Determination of steel arch support distance for roadways under the open-pit mine: a case study at the Mong Duong Coal Mine (Vietnam)

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Authors:


Tien Trung Vu*, orcid.org/0000-0002-3725-2127, Department of Underground Mining, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Doan Viet Dao, orcid.org/0000-0002-5586-7993, Department of Underground and Mining Construction, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2023, (3): 039 - 045

https://doi.org/10.33271/nvngu/2023-3/039



Abstract:



Purpose.
Nowadays, in Quang Ninh coalfield, the mining activity in quarries is increasing. For this purpose, mine roadways are dug and supported. After the mine roadways are dug, they are mainly supported by steel arches. Statistics in fact show that about 85 % of the roadway support structure at the underground coal mines in Quang Ninh are supported by the steel arch support made of SVP profile. The purpose of the study is to calculate and determine a reasonable steel support distance for the roadways located under the open-pit mine to ensure their stability and the safety of exploitation.


Methodology.
In this study, the numerical simulation method was used. On the basis of Phase2 software and geological conditions of the mine, the authors established a simulation model to determine the pressure acting on the roadway and select a reasonable support distance.


Findings.
The study considered different steel arch support structure distance following the structure of the rock mass under the 790 open-pit area at the Mong Duong Coal Mine, the internal forces in SVP steel arch support structure distance were also studied for one-lane railway and two-lane railways roadway. From the results of internal forces in the steel support structure, a reasonable SVP-22 steel arch distance was selected, which is 0.7 m for the one-lane railway roadway, as well as SVP-27, which is 0.7 m for the two-lane railway roadway.


Originality.
Using Phase2 software, the authors created a simulation model of the roadways in Seam L7 located on the West side of Mong Duong Coal Mine, which allowed analyzing and describing the condition of the surrounding rock mass. This study utilized a numerical modeling approach to simulate and establish the bending moment and axial force of both single and double lane railway roadways, across a range of support distances. Based on the results of pressure calculation for the roadways, the authors have selected a reasonable support distance for each corresponding roadway.


Practical value.
The findings of the study serve as the foundation for the practical application of production methods at the Mong Duong Coal Mine. On the basis of calculating the pressure acting on the roadways at the Seam L7 in the West Side under the 790 open-pit area, the distance of steel arch support was determined, from which the roadway support plan has been developed. This research result will also serve as a basis for other mines with similar geological conditions in Quang Ninh coalfield to consider and apply.



Keywords:
roadways, steel arch support, open-pit mine, Mong Duong Coal Mine

References.


1. Nguyen, P. M. V., Marek, R., & Hoang, D. V. (2020). Analysis of behaviour of the steel arch support in the geological and mining conditions of the Cam Pha coal basin, Vietnam. Archive of Mining Science, 65(3), 551-567. https://doi.org/10.24425/ams.2020.134134.

2. Do, N. A., Daniel, D., Dinh, V. D., Tran, T. T., Dao, V. C., Dao, V. D., & Nguyen, P. N. (2019). Behavior of Noncircular Tunnels Excavated in Stratified Rock Masses – Case of Underground Coal Mines. Journal of Rock Mechanics and Geotechnical Engineering, 11(1), 99-110. https://doi.org/10.1016/j.jrmge.2018.05.005.

3. Ozdogan, M. V., Yenice, H., Gonen, A., & Karakus, D. (2017). Optimal Support Spacing for Steel Sets: Omerler Underground Coal Mine in Western Turkey. International Journal of Geomechanics, 18(2). https://doi.org/10.1061/(ASCE)GM.1943-5622.0001069.

4. Dyczko, A. (2007). Thin coal seams, their role in the reserve base of Poland. Technical, Technological and Economic Aspects of Thin-Seams Coal Mining, 81-87. https://doi.org/10.1201/noe0415436700.ch10.

5. Ashimova, A. A., Bascetin, A., Bek, A. A., Nurpeisova, M. B., & Yes­temesov, Z. A. (2022). Creation of efficient technologies processing of man-made raw materials. Engineering Journal of Satbayev University, 144(1), 37-42. https://doi.org/10.51301/ejsu.2022.i1.06.

6. Do, T. M., Do, N. A., & Vo, T. H. (2022). Numerical analysis of the tunnel uplift behavior subjected to seismic loading. Journal of Mining and Earth Sciences, 63(3), 1-9. https://doi.org/10.46326/JMES.2022.63(3a).02.

7. Vo, T. H., Dang, V. K., Do, N. A., & Do, N. T. (2022). Study on the stability of rock mass around large underground cavern based on numerical analysis: A case study in the Cai Mep project. Journal of Mining and Earth Sciences, 63(3), 50-58. https://doi.org/10.46326/JMES.2022.63(3a).06.

8. Vu, T. T. (2022). Solutions to prevent face spall and roof falling in fully mechanized longwall at underground mines, Vietnam. Mining of Mineral Deposits, 16(1), 127-134. https://doi.org/10.33271/mining16.01.127.

9. Majcherczyk, T., & Niedbalski, Z. (2010). Numerical modeling used for designing of coal mine roadway support. New Techniques and Technologies in Mining – Proceedings of the School of Underground Mining, 77-82. https://doi.org/10.1201/b11329-14.

10. Wojciech, M. (2020). Powered support in dynamic load conditions – numerical analysis. Archive of Mining Science, 65(3), 453-468. https://doi.org/10.24425/ams.2020.134129.

11. Matayev, A. K., Lozynskyi, V. H., Musin, A., Abdrashev, R. M., Kuantay, A. S., & Kuandykova, A. N. (2021). Substantiating the optimal type of mine working fastening based on mathematical modeling of the stress condition of underground structures. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (3), 57-63, https://doi.org/10.33271/nvngu/2021-3/057.

12. Hou, C. J. (2017). Research on key technology of surrounding rock control in deep roadway. Journal of China University of Mining and Technology, 46(05), 970-978. https://doi.org/10.1155/2020/8857873.

13. Sakhno, I., Liashok, Ia., Sakhno, S., & Isaienkov, O. (2022). Method for controlling the floor heave in mine roadways of underground coal mines. Mining of Mineral Deposits, 16(4), 1-10. https://doi.org/10.33271/mining16.04.001.

14. Zhang, C., Han, K., Fang, Q., & Zhang, D. (2014). Functional catastrophe analysis of collapse mechanisms for deep tunnels based on the Hoek-Brown failure criterion. Journal of Zhejiang University-SCIENCE A, 15(9), 723-731. https://doi.org/10.1631/jzus.A1400014.

15. Dyczko, A., Kamiński, P., Jarosz, J., Rak, Z., Jasiulek, D., & Sinka, T. (2021). Monitoring of Roof Bolting as an Element of the Project of the Introduction of Roof Bolting in Polish Coal Mines-Case Study. Energies, 15(1), 95. https://doi.org/10.3390/en15010095.

16. Jiao, Y. Y., Song, L., Wang, X. Z., & Adoko, A. C. (2013). Improvement of the U-shaped steel sets for supporting the roadways in loose thick coal seam. International Journal of Rock Mechanics and Mining Sciences, (60), 19-25. https://doi.org/10.1016/j.ijrmms.2012.12.038.

17. Zhao, Y., Liu, N., Zheng, X., & Zhang, N. (2015). Mechanical model for controlling floor heave in deep roadways with U-shaped steel closed support. International Journal of Mining Science and Technology, 25(5), 713-720. https://doi.org/10.1016/j.ijmst.2015.07.003.

18. Dao, V. D., Zhao, H. C., Cao, J. T., Chen, Y., & Wang, M. (2018). Control Technology for Soft Rock Roadway in Inclined Coal Seam: a Case Study in Nui Beo Mine, Quang Ninh, Viet Nam. Internationa Journal of GEOMATE, 14(43), 175-182.

19. Dao, V. D., Xia, B., & Dinh, V. D. (2019). Control technology for coal roadway with mudstone interlayer in Nui Beo coal mine. Geomate Journal, 17(60), 259-266.

20. Krykovskyi, O., Krykovska, V., & Skipochka, S. (2021). Interaction of rock-bolt supports while weak rock reinforcing by means of injection rock bolts. Mining of Mineral Deposits, 15(4), 8-14. https://doi.org/10.33271/mining15.04.008.

21. Tian, C. D., & Bai, H. B. (2015). Impact Analysis of Roadway Size and Layout on Stability of Surrounding Rock. Safety in Coal Mines. https://doi.org/10.13347/j.cnki.mkaq.2015.08.064.

22. Vu, T. T., & Dao, V. D. (2022). Assessing the impact of underground working (tunneling) in the II section of Seam 14 on surface construction works at Ha Lam Coal Mine (Vietnam). Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (4), 39-44. https://doi.org/10.33271/nvngu/2022-4/039.

23. Vu, T. T., & Do, S. A. (2023). Determination of the rock mass displacement zone by numerical modeling method when exploiting the longwall at the Nui Beo Coal Mine, Vietnam. Mining of Mineral Deposits, 17(1), 59-66. https://doi.org/10.33271/mining17.01.059.

24. Baykenzhin, M., Asanova, Z., Rashid, Z., Kasimov, A., Ivadilinova, D., & Zhunis, G. (2022). Modeling the influence of rolled profile strengtheners on the arch support load-bearing capacity. Mining of Mineral Deposits, 16(1), 84-91. https://doi.org/10.33271/mining16.01.084.

25. Snuparek, R., & Konecny, P. (2010). Stability of roadways in coalmines alias rock mechanics in practice. Journal of Rock Mechanics and Geotechnical Engineering, 2(3), 281-288. https://doi.org/10.3724/SP.J.1235.2010.00281.

26. Pham, D. H., Le, T. D., & Nguyen, V. Q. (2020). Safe Exploitation Solution and Reduction of Reso urces Loss for the L7 Seam at the West Wing Area of the 790 Open Pit Site of the Mong Duong Coal Mine. Inżynieria Mineralna – Journal of the Polish Mineral Engineering Society, 20(1), 231-238. https://doi.org/10.29227/IM-2020-02-28.

27. Duong, D. H., Dao, H. Q., Turek, M., & Koteras, A. (2019). The status and prospect of mining technology in Vietnam underground coal mines. Inżynieria Mineralna – Journal of the Polish Mineral Engineering Society, 21(2), 146-154. https://doi.org/10.29227/IM-2019-02-68.

28. Yun, L., Helin, Z., Xiao, H., Yuhong, L., Jiufeng, W., et al. (2005). Pactical handbook of the newest regulations and general techniques for mining works. Jilin Electronic Publishing House. ISBN: 7-900359-46-6/D·6.

 

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