Individual-portal support with a pre-tensioned canopy for a coal mine roadway junction

Rotkegel, Marek; Nguyen, Phu Minh Vuong; Duong, Duc Hai

doi:10.2478/sgem-2024-0021

Abstract

This paper presents an alternative model of individual-portal support structure with a pre-tensioned canopy for coal mine roadway junctions in the geological and mining conditions of underground mines in Vietnam. The aim of the research is to determine the bearing capacity of the individual-portal support structure with various configuration. For this purpose, an analysis of the rock mass behaviour around the three-way roadway junction was carried out using the difference element method-based programme (FLAC3D). Additionally, other analysis of the bearing capacity of the selected individual-portal support structure was also conducted using the finite element method-based programme (COSMOS/M). The geological and mining conditions of Vietnamese mines were taken into account during performing these analyses. Based on the results, the optimal individual-portal support structure was proposed for the roadway junctions driven in the geological and mining conditions of underground mines in Vietnam.

References

Bednarek, Ł., Małkowski, P., Niedbalski, Z., Mucha, K. (2024). Steel Arch and Rock Bolt Support in Terms of the Gateroad Stability Maintaining behind the Longwall Face. Appl. Sci., 14, 3594. https://doi.org/10.3390/app14093594
Search in Google Scholar Back to article
Bednarek, Ł., Majcherczyk, T. (2020). An analysis of rock mass characteristics which influence the choice of support. Geomech. Eng., 21(4), 371–377. https://doi.org/10.12989/gae.2020.21.4.371
Search in Google Scholar Back to article
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
Search in Google Scholar Back to article
Duong, D.H., Nguyen, V.D., Nguyen, D.Q. (2020). Study on application of steel beams combined with pre-stressed cables against preparation road T-junction in underground coal mines of VINACOMIN. Mining Technology Bulletin, Institute of Mining Science and Technology - IMSAT, Hanoi. (in Vietnamese).
Search in Google Scholar Back to article
Duong, D.H., Dao, H.Q., Phan, V.V., Ngo, V.T. (2023). Status and prospects of fully mechanized mining technology in Vietnam coal mines from 2005 to 2020, Journal of Sustainable Mining. 22(2). https://doi.org/10.46873/2300-3960.1383
Search in Google Scholar Back to article
Duży, S., Cholewa, M. (2019). Assessment of the risk of loss of stability of the steel arch support of the underground excavations. IOP Conf. Ser.: Earth Environ. Sci. 261 012008
Search in Google Scholar Back to article
Hoek, E., Kaiser, P.K., Bawden, W.F. (1995). Support of Underground Excavation in Hard Rock, Balkema, Rotterdam.
Search in Google Scholar Back to article
Hsiao, F.Y., Wang, C.L., Chern, J.C. (2009). Numerical simulation of rock deformation for support design in tunnel intersection area, Tunnelling and Underground Space Technology, 24(1), 14–21. https://doi.org/10.1016/j.tust.2008.01.003
Search in Google Scholar Back to article
Itasca Consulting Group Inc., Minneapolis. FLAC3D, Version 5.0, (2012). Software available at www.itascacg.com
Search in Google Scholar Back to article
Jendryś, M., Duży, S., Dyduch, G. (2020). Analysis of Stress-Strain States in the Vicinity of Mining Excavations in a Rock Mass with Variable Mechanical Properties. Energies, 13, 5567. https://doi.org/10.3390/en13215567
Search in Google Scholar Back to article
Majcherczyk, T., Niedbalski, Z., Bednarek, Ł. (2018). Stability Assessment of Mining Excavations: The Impact of Large Depths. Studia Geotechnica et Mechanica, 40(3), 180 – 187. https://doi.org/10.2478/sgem-2018-0021
Search in Google Scholar Back to article
Majcherczyk, T., Niedbalski, Z., Małkowski, P., Bednarek, Ł. (2014). Analysis of Yielding Steel Arch Support with Rock Bolts in Mine Roadways Stability Aspect. Arch. Min. Sci., 59(3), 641–654. https://doi.org/10.2478/amsc-2014-0045
Search in Google Scholar Back to article
Liu, H., Li, S., Li, L., Zhang, Q. (2017). Study on deformation behaviour at intersection of adit and major tunnel in railway. KSCE J Civ Eng, 21, 2459–2466. https://doi.org/10.1007/s12205-017-2128-y
Search in Google Scholar Back to article
Mijał, W. (2018). Coal Mining and Coal Preparation in Vietnam. Inżynieria Mineralna – Journal of the Polish Mineral Engineering Society, 1(41), 275–286 (2018). https://doi.org/10.29227/IM-2018-01-40
Search in Google Scholar Back to article
Nguyen, P.M.V., Rotkegel, M., Do Van, H. (2020). Analysis of Behaviour of the Steel Arch Support in the Geological and Mining Conditions of the Cam Pha Coal Basin, Vietnam. Arch. Min. Sci. 65, 551–567. https://doi.org/10.24425/ams.2020.134134
Search in Google Scholar Back to article
Nguyen, Q.N., Nguyen, V.H., Pham, T.P. Chu, T.K.L. (2021). Current Status of Coal Mining and Some Highlights in the 2030 Development Plan of Coal Industry in Vietnam. Inżynieria Mineralna, 1(2). https://doi.org/10.29227/IM-2021-02-34
Search in Google Scholar Back to article
Niedbalski, Z., Nguyen, P.M.V., Widzyk-Capehart, E. (2018). Geomechanical Assessments of Simultaneous Operation in the Case of Transition from Open Pit to Underground Mine in Vietnam. E3S Web of Conferences 35(3):01001. https://doi.org/10.1051/e3sconf/20183501001
Search in Google Scholar Back to article
Nguyen, P.M.V., Niedbalski Z. (2016). Numerical modeling of open pit (OP) to underground (UG) transition in coal mining. Stud. Geotech. Mech., 38(3), 35–48. https://doi.org/10.1515/sgem-2016-0023
Search in Google Scholar Back to article
Rotkegel, M. (2011). Influence of the shape of portal support of working junctions on its stress state. New Techniques and Technologies in Mining ed. ByVolodymyr Bondarenko, Irina Kovalevska, Roman Dychkovskiy. Edition 1st Edition, CRC Press, 207–212.
Search in Google Scholar Back to article
Rotkegel, M. (2015). Selected examples of unconventional structures of portal support for roadway branches and intersections. Przegląd Górniczy 5/2015, 86–95, Katowice. (in Polish)
Search in Google Scholar Back to article
Rotkegel, M. (2017). Method of designing portal-frame supports for junctions of coal mine roadway. Central Mining Institute, Katowice. (in Polish)
Search in Google Scholar Back to article
Siad, I., Akchiche, M., Spyridis, P. (2023). Numerical Simulation of the Effect of Cross Passage Excavation on Surface Settlement. Geotech Geol Eng, 41, 4071–4082. https://doi.org/10.1007/s10706-023-02508-3
Search in Google Scholar Back to article
Stałęga, S. (2001). Theoretical and research background for designing frame structures of supports for intersections and branches of coal mine roadway. Prace Naukowe GIG. Nr. 845. Katowice. (in Polish)
Search in Google Scholar Back to article
Structural Research and Analysis Corporation (1999): COSMOS/M User’s Guide. Los Angeles.
Search in Google Scholar Back to article
Tran, T.M., Do, Q.T., Nguyen, Q.H., Pham, Q.N., Nguyen, V.D. (2018). Method of support design for underground construction). Hanoi University of Science and Technology, ISBN: 9786049504457. (in Vietnamese).
Search in Google Scholar Back to article
Wang, H.W., Jiang, Y.D., Xue, S., Shen, B.T., Wang, C., Lv, J.G., Yang, T. (2015). Assessment of excavation damaged zone around roadways under dynamic pressure induced by an active mining process. Int. J. Rock Mech. Min. Sci., 77, 265–277. https://doi.org/10.1016/j.ijrmms.2015.03.032
Search in Google Scholar Back to article
Xie, S.R., Pan, H., Chen, D.D., Zeng, J.C., Song, H.Z., Cheng, Q., Xiao, H.B., Yan, Z.Q., Li, Y.H. (2020). Stability analysis of integral load-bearing structure of surrounding rock of gob-side entry retention with flexible concrete formwork. Tunn. Undergr. Space Technol., 103, 103492. https://doi.org/10.1016/j.tust.2020.103492
Search in Google Scholar Back to article

Individual-portal support with a pre-tensioned canopy for a coal mine roadway junction

Abstract

Paradigm

My account