Numerical simulation of influence parameters on induced stresses distribution during first weighting process of longwall mining
Article
Article Title | Numerical simulation of influence parameters on induced stresses distribution during first weighting process of longwall mining |
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Article Category | Article |
Authors | Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza and Mirzaghorbanali, Ali |
Journal Title | Iranian Journal of Mining Engineering |
Journal Citation | 16 (53), pp. 1-16 |
Number of Pages | 16 |
Year | 2022 |
Publisher | Iranian Society of Mining Engineering (IRSME) |
Place of Publication | Iran |
ISSN | 1735-7616 |
2676-4482 | |
Digital Object Identifier (DOI) | https://doi.org/10.22034/ijme.2021.115543.1757 |
Web Address (URL) | https://ijme.iranjournals.ir/article_244629.html?lang=en |
Abstract | Investigation of first weighting process due to greater caving span and higher induced stresses when compared to the periodic ones is imperative in the planning stage of a longwall coal mining project. Hence, a reliable prediction of caving span and abutment pressure during this process has major role in stability analysis of operation. This paper presents the results of numerical simulation intended to examine stress distribution in terms of peak abutment pressures during first weighting process in longwall mining. Longwall mining was simulated by incorporating Universal Distinct Element Code (UDEC) to investigate the effects of five critical parameters included roof strata uniaxial compressive strength, immediate roof height, spacing of bedding planes and mining depth and in-situ stresses ratio on vertical and horizontal peak abutment pressures. The results showed that relationships between all critical parameters with the exception of in-situ stresses ratio and front and rear abutment pressures in vertical and horizontal directions are the same. In addition, it was concluded that all parameters have a direct relationship with the rear and front abutment pressures whereas this relationship is indirect for the immediate roof height and the extraction height. |
Keywords | Induced stresses, Discontinuous numerical simulation; Longwall mining; First weighting process; Universal Distinct Element Code (UDEC); Discontinuous numerical simulation |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401902. Geomechanics and resources geotechnical engineering |
Byline Affiliations | Shahrood University of Technology, Iran |
University of Southern Queensland |
https://research.usq.edu.au/item/zx427/numerical-simulation-of-influence-parameters-on-induced-stresses-distribution-during-first-weighting-process-of-longwall-mining
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