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An empirical failure criterion for rocks and jointed rock masses
Abstract A new triaxial strength equation is proposed as fitting the available laboratory triaxial test data. It is shown how the five triaxial parameters - unconfined compressive, tensile and shear strengths, coefficient of friction and exponent in the triaxial equation - can be inter-related by three equations. A relation between intact rock strength/rock mass strength ratio and Barton's Rock Quality (1974) is next developed based on geomechanical data for four longwall panels and in situ coal strength data. This relation and the coefficient of internal friction from Barton's classification are used in the three inter-relations to evaluate the rest of the triaxial parameters for rock masses. Performance of the failure criterion is studied using practical cases of rock structures in coal and coal measure strata, viz. five longwall caving panels and four coal pillars.
An empirical failure criterion for rocks and jointed rock masses
Abstract A new triaxial strength equation is proposed as fitting the available laboratory triaxial test data. It is shown how the five triaxial parameters - unconfined compressive, tensile and shear strengths, coefficient of friction and exponent in the triaxial equation - can be inter-related by three equations. A relation between intact rock strength/rock mass strength ratio and Barton's Rock Quality (1974) is next developed based on geomechanical data for four longwall panels and in situ coal strength data. This relation and the coefficient of internal friction from Barton's classification are used in the three inter-relations to evaluate the rest of the triaxial parameters for rock masses. Performance of the failure criterion is studied using practical cases of rock structures in coal and coal measure strata, viz. five longwall caving panels and four coal pillars.
An empirical failure criterion for rocks and jointed rock masses
Sheorey, P.R. (author) / Biswas, A.K. (author) / Choubey, V.D. (author)
Engineering Geology ; 26 ; 141-159
1987-09-03
19 pages
Article (Journal)
Electronic Resource
English
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