Abstract

Build-in-place (BIP) refuge alternatives (RAs) are used to provide safe havens for miners unable to escape their working area after an accident like an explosion. These underground infrastructures are built over time in various locations and might expose to mining-induced stresses. The convergences related to these stress redistributions around the mine openings might change their structural integrity and, subsequently, the explosion resistivity. Studying the effect of increasing vertical load like abutment stress on such underground mine stopping for the explosion resistance is difficult because repetitive explosion experiments on these structures are perilous and challenging. This study uses two case studies to simulate the real-time monitored abutment loading condition and the explosion testing on such steel-reinforced underground structures. A BIP RA design's performance and failure analysis were evaluated under these two conditions using 3DEC, a three-dimensional distinct element solver. This study aims to reveal the effects of vertical convergence due to panel extraction on the explosion resistance of such reinforced concrete walls. The model results demonstrate that the abutment loaded stopping shows higher deformation during and after the explosion than the models without excessive vertical loads. The stopping has high displacement levels at the top of the structure, resulting in the highest deformation zones being extremely distinctive.

Department(s)

Mining Engineering

Keywords and Phrases

Abutment; Built-in Place; Mine Explosion; Numerical Analysis; Refuge Alternative

International Standard Book Number (ISBN)

978-097949758-2

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 American Rock Mechanics Association, All rights reserved.

Publication Date

01 Jan 2023

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