ON ONE METHOD OF SPECIFICATION OF THE COULOMB-MOHR STRENGTH CRITERION
Keywords:
Mohr-Coulomb criterion, rocks, shear angle, Mohr circles, three-dimensional stress state, dilatancy, Tresca criterionAbstract
This article examines a computational and experimental method for specifying the phenomenological Mohr-Coulomb strength criterion for semi-brittle geomaterials exhibiting dilatancy under triaxial compression. The authors propose an algorithm for determining the position of slip planes and shear angles based on recording the transition point from the Mohr-Coulomb condition to the Tresca criterion. It is shown that using standard uniaxial compression test data in combination with linear interpolation of strength parameters enables the highly accurate construction of Mohr's limit circles and their common envelope.
References
1. Ставрогин А.Н., Протосеня А.Г. Пластичность горных пород. — М.: Недра, 1979.
2. Тарасов Б.Г. Закономерности деформирования и разрушения горных пород при высоких давлениях. Автореферат. дис. на соиск. ... д-ра техн. наук. – СПб., 1991.
3. Рычков Б.А., Кондратьева Е.И., Маматов Ж.Б. Дилатансия геоматериалов с учетом разупрочнения // Вестник Самарского гос. ун-та. – 2004. – Спец. вып.
4. Погорелов А.В. Дифференциальная геометрия. – М.: Наука, 1974.
