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ArticleName Enhancement of load-bearing capacity of roof bolting with friction rock stabilizers
DOI 10.17580/gzh.2022.09.08
ArticleAuthor Krechetov A. A.
ArticleAuthorData

Gorbachev Kuzbass State Technical University, Kemerovo, Russia:

A. A. Krechetov, Associate Professor, Candidate of Engineering Sciences, krechetovaa@kuzstu.ru

Abstract

A lot of scientific efforts are aimed at improving efficiency of rock bolting with friction rock stabilizers nowadays. One of the ways in this field is the use of a friction rock stabilizer with a W-shaped crosssection, designed by OKS Company. The use of this friction rock stabilizer type allows increasing the capacity of the roof support without the use of any additional materials and the need to perform additional operations. The paper presents the results of evaluating the maximum allowable loads, the stress–strain behavior and the spacer force when installing friction rock stabilizers in boreholes with the most common C-shaped cross-section with a wall thickness of 3 mm and with a W-shaped cross-section with a wall thickness of 2 mm, 2.5 mm and 3 mm. It is shown that, all other conditions being equal, the bearing capacity of the friction rock stabilizer with the W-shaped cross-section and the wall thickness of 2 mm, 2.5 mm and 3 mm is 1.6, 2 and 3.6 times greater than the load-bearing capacity of the stabilizer with the C-shaped cross-section and the wall thicknesses of 3 mm, respectively. It is proposed to use the ratio of the created spacer force to the mass of the stabilizer to assess the section effectiveness from the point of view of metal consumption. For the C-profile friction rock stabilizer with the wall thickness of 3 mm, this value is 57 kN/kg, for the W-profile friction rock stabilizer, this value is 109 kN/kg, 114 kN/kg and 157 kN/kg when its wall thickness is 2 mm, 2.5 mm and 3 mm, respectively.

keywords Roof bolting, friction rock stabilizer, load-bearing capacity, spacer force
References

1. Zubkov A. A., Latkin V. V., Neugomonov S. S., Volkov P. V. Prospective methods of support of mine excavations at underground mines. Conditions of Sustainable Development of Russian Mineral Industry. Moscow : Gornaya kniga, 2014. Iss. 1. pp. 106–117.
2. Rahimi B., Sharifzadeh M., Feng X.-T. Ground behaviour analysis, support system design and con struction strategies in deep hard rock mining – Justified in Western Australian’s mines. Journal of Rock Mechanics and Geotechnical Engineering. 2020. Vol. 12, Iss. 1. pp. 1–20.
3. Ghorbani M., Shahriar K., Sharifzadeh M., Masoudi R. A critical review on the developments of rock support systems in high stress ground conditions. International Journal of Mining Science and Technology. 2020. Vol. 30, Iss. 5. pp. 555–572.
4. Li C. C. Principles and methods of rock support for rockburst control. Journal of Rock Mechanics and Geotechnical Engineering. 2021. Vol. 13, Iss. 1. pp. 46–59.
5. Toscano-Alor C., Castillo-Rodil A., Pehovaz-Alvarez H., Raymundo C., Mamani-Macedo N. et al. Hydrabolt and Split Set Rock Bolt Selection Method Under the Bieniawski Rock Mass Rating for Improving Horizontal Access Support in Peruvian Mid-Scale Mining Activities. Advances in Human Factors, Business Management and Leadership : Proceedings of the AHFE 2020 Virtual Conferences. Series: Advances in Intelligent Systems and Computing. Cham : Springer, 2020. Vol. 1209. pp. 359–365.
6. Li C. C. Principles of rockbolting design. Journal of Rock Mechanics and Geotechnical Engineering. 2017. Vol. 9, Iss. 3. pp. 396–414.
7. Li C. C. Rockbolting: Principles and Applications. Oxford : Butterworth-Heinemann, 2017. 284 p.
8. Tomory P. B., Grabinsky M. W., Curran J. H., Carvalho J. Factors influencing the effectiveness of Split Set friction stabilizer bolts. Cim Bulletin. 1998. Vol. 91, No. 1018. pp. 205–214.
9. Nicholson L., Hadjigeorgiou J. Interpreting the results of in situ pull tests on Friction Rock Stabilizers (FRS). Mining Technology. 2018. Vol. 127, Iss. 1. pp. 12–25.
10. Davison G. R., Fuller P. G. Investigation of expanding Split Sets. Ground Support 2013 : Proceedings of the Seventh International Symposium on Ground Support in Mining and Underground Construction. Perth : Australian Centre for Geomechanics, 2013. pp. 163–170.
11. Zubkov A. A., Zubkov A. V., Kutlubaev I. M., Latkin V. V. Improvement of friction rock bolt anchorage design and installation. Gornyi Zhurnal. 2016. No. 5. pp. 48–52. DOI: 10.17580/gzh.2016.05.05
12. Zubkov A. A., Kalmykov V. N., Kutlubaev I. M., Naydenova M. S. Validation of friction-anchored rock bolt characteristics. GIAB. 2019. No. 10. pp. 35–43.
13. Stimpson B. Split Set friction stabilizers: an experimental study of strength distribution and the effect of corrosion. Canadian Geotechnical Journal. 1998. Vol. 35, No. 4. pp. 678–683.
14. Shuai Xu, Zhengming Yang, Ming Cai, Pengyuan Hou. An experimental study on the anchoring characteristics of an innovative self-swelling Split-set. Tunnelling and Underground Space Technology. 2021. Vol. 112. 103919. DOI: 10.1016/j.tust.2021.103919
15. Yang Hao, Yu Wu, Ranjith P. G., Kai Zhang, Guan Hao et al. A novel energy-absorbing rock bolt with high constant working resistance and long elongation: Principle and static p ull-out test. Construction and Building Materials. 2020. Vol. 243. 118231. DOI: 10.1016/j.conbuildmat.2020.118231
16. Cai M., Champaigne D., Coulombe J. G., Challagulla K. Development of two new rockbolts for safe and rapid tunneling in burst-prone ground. Tunnelling and Underground Space Technology. 2019. Vol. 91. 103010. DOI: 10.1016/j.tust.2019.103010
17. Kopytov A. I., Voytov M. D., Tripus T. E. Calculation of tubular friction type bolt on carrying capacity. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta. 2012. No. 4(92). pp. 8–10.
18. Masaev Yu. A., Politov A. P., Kopytov A. I., Masaev V. Yu. Improving roof bolting structures for mine opening constructions. Vestnik Nauchnogo tsentra VostNII po promyshlennoy i ekologicheskoy bezopasnosti. 2018. No. 4. pp. 66–73.
19. Pershin V. V., Fadeev Yu. A., Tripus T. E. Substantiation of parameters and development of a new construction of multilayer anchor of frictional type. Izvestiya vuzov. Gornyi zhurnal. 2016. No. 2. pp. 47–53.
20. Zubkov A. A., Zubkov A. E., Zhdanova Yu. I. Reinforced self-fixing anchor support. Patent RF, No. 168801. Applied: 25.08.2016. Published: 21.02.2017. Bulletin No. 6.
21. Kopytov A. I., Lebedev A. A., Utrobin B. A. Development of rational technology of supporting mine workings in rock bumps hazardous conditions. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta. 2017. No. 5(123). pp. 10–14.
22. OKS-Trade: New-generation friction rock stabilizer. Gornaya promyshlennost. 2017. No. 6(136). pp. 54–55.

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