Cargando…

Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China

To solve these problems of poor supporting effect and serious deformation and failure of surrounding rock of mining roadway under deep mining stress, a FLAC-3D numerical calculation model is established with −800 m level no. 2424 upper roadway in the Suncun Coal Mine as the background to compare the...

Descripción completa

Detalles Bibliográficos
Autores principales: Chu, Hengbin, Li, Guoqing, Liu, Zhijun, Liu, Xuesheng, Wu, Yunhao, Yang, Shenglong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9741208/
https://www.ncbi.nlm.nih.gov/pubmed/36500161
http://dx.doi.org/10.3390/ma15238665
_version_ 1784848261274664960
author Chu, Hengbin
Li, Guoqing
Liu, Zhijun
Liu, Xuesheng
Wu, Yunhao
Yang, Shenglong
author_facet Chu, Hengbin
Li, Guoqing
Liu, Zhijun
Liu, Xuesheng
Wu, Yunhao
Yang, Shenglong
author_sort Chu, Hengbin
collection PubMed
description To solve these problems of poor supporting effect and serious deformation and failure of surrounding rock of mining roadway under deep mining stress, a FLAC-3D numerical calculation model is established with −800 m level no. 2424 upper roadway in the Suncun Coal Mine as the background to compare the stress, deformation, and failure law of surrounding rock of mining roadway under once support and multi-level support with the same support strength. It is found that the multi-level support technology has obvious advantages in the surrounding rock of the horizontal roadway on the 2424 working face. From this, the key parameters of multi-level support are determined, and the field industrial test is carried out. The results show that the overall deformation of the surrounding rock is obviously reduced after multi-level support. The displacement of the two sides is reduced by about 40%, the displacement of the roof and floor is reduced by about 30%, and the plastic zone of the roadway is reduced by about 75%. The peak value of concentrated stress decreases from 98.7 MPa to 95.8 MPa, which decreases slightly. The integrity and stability of the surrounding rock are excellent, and the support effect is satisfactory. The research can provide reference and technical support for surrounding rock control of deep high-stress mining roadways.
format Online
Article
Text
id pubmed-9741208
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-97412082022-12-11 Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China Chu, Hengbin Li, Guoqing Liu, Zhijun Liu, Xuesheng Wu, Yunhao Yang, Shenglong Materials (Basel) Article To solve these problems of poor supporting effect and serious deformation and failure of surrounding rock of mining roadway under deep mining stress, a FLAC-3D numerical calculation model is established with −800 m level no. 2424 upper roadway in the Suncun Coal Mine as the background to compare the stress, deformation, and failure law of surrounding rock of mining roadway under once support and multi-level support with the same support strength. It is found that the multi-level support technology has obvious advantages in the surrounding rock of the horizontal roadway on the 2424 working face. From this, the key parameters of multi-level support are determined, and the field industrial test is carried out. The results show that the overall deformation of the surrounding rock is obviously reduced after multi-level support. The displacement of the two sides is reduced by about 40%, the displacement of the roof and floor is reduced by about 30%, and the plastic zone of the roadway is reduced by about 75%. The peak value of concentrated stress decreases from 98.7 MPa to 95.8 MPa, which decreases slightly. The integrity and stability of the surrounding rock are excellent, and the support effect is satisfactory. The research can provide reference and technical support for surrounding rock control of deep high-stress mining roadways. MDPI 2022-12-05 /pmc/articles/PMC9741208/ /pubmed/36500161 http://dx.doi.org/10.3390/ma15238665 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chu, Hengbin
Li, Guoqing
Liu, Zhijun
Liu, Xuesheng
Wu, Yunhao
Yang, Shenglong
Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title_full Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title_fullStr Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title_full_unstemmed Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title_short Multi-Level Support Technology and Application of Deep Roadway Surrounding Rock in the Suncun Coal Mine, China
title_sort multi-level support technology and application of deep roadway surrounding rock in the suncun coal mine, china
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9741208/
https://www.ncbi.nlm.nih.gov/pubmed/36500161
http://dx.doi.org/10.3390/ma15238665
work_keys_str_mv AT chuhengbin multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina
AT liguoqing multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina
AT liuzhijun multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina
AT liuxuesheng multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina
AT wuyunhao multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina
AT yangshenglong multilevelsupporttechnologyandapplicationofdeeproadwaysurroundingrockinthesuncuncoalminechina