Articles | Volume 7, issue 2
https://doi.org/10.5194/se-7-493-2016
https://doi.org/10.5194/se-7-493-2016
Research article
 | 
01 Apr 2016
Research article |  | 01 Apr 2016

The Mohr–Coulomb criterion for intact rock strength and friction – a re-evaluation and consideration of failure under polyaxial stresses

Abigail Hackston and Ernest Rutter

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Short summary
This was an experimental study of the strength of two rock types, over a range of pressure conditions that correspond to depths in the Earth’s crust ranging up to 12 km. Tests were carried out under different stress regimes to simulate extremes of the range of loading geometries encountered in the Earth and hence how these affect failure strength and resistance to frictional slip on faults. These experiments will promote understanding of rock behaviour in oil, gas and water reservoirs.