Application of Numerical and Block Geomechanical Modelling to Determine Parameters of Large-Section Chambers
- Sonnov M.A.1, Trofimov A.V.2, Rumyantsev A.E.2, Shpilev S.V.2
1 Fidesys LLS, Moscow, Russian Federation
2 Gipronickel Institute, St. Petersburg, Russian Federation
Russian Mining Industry №2 / 2021 р. 127-131
Abstract: The study is exemplified by complex workings of a main ore pass that include a variety of underground structures, usually with unique dimensions which depend on the function and size of the equipment placed. The technical solutions for the underground crushing plant and associated structures envisage construction of chambers with the height of up to 35 m and the width of up to 20 m at the depths exceeding 800-1000 m. Such conditions call for a closer attention to be paid to the mine support parameters, especially the bolting depth. A block geomechanical model was designed in the Micromine Mining Software for the rock mass of the new main ore pass. Geotechnical boreholes logs and results of physical and mechanical rock tests were used as the input data for the model. Four domains were identified in the block geomechanical model for subsequent numerical modelling. A 3D model of the stress-and-strain state of the rock mass was made using the CAE Fidesys software based on the Micromine wire-frame model of the main ore pass. The history of the rock mass incremental loading was reconstructed for correct simulation of its stress-and-strain state. Prior to the excavation, the rock mass is pre-stressed by the weight of the rock strata. The excavation phase was then simulated in the stepwise manner. An array of points with the values of maximum principal stresses was downloaded from the numerical model post-processing program and interpolated into the block geomechanical model to refine the SRF parameter of the Barton's Q rating. Based on the obtained Q values, the mine support parameters for chambers were determined using the Barton, Hutchinson and Potvin empirical methods.
Keywords: rock mass, bolting, rock pressure, excavation, ore pass, underground structures, bolting depth, rock bolt, geomechanical block model, numerical modelling, stress-and-strain state, physical and mechanical properties, Micromine, CAE Fidesys
For citation: Sonnov M.A., Trofimov A.V., Rumyantsev A.E., Shpilev S.V. Application of Numerical and Block Geomechanical Modelling to Determine Parameters of Large-Section Chambers. Gornaya promyshlennost = Russian Mining Industry. 2021;(2): 127–131. (In Russ.) DOI: 10.30686/1609-9192-2021-2-127-131.
Article info
Received: 15.02.2021
Revised: 24.02.2021
Accepted: 26.02.2021
Information about the author
Maxim A. Sonnov – full-fledged member of the Academy of Mining Sciences, Deputy Director General, Fidesys LLS, Moscow, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Andrey V. Trofimov – Candidate of Technical Sciences, Head of Physical and Mechanical Testing Centre, Gipronickel Institute, St. Petersburg, Russian Federation; ORCID: https://orcid.org/0000-0001-7557-9801; This email address is being protected from spambots. You need JavaScript enabled to view it..
Alexandr E. Rumyantsev – Candidate of Technical Sciences, Leading Research Associate, Gipronickel Institute, St. Petersburg, Russian Federation; ORCID: https://orcid.org/0000-0002-2204-961X; This email address is being protected from spambots. You need JavaScript enabled to view it..
Sergey V. Shpilev – Chief Project Engineer, Gipronickel Institute, St. Petersburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
References
1. Marysyuk V.P., Sabyanin G.V., Trofimov A.V., Kirkin A.P. Designing blast patterns by calculation of fracture zones and ore zoning by physical and mechanical properties. Gornyi Zhurnal. 2020;(1):62–66. (In Russ.) DOI: 10.17580/gzh.2020.01.12.
2. Sonnov M.A., Rumyantsev A.E., Trofimov A.V., Vilchitskiy V.B., Kirkin A.P., Bazhenova A.V. Selection of the location for ore pass construction on the basis of finiteAelement modeling with the use of CAE Fidesys software suite. Gornaya promyshlennost = Russian Mining Industry. 2019;(1):70–73. (In Russ.) DOI: 10.30686/1609-9192-2019-1-143-56-59.
3. Kokoev S.G., Yusupov G.A., Feoktistov A.Yu., Trofimov A.V., Rumyantsev A.E., Kuzmin S.V. Substantiation of the main ore pass parameters based on discrete-element modeling. MIAB. Mining Inf. Anal. Bull. 2019;(S37):158–167. (In Russ.)
4. Barton N., Grimstad E. Forty years with the Q-system in Norway and abroad. Fjellsprengningsteknikk NFF Oslo; 2014. 25p. Available at: https://ru.scribd.com/document/358170884/Barton-N-and-Grimstad-E-2014-Forty-Years-With-the-Q-System-in-Norway-and-Abroad-Fjellsprengningsteknikk-NFF-Oslo-25p
5. Nickson S.D. Cable support guidelines for underground hard rock mine operations. MASc. thesis, Dept. Mining and Mineral Processing, University of British Columbia; 1992. Available at: https://open.library.ubc.ca/cIRcle/collections/ubctheses/831/items/1.0081080
6. Potvin Y., Milne D. Empirical cable bolt support design. In: Kaiser P.K., McCreath D.R. (eds) Rock Support in mining and underground construction, proc. Int. symp. On rock support, Sudbury. Rotterdam: A.A. Balkema; 1992, pp. 269–275.
