Abstract
Most sedimentary rocks have layered structure, and their strength properties are therefore anisotropic; as a consequence, the rock strength depends on the direction of the applied stresses. In this case, various fracture mechanisms are possible. The following two possible fracture mechanisms are considered: actions along the bedding planes, which are weakening surfaces, and along the planes where stresses exceeding the total rock strength are attained. A triaxial independent loading test bench was used to study the fracture conditions for layered rocks composed of productive oil-and-gas strata in complex true triaxial loading tests. The study shows a good qualitative agreement between experimental results and theoretical estimates.
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Original Russian Text © V.I. Karev, D.M. Klimov, Yu.F. Kovalenko, K.B. Ustinov, 2016, published in Izvestiya Akademii Nauk, Mekhanika Tverdogo Tela, 2016, No. 5, pp. 15–21.
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Karev, V.I., Klimov, D.M., Kovalenko, Y.F. et al. Fracture of sedimentary rocks under a complex triaxial stress state. Mech. Solids 51, 522–526 (2016). https://doi.org/10.3103/S0025654416050022
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DOI: https://doi.org/10.3103/S0025654416050022