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APPLIED RESEARCHES
ArticleName Justification of loading scheme and calculation procedure to determine stresses in friction rock stabilizers
DOI 10.17580/gzh.2024.01.12
ArticleAuthor Neugomonov S. S., Zubkov A. A., Kutlubaev I. M., Samigulin V. A.
ArticleAuthorData

UralEnergoResurs LLC, Magnitogorsk, Russia

S. S. Neugomonov, Technical Director, Candidate of Engineering Sciences
A. A. Zubkov, CEO, Doctor of Engineering Sciences

 

Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia
I. M. Kutlubaev, Professor, Doctor of Engineering Sciences, ptmr74@mail.ru
V. A. Samigulin, Post-Graduate Student

Abstract

Safety of mining is governed by the promptitude and quality of installation of mine support, and by the well-founded design of a support system, which conditions its load-bearing capacity. It is preferable to perform mine support system design using analytical models. This approach enjoys an active use in case of monolithic rock bolt supports reinforced with sand-and-cement and chemical mixtures. The applicability of the analytical models in these cases is stipulated by the certainty of the force interaction scheme in the rock bolt–reinforcement mixture–hole system. The article deals with the issues related to the method of calculating the load-bearing capacity of FRS anchors. The calculation is based on the determination of the friction force on the contact surface with the hole. To determine the force interaction, it is proposed to use an engineering approach based on the results of experimental studies. During their implementation, the composite models of boreholes were used. Based on the analysis of an anchor in the models of the hole, the scheme of its loading was determined. It is found that there is an enhanced interaction along the edges of the groove and the absence of contact on a significant part of the profile. An analytical model is developed, that makes it possible to calculate the load-bearing capacity of the anchor depending on its design parameters and steel grade. It is preferable to use anchors with a wall thickness of 2.5 mm and steel with a yield strength of more than 300 MPa. Experimental studies made it possible to assess the validity of using the finite elementbased modeling to assess the stress state of the anchor. A discrepancy between the generated displacements according to this model and the displacements recorded in the models of holes is found. This allows us to conclude that the assumptions made by the author of the numerical simulation A. A. Krechetov are wrong. The developed analytical method for determining the load-bearing capacity of rock bolts is experimentally approved and can be used in rock bolting design.

keywords Friction rock stabilizers, numerical simulation, loading scheme, engineering model, normal stresses, model hole, experimental studies
References

1. Liangbiao Chen, Gang Sheng, Gang Chen. Investigation of impact dynamics of roof bolting with passive friction control. International Journal of Rock Mechanics and Mining Sciences. 2014. Vol. 70. pp. 559–568.
2. Rui Wang, Jian-biao Bai, Shuai Yan, Yuan-ba Song, Guang-dong Wang. An improved numerical simulation approach for the failure of rock bolts subjected to tensile load in deep roadway. Geofluids. 2020. Vol. 2020. ID 8888390.
3. Komurlu E., Demir S. Use of Rock Mass Rating (RMR) values for support designs of tunnels excavated in soft rocks without squeezing problem. GeoScience Engineering. 2019. Vol. 65, No. 2. pp. 1–17.
4. Ranjbarnia M., Rashedi M. M., Dias D. Analytical and numerical simulations to investigate effective parameters on pre-tensioned rockbolt behavior in rock slopes. Bulletin of Engineering Geology and the Environment. 2022. Vol. 81, No. 2. DOI: 10.1007/s10064-021-02563-1
5. Xuezhen Wu, Hanfang Zheng, Yujing Jiang. Influence of joint roughness on the shear properties of energy-absorbing bolt. International Journal of Rock Mechanics and Mining Sciences. 2023. Vol. 163. 105322.
6. Prasoon Singh, Spearing A. J. S. An improved analytical model for the elastic and plastic strain-hardening shear behaviour of fully grouted rockbolts. Rock Mechanics and Rock Engineering. 2021. Vol. 54, Iss. 8. pp. 3909–3925.
7. Myrvang A., Hanssen T. H. Experiences with friction rock bolts in Norway. Rock Bolting: Theory and Application in Mining and Underground Construction : Proceedings of the international symposium. Leiden : CRC Press/Balkema, 1983.
8. Hadjigeorgiou J., Tomasone P. Characterizing the behaviour of rockbolts based on in situ pull tests. Caving 2018: Proceedings of the Fourth International Symposium on B lock and Sublevel Caving. Perth : Australian Centre for Geomechanics, 2018. pp. 727–734.
9. Hadjigeorgiou J., Thorpe S. J., Cole K. M. Quality assurance considerations for friction rock stabilizers. Mining Technology: Transactions of the Institutions of Mining and Metallurgy. 2023. Vol. 132, Iss. 1. pp. 17–29.
10. Komurlu E., Celik A. G., Gunes İ. Use of a new insertion apparatus for improving performances of the friction rock stabilizers. Mining, Metallurgy & Exploration. 2022. Vol. 39, Iss. 2. pp. 413–420.
11. Krechetov A. A. Enhancement of load-bearing capacity of roof bolting with friction rock stabilizers. Gornyi Zhurnal. 2022. No. 9. pp. 47–52.
12. Dolsak W. Technical advances of self-drilling rock reinforcement and ground control systems. Underground Facilities for Better Environment and Safety : Proceedings of the World Tunnel Congress 2008. Agra, 2008.
13. Neugebauer E. A new rock bolting concept for underground excavations under high stress conditions. Mining & Quarry World. 2010. Vol. 7, Iss. 4. p. 36.
14. Scott J. J. Friction Rock Stabilizer impact upon anchor design and ground control practices. Rock Bolting: Theory and Application in Mining and Underground Construction : Proceedings of the International Symposium. Leiden : CRC Press/Balkema, 1983.
15. Kömürlü E. Improving performances of friction rock bolts by using new spring plates. Scientific Mining Journal. 2021. Vol. 60, No. 3. pp. 131–135.
16. Komurlu E., Celik A. G., Gunes İ. Use of a New Insertion Apparatus for Improving Performances of the Friction Rock Stabilizers. Mining, Metallurgy & Exploration. 2022. Vol. 39, No. 2. pp. 413–420.
17. 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.
18. Zubkov A. A., Volkov P. V., Kutlubaev I. M., Neugomonov S. S. Improvement of engineering solutions on friction-anchored rockbolting in mine support in difficult geological conditions. Gornyi Zhurnal. 2022. No. 1. pp. 92–96.
19. Frenelus W., Peng H., Zhang J. An insight from rock bolts and potential factors influencing their durability and the long-term stability of deep rock tunnels. Sustainability. 2022. Vol. 14, Iss. 17. 10943.
20. Komurlu E., Demir S. Length effect on load bearing capacities of friction rock bolts. Periodica Polytechnica Civil Engineering. 2019. Vol. 63, No. 3. pp. 718–725.
21. Li C., Stillborg B. Analytical models for rock bolts. International Journal of Rock Mechanics and Mining Sciences. 1999. Vol. 36, Iss. 8. pp. 1013–1029.
22. Li C. C. Principles of rock bolting design. Journal of Rock Mechanics and Geotechnical Engineering. 2017. Vol. 9, Iss. 3. pp. 396–414.
23. Li C. C. Rockbolting: Principles and Applications. Oxford : Butterworth-Heinemann, 2017. 284 p.
24. Li C. C. Field observations of rock bolts in high stress rock masses. Rock Mechanics and Rock Engineering. 2010. Vol. 43, Iss. 4. pp. 491–496.
25. Weiteng Li, Xiuming Li, Yuchun Mei, Gang Wang, Wendong Yang et al. A numerical simulation approach of energy-absorbing anchor bolts for rock engineering. International Journal of Rock Mechanics and Mining Sciences. 2022. Vol. 158. 105188.
26. Weili Zhang, Lei Huang, Hsein Juang C. An analytical model for estimating the force and displacement of fully grouted rock bolts. Computers and Geotechnics. 2020. Vol. 117. 103222.
27. Danqi Li, Yingchun Li, Jianhang Chen, Hossein Masoumi. An analytical model for axial performance of rock bolts under constant confining pressure based on continuously yielding criterion. Tunnelling and Underground Space Technology. 2021. Vol. 113. 103955.
28. Zou Jin-feng, Zhang Peng-hao. Analytical model of fully grouted bolts in pull-out tests and in situ rock masses. International Journal of Rock Mechanics and Mining Sciences. 2019. Vol. 113. pp. 278–294.
29. Zubkov A. A., Kutlubaev I. M., Muhamedjarova M. S. Calculation of load-bearing capacity of tubula anchor of friction type. IOP Conference Series: Earth and Environmental Science. 2019. Vol. 272, Iss. 2. 022052.
30. OX Trade : New-generation friction rock stabilizer. Gornaya promyshlennost. 2017. No. 6. pp. 54–55.
31. Feodosev V. I. Strength of materials. : Textbook. 17Th revised edition. Moscow : Izdatelstvo MGTU im. N. E. Baumana, 2018. 542 p.
32. Feodosev V. I. Selected problems and issues on strength of materials. 5th ed., revised and enlarged. Moscow : Fizmatlit, 1996. 366 p.
33. Evans D. W. Friction bolt assembly. Patent No. AU2016/000392, WO 2017/100818 A1. Application: 09.12.2016. Publication: 22.06.2017.
34. Zubkov A. A., Zubkov A. E. Rock bolting. Patent RF, No. 95029. Applied: 25.06.2009. Published: 10.06.2010.
35. Dunaev P. F., Lelikov O. P. Design of machine parts and components : Tutorial. 11th ed. Moscow : Akademiya, 2008. 496 p.

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