Face Stability in Heavy Clay: Theory and Practice

The authors focus on feasibility of reducing deformation of surrounding rock mass around underground structures by means of advanced reinforcement of tunnel faces in claystone. The reinforcement efficiency is estimated in 3D calculations. The factors to influence deformation in rock mass ahead of a...

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Bibliographic Details
Published in:Journal of mining science 2022-04, Vol.58 (2), p.234-245
Main Authors: Lebedev, M. O., Karasev, M. A., Belyakov, N. A., Basova, L. A.
Format: Article
Language:English
Subjects:
Bolting
Deformation
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Mechanical properties
Mineral Mining Technology
Mineral Resources
Rock
Rock bolting
Rock bolts
Rock masses
Rocks
Stiffness
Tunnels
Underground structures
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Summary:The authors focus on feasibility of reducing deformation of surrounding rock mass around underground structures by means of advanced reinforcement of tunnel faces in claystone. The reinforcement efficiency is estimated in 3D calculations. The factors to influence deformation in rock mass ahead of a tunnel faces include: rock bolt length, rock bolting system stiffness and the bolt pattern. An additional factor of concern is the mechanical characteristics of claystone. The implemented research shows the highest influence is exerted on deformation in rock mass by the bolt pattern and the rock bolting system stiffness. The efficient design of advanced rock bolting is determined.
ISSN:1062-7391
1573-8736
DOI:10.1134/S1062739122020077