Determining displacements of boundary of underground openings after drivage

Geomechanical problem solving needs information on displacement of boundaries in underground openings after drivage. These data are used in development and verification of problem solutions. The situation is complicated by the fact that displacements are unknown as they take place simultaneously with formation of an underground opening. The proposed approach uses the borehole stress-relief method with simultaneous measurement of displacements on both sides of the borehole. The borehole simulates the boundary of an underground opening. Displacements of the boundaries of the core characterize deformation of intact rock mass, while displacements of the boundary on the other side of the borehole are reflective of the fact of the underground opening formation. The total displacements define the total displacements of the boundary of an underground opening at the moment of its formation. The approach also involves the geometrical similarity method connected with physical simulation of the boundary of an underground opening. The measured displacements are applicable in the stress–strain analysis of the boundary and the adjacent rock mass in elasticity and inelasticity, plasticity and in post-limiting deformation.

Chanyshev A. I., Abdulin I. M. Determining displacements of boundary of underground openings after drivage. MIAB. Mining Inf. Anal. Bull. 2023;(10):20-30. [In Russ]. DOI: 10.25018/0236_1493_2023_10_0_20.

The study was supported by the Russian Science Foundation, Project No. 22-17-00188.

A.I. Chanyshev¹, Dr. Sci. (Phys. Mathem.), Professor, Chief Researcher; Novosibirsk State University of Economics and Management, 630099, Novosibirsk, Russia, e-mail: a.i.chanyshev@gmail.com,
I.M. Abdulin¹, Researcher,
¹ Chinakal Institute of Mining Siberian Branch of Russian Academy of Sciences, 630091, Novosibirsk, Russia.

A.I. Chanyshev, e-mail: a.i.chanyshev@gmail.com.

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