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Shaft Wall Damage of High Depth Inclined Ore-Pass under Impact Wear Behavior
Version 1
: Received: 31 October 2023 / Approved: 31 October 2023 / Online: 31 October 2023 (09:04:53 CET)
A peer-reviewed article of this Preprint also exists.
Jiang, L.; Ji, H.; Xue, L. Shaft Wall Damage to High-Depth Inclined Ore Passes under Impact Wear Behavior. Appl. Sci. 2023, 13, 13065. Jiang, L.; Ji, H.; Xue, L. Shaft Wall Damage to High-Depth Inclined Ore Passes under Impact Wear Behavior. Appl. Sci. 2023, 13, 13065.
Abstract
In order to study the collapse failure of shaft wall of high depth inclined ore-pass under ore impact wear behavior, 25 ore-passes in a deep mine in Yunnan, China were investigated. Considering the ore-pass structural characteristics and the impact wear effect of ore on shaft wall, the shaft wall damage model of high depth inclined ore-pass is constructed based on the contact mechanics theory. Furthermore, No. 1#, 2#, 3# and 9# ore-passes of the mine are taken as examples for analysis, and the three results of theoretical analysis, numerical simulation and engineering case are used for comparison and verification. The shaft wall damage degree is predicted, and the damage mechanism between total shaft wall damage volume Qtol and ore-pass depth H, ore-pass dip angle θ, inclined angle of chute α, shaft diameter D and ore block size P is quantitatively investigated. The results show that the rationality of the proposed model is verified by numerical analysis and field engineering situations. Moreover, the deeper ore-pass depth H, the more shaft wall damage volume Qtol with the increase of collision frequency. Qtol increases exponentially with P and increases gradually with D. With the increase of θ or α, Qtol increases generally first and then decreases. Therefore, Qtol can be effectively reduced by selecting the appropriate structure parameters of ore-pass and adopting the technology of drilling straight ore-pass. This work provides technical support for long period safe operation of high depth inclined ore-pass.
Keywords
Shaft wall damage model; High depth inclined ore-pass; Ore-pass structure parameters; Ore block size; Impact wear behavior
Subject
Engineering, Mining and Mineral Processing
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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