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Year 2022
 
Issue 2 [04 - 2022], Year XXXI

Stabilization of deep roadways in weak rocks using the system of two-level rock bolts

https://mij.hoimovietnam.vn/en/archives?article=22023

  • Affiliations:

    Trường Đại học Mỏ-Địa chất

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  • Received: 21st-July-2021
  • Revised: 18th-Aug-2021
  • Accepted: 5th-Feb-2021
  • Online: 30th-Apr-2022
Pages: 16 - 23
Views: 105
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Abstract:

Large deformation control techniques for deep roadways in the soft rocks were big problems in mining activities not only in Viet Nam but also in the other countries in the world. The excavation of roadway leads to high deviator stress, which exceeds the peak strength of shallow surrounding rock and causes it to enter the post-failure stage. Tensile failures then initiate and develop around the roadways, which causes the fragmentation, dilation and separation of shallow surrounding rock. In fact, the capacity of the primary support system is low, which results in the serious contraction in the full section of roadways. This requires must be found solutions to prevent the development of deformation of rock mass around roadways, as well as technical solutions to stabilize for deep roadways. To stability analysis of roadways can be applied some methods such as: analytical, experimental and selling experimental, and numerical methods. Nowadays, with their advantages numerical methods are widely applied to analyze failure mechanism of rock mass as well as the design rock support in roadways. The results of numerical modellings are quite intuitive and lively which help designers quickly change input parameters conditions and can be considered many factors in the models. This paper introduces prevention mechanism of large deformation of rock mass around roadways by using the system of 2-level rock bolts.

How to Cite
Tran, M.Tuan, Do, T.Ngoc, Dang, T.Trung and Nguyen, P.Duyen 2022. Stabilization of deep roadways in weak rocks using the system of two-level rock bolts (in Vietnamese). Mining Industry Journal. XXXI, 2 (Apr, 2022), 16-23. .
References

1. Võ Trọng Hùng, Phùng Mạnh Đắc. (2006). Cơ học đá ứng dụng trong xây dựng công trình ngầm và khai thác mỏ. NXB Khoa học kỹ thuật

2. Trần Tuấn Minh nnk. (2018). Phương pháp tính toán kết cấu chống giữ công trình ngầm. NXB Bách Khoa Hà Nội

3. Nguyễn Quang Phích. (2007). Cơ học đá. NXB Xây Dựng

4. Đỗ Như Tráng. (2011). Về bài toán xác định kết cấu chống đỡ của hầm bằng phương pháp khống chế hội tụ theo tiêu chuẩn phá hủy Hoek-Brown. Tạp chí Cầu đường.

5. Carranza-Torres, C. (2004). Elasto-plastic solution of tunnel problems using the generalized form of the Hoek-Brown failure criterion. International Journal of Rock Mechanics and Mining Sciences, Proceedings of the ISRM SINOROCK 2004 Symposium, edited by J.A. Hudson and Xia- Ting Feng, Volume 41, Issue 3.

6. Lee, Y-K. and Pietruszczak, S. (2014). A new numerical procedure for elasto-plastic analysis of a circular opening excavated in a strain-softening rock mass. Tunnelling and Underground Space Technology, Vol. 23, No. 5, 588-599.

7. Panet, M. (1995). Calcul des Tunnels par la Méthode de Convergence-Confinement. Presses de l’Ecole Nationale des Ponts et Chaussés. Paris. 178p.

8. Vlachopoulos, N. and Diederichs, M.S. (2009). Improved longitudinal displacement profiles for convergence-confinement analysis of deep tunnels. Rock Mechanics and Rock Engineering (Accepted- In Press) 16 pgs.

9. Vrakas A. (2016). A finite strain solution for the elastoplastic ground response curve in tunnelling: rocks with non-linear failure envelopes. International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 41(7), 1077-1090.

10. Lei Fan, Weijun Wang, Chao Yuan, Wenqing Peng. Research on large deformation mechanism of deep roadway with dynamic pressure. Energy Sci Eng. 2020; 00:1–17. wileyonlinelibrary.com/journal/ ese3. DOI: 10.1002/ese3.672

11. В.А. Еременко, Е.А. Разумов, Д.Ф. Заятдинов, 2012. Современные технологии анкерного крепления. Горная книга 2012. 656с. ISBN 978-5-98672-291-7.

12. Министерство топлива и энергетики российской федерации Российская Академия Наук. Инструкция по расчет и применению анкерной крепи на угольных шахтах России. С.-Петербург 2000.

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