Influence of adhesion on stress-strain condition alongside of a full column resin cartridge rock bolt
1
AGH University of Science and Technology
2
Donetsk National Technical University
Mining Science 2021;28:233-245
KEYWORDS
TOPICS
Technology of deposit excavation in underground and strip miningMine engineering and construction, underground construction
ABSTRACT
The article highlights the research pertaining to the problem of reinforcement of underground excavations with bolting system, using chemical method based on resin cartridges, which currently is a global trend in mines. Theoretical model of rock bolt installed in a rockmass was discussed and described with proper formulas for explanation the role of single discontinuity and its mechanism affecting stress-strain characteristics of the reinforcement system, based on an adhesive method. The presented model has been verified with results of numerical modelling of stress-strain and deformation composition of the "rock bolt/resin cartridge/rock block" system, depending on the bond coefficient of the mixture which fixes the rock bolt. The analysis of the modelling results showed that for the stress-strain conditions of the rock bolt, too high a bond between the bolt and the rock is dangerous (critical), as it leads to high local tensile and deformation stresses.
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| eISSN: | 2353-5423 |
| ISSN: | 2300-9586 |
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