Assessment of rock mass behavior based on its geology analysis and stress state modeling

Influence of determination error of physical and mechanical properties on stress calculation results in rock mass is discussed. The stress state of rock mass is estimated and justified with results of its structure and tectonics studies. The numerical modeling results on natural stresses in the Streltsov ore field, obtained using finite-element program analysis are presented. The modeling results are compared with in-situ measurements in the elements of underground excavations by the method of borehole slotter. The effect of change in parameters of mechanical properties of rocks on the value of calculated stresses is assessed. The geomechanical model reveals nonuniform zones of vertical and horizontal natural stresses, their nonlinear distributions at different depths and distinctions from the conventional knowledge on stress state of rock mass. The mechanism of horizontal tectonic stresses at great depths is validated, which allows prediction of rockburst hazard by geological signs. As a result, the scheme of the stress–strain behavior of the test rock mass is presented. The three-stage process is proposed for the numerical modeling of stress state in rocks mass, which makes it possible to take into account geotechnical situation at different moments of time.

Babello V. A., Beydin A. V., Smolich S. V., Ovseychuk V. A. Assessment of rock mass behavior based on its geology analysis and stress state modeling. MIAB. Mining Inf. Anal. Bull. 2019;(12):41-54. [In Russ]. DOI: 10.25018/0236-1493-2019-12-0-41-54.

V.A. Babello¹, Dr. Sci. (Eng.), Professor,
A.V. Beydin¹, Cand. Sci. (Eng.), Assistant Professor,
e-mail: beydin@mail.ru,
V.A. Ovseychuk¹, Dr. Sci. (Eng.), Professor,
e-mail: mks3115637@yandex.ru,
S.V. Smolich¹, Cand. Sci. (Eng.), Assistant Professor,
¹ Transbaikal State University, 672039, Chita, Russia.

A.V. Beydin, e-mail: beydin@mail.ru.

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