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Scientific, Technological and Production Journal
ISSN 2079–3332 (print)
ISSN 3034-6835 (online)
founded in 2001

Stress-strain state of rock massifs around tunnels located in a dip-layered massif

Original articles: 2024 No 6

Stress-strain state of rock massifs around tunnels located in a dip-layered massif

DOI: 10.56195/20793332_2024_6_12_18

Read in pdf B. A. Botokanova1, G. S. Isaeva2
  1. Kyrgyz State Technical University named after I. Razzakov, Bishkek, Kyrgyz Republic
  2. Institute of Mechanical Engineering and Automation, National Academy of Sciences, Kyrgyz Republic
p. 12-18, No.6/2024
Abstract:
The article presents the results of a research on the stress-strain state of rock massifs around tunnels located in a dip-layered massif. As a result of the research, the authors developed a technique for determining stress fields around workings associated with the impact of water pressure in an anisotropic massif. The study was conducted using Muskhelishvili’s method, which made it possible to calculate the components of stresses and relative deformations with account of the relief, gravitational and tectonic forces, as well as the hydrostatic pressure of water. The results show that the distribution of stresses around the tunnel changes insignificantly. The stresses extend in the arch and footing, while in other areas they are compressed. High accuracy of calculations is confirmed by the permissible error. Contour stresses caused by hydrostatic pressure are of a tensile nature and can threaten less durable rocks, with a pressure of 20 to 200 MPa. The vaulted section of the tunnel with vertical walls effectively distributes loads, especially under soil and seismic impacts. When selecting the types and strength of fastening, it is important to take into account the values of water pressure and maximum tensile contour stresses. The stress-strain state of tunnels and workings is analysed with the use of the Matchad software environment. The vaulted section of the tunnel with vertical walls effectively distributes loads, especially under soil and seismic impacts. When selecting the types and strength of fastening, it is important to take into account the values of water pressure and maximum tensile contour stresses. The analysis of the stress-strain state of tunnels and working using the Matchad software environment is presented. New patterns of stress and strain distribution are established, which is important for the design and operation of transport structures. The results can be used to develop recommendations for tunnel design taking into account the forces in the massif.
Keywords:
tunnel, mine working, stresses, deformation, gravitational force, seismic force, anisotropy, hydrostatic pressure
For citation:
Botokanova B. A., Isaeva G. S. Stress-strain state of rock massifs around tunnels located in a dip-layered massif. Mine Surveying and Subsurface Use. 2024;(6):12-18. (In Russ.). https://doi.org/10.56195/20793332_2024_6_12_18.
Information about the authors:
  1. Baktygul A. Botokanova - Candidate of Technical Sciences, Associate Professor, Kyrgyz State Technical University named after I. Razzakov, 720044, Bishkek, Kyrgyz Republic, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
  2. Gulmira S. Isaeva - Candidate of Physical and Mathematical Sciences, Associate Professor, Leading Researcher, Institute of Mechanical Engineering, Automation and Geomechanics NAS KR, 720055, Bishkek, Kyrgyz Republic, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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