Design of the shaft lining and shaft stations for deep polymetallic ore deposits: Victoria Mine case study
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KGHM Cuprum Ltd Research and Development Centre
Wroclaw University of Technology
Mining Science 2015;22:127-146
In order to properly design a shaft it is necessary to acquire full information about the rock mass in the exploration area. It is especially crucial in the case of the deposit of an unusual vertical intrusion shape, occurring at a great depth. Such a situation implies that the shaft lining design must take into consideration not only the geomechanical properties of the rock mass but also the virgin stresses (often having significant values). In this paper, the methodology of the shaft lining and shaft station lining design for a deep shaft is presented based on the Victoria Mine located in Canada. Taking into consideration the geological structure as well as the results of the laboratory tests, the properties of the rock mass were derived. Next, the numerical calculation was performed based on the elasto-plastic model of the rock mass. The numerical analysis consisted of simulation of the multistage technology of the shaft excavation and lining execution. This allowed to estimate the forces in rock bolts of the temporary ground support as well as stresses in the final concrete lining of the shaft.
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