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Vol 190
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A new technique for the determination of ultimate strength in extention of rocks

V. A. Korshunov1
Yu. M. Kartashov2
About authors
  • 1 — Saint Petersburg State Mining Institute (Technical University)
  • 2 — Saint Petersburg State Mining Institute (Technical University)
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A new technique has been developed for the determination of ultimate strength in uniaxial extension by testing results of samples of arbitrary shape. This technique consists in the sample failure with spherical indentors and measuring of sizes of rupture surfaces and zones of failured rocks at contacts with indentors for the subsequent estimation of ultimate stress state. The revised formulas were obtained for calculation of ultimate strength in uniaxial extension with using the method of sample failure with spherical indentors, essentially improving the accuracy of the technique.

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  1. Гончаров И.Г. Прочность каменных материалов в условиях различных напряженных состояний. Л.-М.: Государственное изд-во литературы по строительству, архитектуре и строительным материалам, 1960. 124 с.
  2. Коршунов В.А. Определение показателей объемной прочности образцов горных пород при их нагружении сферическими инденторами / В.А.Коршунов, Ю.М.Карташов // Труды Международной конференции. Геотехника. Оценка состояния оснований и сооружений / ВНИИГ. Том 1. СПб, 2001. С.33-41.
  3. Suggested methods for determining tensile strength of rock materials. Part 2: Suggested method for determining indirect tensile strength by the Brazil test // Int. J. Rock Mech. Min. Sci. and Geotech. Abstr. Vol.15. Pergamon Press Ltd. 1978. Р.99-103.

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