity of the Drucker-Prager criterion by comparing against a limited amount of lab strength data. In this paper, more polyaxial...
Proceedings Papers

Paper presented at the 19th U.S. Symposium on Rock Mechanics (USRMS), May 1–3, 1978
Paper Number: ARMA-78-0608
... theory of plasticity including that of normality. A close match with peek strength data for a wide range of strain-softening rocks can be obtained from the critical state criterion, providing some evidence of the validity and usefulness of the approach. INTRODUCTION Calculations made to predict the...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0257
... area ranging in size from 3 to 16 in. have been tested. A relationship between the cubical and cylindrical specimens is given; and an example for determining pillar sizes using strength data obtained from exploration boreholes is outlined. INTRODUCTION The design and implementation of a modern coal...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0125
... found to adequately fit both the peak and residual strength data. A constant relation between peak and residual angles of friction was observed. The values of c and f obtained for the six U.S. coals tested are presented and compared to previously published data on British coals. Significant differences...

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