Considerations on stability of open stopes in 'Jama Bor' underground mine
Razmatranje stabilnosti otvorenih otkopa u Jami Rudnika Bakra Bor
Abstract
Dominant ore bodies in 'Jama Bor' underground mine in last few years, from the aspect of production and engaged resources, have a common characteristic that after being mined out, excavated areas remained open. These are following ore bodies: T, T1 and T2. Mining in ore body T had been ended two years ago and the stope was supposed to be backfilled after the end of excavation. However, process of backfilling did not start yet. Applied mining method in currently active ore bodies, T1 and T2, is pillar mining in horizontal slices, with leaving open voids after the end of extraction. Existence of voids in underground mines is always a challenge, regarding stability and safety. In considerations of stability of open stopes in 'Jama Bor', there are several key factors: rock mass properties, stope geometry, support properties and interaction between installed support and surrounding rock. Contemporary approach applied in each phase of the process, including determination of rock properties, mine design, mining operations, support installation and monitoring of stope stability during and after the excavation, enables accurate and reliable defining of stope stability. Also, such approach enables early detection of possible endangerments in stope stability, thus providing possibility for prevention and securing of endangered zones. Since the future of underground mining in RTB Bor is related deep lying ore deposits, bellow current operations, importance of their stability is even bigger.References
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Rock Engineering, 29(3), pp.125-143.
HOEK, E. and BROWN, E.T. (1980) Underground Excavations in Rock. London: Institution of Mining and Metallurgy.
LARSEN VESTAD, M. (2014) Analysis of the Deformation Behavior at the Underground Caverns of Neelum Jhelum HPP, Pakistan. (MSc), Norwegian University of Science and Technology.
LISJAK, A. et al. (2014) Fracture development around deep underground excavations: Insights from FDEM modeling. Journal of Rock Mechanics and Geotechnical Engineering, 6 (2014), pp. 493-505.
MARTIN, C.D. et al. (2003) Stress, instability and design of underground excavations. International Journal of Rock Mechanics & Mining Sciences, 40
(2003) pp.1027–1047.
MUIRWOOD, A.M. (1972) Tunnels for roads and motorways. Quart. J. Eng.Geol.5, pp.119-120.
PANTHI, K.K. (2006) Analysis of engineering geological uncertanities related to tunneling in Himalayan rock mass conditions. (PhD), Norwegian
University of Science and Technology.
RDS GRUPA D.O.O. (2010) Mine design of ore body T in Jama Bor (in Serbian). Bor: RdS Grupa.
RDS GRUPA D.O.O. (2012) Mine design of ore bodies T1 and T2 in Jama Bor (in Serbian). Bor: RdS Grupa.
Technical documentation of RTB Bor.
UNIVERSITY OF BELGRADE, FACULTY OF MINING AND GEOLOGY (2010) Design of roof support in ore body T of Jama Bor (in Serbian). Belgrade: Faculty of Mining and Geology.
UNIVERSITY OF BELGRADE, FACULTY OF MINING AND GEOLOGY (2012) Engineering and geotechnical elaboration on ore bodies T1 and T2 in Jama Bor (in Serbian). Belgrade: Faculty of Mining and Geology.
Published
2015-12-31
How to Cite
Svrkota, I., Milić, V., Petrović, D., Đukanović, D., & Denić, M. (2015). Considerations on stability of open stopes in ’Jama Bor’ underground mine. Podzemni Radovi, (27), 31-39. https://doi.org/10.5937/podrad1527031S
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