Correlations between direct and indirect strength test methods 被引量：1

Correlations between direct and indirect strength test methods

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摘要 The difficulties associated with performing direct compression strength tests on rocks lead to the development of indirect test methods for the rock strength assessment. Indirect test methods are simple, more economical, less time-consuming, and easily adaptable to the field. The main aim of this study was to derive correlations between direct and indirect test methods for basalt and rhyolite rock types from Carlin trend deposits in Nevada. In the destructive methods, point load index, block punch index, and splitting tensile strength tests are performed. In the non-destructive methods, Schmidt hammer and ultrasonic pulse velocity tests are performed. Correlations between the direct and indirect compression strength tests are developed using linear and nonlinear regression analysis methods. The results show that the splitting tensile strength has the best correlation with the uniaxial compression strength.Furthermore, the Poisson's ratio has no correlation with any of the direct and indirect test results. The difficulties associated with performing direct compression strength tests on rocks lead to the devel-opment of indirect test methods for the rock strength assessment. Indirect test methods are simple, more economical, less time-consuming, and easily adaptable to the field. The main aim of this study was to derive correlations between direct and indirect test methods for basalt and rhyolite rock types from Carlin trend deposits in Nevada. In the destructive methods, point load index, block punch index, and splitting tensile strength tests are performed. In the non-destructive methods, Schmidt hammer and ultrasonic pulse velocity tests are performed. Correlations between the direct and indirect compression strength tests are developed using linear and nonlinear regression analysis methods. The results show that the splitting tensile strength has the best correlation with the uniaxial compression strength. Furthermore, the Poisson’s ratio has no correlation with any of the direct and indirect test results.

作者 Kallu Raj Roghanchi Pedram

机构地区 Department of Mining Engineering

出处《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第3期355-360,共6页 矿业科学技术学报（英文版）

基金 CDC/NIOSH for their partial funding of this work

关键词测试方法岩石强度直接和间接劈裂抗拉强度单轴压缩强度回归分析方法强度测试 Uniaxial compression strength test Indirect strength test methods Correlation Regression analysis

分类号 TD315 [矿业工程—矿井建设]

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1U|usay R, Gokceog|u C, Su|ukcu S. Draft ISRM suggested method for determining block punch strength index (BPI). lnt J Rock Mech Min Sci 2001 ;38(8): 1113-20.
2Aksoy CO, Ozacar V, Demirel N, Ozer SC, Safak S. Determination of instantaneous breaking .rate by geological strength index, block punch index, and power of impact hammer for various rock mass conditions. J Tunnel Undergr Space Technol 2011 ;26(4)'534-40.
3ASTM. Standard test method for splitting tensile strength of intact rock core specimens. ASTM Stand D3967-08; 2008.
4ASTM. Standard test method for determination of rock hardness by rebound Hammer method. ASTM Stand. D5873-00; 2005.
5Sharma PK, Singh TN. A correlation between P-wave velocity, impact strength index, slake durability index, and uniaxial compressive strength. J Bull Eng Geol Environ 2008;67(1):17-22.
6ASTM. Standard test method for laboratory determination of pulse velocities and ultrasonic elastic constants of rock. ASTM Stand. D2845-08; 2008.
7Miller RP. Engineering classification and index properties for intact rock. Illinois: University of Illinois (Urbana-Champaign Campus); 1965.
8Barton N, Choubey V. The shear strength of rock joints in theory and practice. Rock Mech 1977;10(1-2):1-54.
9Aydin A. ISRM suggested method for determination of the Schmidt hammer rebound hardness: revised version, lnt J Rock Mech Min Sci 2009:46(3):627-34.
10Goodman RE. Introduction to rock mechanics. New York: Wiley; 1989.