Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Latin American journal of solids and structures (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252021000800510 |
Resumo: | Abstract The lithology and thickness of the rock beam affect its mechanical properties and acoustic emission characteristics when it is fractured. In this study, three-point bending tests of rock beams were carried out. Then, we proposed to utilize the percentage of peak energy to characterize the intensity of energy release during fracture. Finally, the energy release mechanism of coal roof fracture was discussed. The evolution process of acoustic emission includes five stages. The acoustic emission amplitude distribution of rock beams has three typical patterns. Most of the cracks after fracture are tensile cracks, the proportion of tensile cracks is positively correlated with the elastic modulus. The percentage of peak energy is positively correlated with thickness and elastic modulus. More energy is released when thick and hard roof fractures. When necessary, measures such as reducing the thickness or the strength of the roof could be taken to improve the safety of mining. |
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Latin American journal of solids and structures (Online) |
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Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknessesRock beam fracturethree-point bending testacoustic emissionAE energycrack modeAbstract The lithology and thickness of the rock beam affect its mechanical properties and acoustic emission characteristics when it is fractured. In this study, three-point bending tests of rock beams were carried out. Then, we proposed to utilize the percentage of peak energy to characterize the intensity of energy release during fracture. Finally, the energy release mechanism of coal roof fracture was discussed. The evolution process of acoustic emission includes five stages. The acoustic emission amplitude distribution of rock beams has three typical patterns. Most of the cracks after fracture are tensile cracks, the proportion of tensile cracks is positively correlated with the elastic modulus. The percentage of peak energy is positively correlated with thickness and elastic modulus. More energy is released when thick and hard roof fractures. When necessary, measures such as reducing the thickness or the strength of the roof could be taken to improve the safety of mining.Associação Brasileira de Ciências Mecânicas2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252021000800510Latin American Journal of Solids and Structures v.18 n.8 2021reponame:Latin American journal of solids and structures (Online)instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)instacron:ABCM10.1590/1679-78256711info:eu-repo/semantics/openAccessZhao,Tong-binZhang,Peng-feiGuo,Wei-yaoXiao,Ya-xunZhao,Yong-qiangSun,Xiangeng2021-11-29T00:00:00Zoai:scielo:S1679-78252021000800510Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=1679-7825&lng=pt&nrm=isohttps://old.scielo.br/oai/scielo-oai.phpabcm@abcm.org.br||maralves@usp.br1679-78251679-7817opendoar:2021-11-29T00:00Latin American journal of solids and structures (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)false |
dc.title.none.fl_str_mv |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
title |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
spellingShingle |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses Zhao,Tong-bin Rock beam fracture three-point bending test acoustic emission AE energy crack mode |
title_short |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
title_full |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
title_fullStr |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
title_full_unstemmed |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
title_sort |
Research on mechanical properties and acoustic emission characteristics of rock beams with different lithologies and thicknesses |
author |
Zhao,Tong-bin |
author_facet |
Zhao,Tong-bin Zhang,Peng-fei Guo,Wei-yao Xiao,Ya-xun Zhao,Yong-qiang Sun,Xiang |
author_role |
author |
author2 |
Zhang,Peng-fei Guo,Wei-yao Xiao,Ya-xun Zhao,Yong-qiang Sun,Xiang |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Zhao,Tong-bin Zhang,Peng-fei Guo,Wei-yao Xiao,Ya-xun Zhao,Yong-qiang Sun,Xiang |
dc.subject.por.fl_str_mv |
Rock beam fracture three-point bending test acoustic emission AE energy crack mode |
topic |
Rock beam fracture three-point bending test acoustic emission AE energy crack mode |
description |
Abstract The lithology and thickness of the rock beam affect its mechanical properties and acoustic emission characteristics when it is fractured. In this study, three-point bending tests of rock beams were carried out. Then, we proposed to utilize the percentage of peak energy to characterize the intensity of energy release during fracture. Finally, the energy release mechanism of coal roof fracture was discussed. The evolution process of acoustic emission includes five stages. The acoustic emission amplitude distribution of rock beams has three typical patterns. Most of the cracks after fracture are tensile cracks, the proportion of tensile cracks is positively correlated with the elastic modulus. The percentage of peak energy is positively correlated with thickness and elastic modulus. More energy is released when thick and hard roof fractures. When necessary, measures such as reducing the thickness or the strength of the roof could be taken to improve the safety of mining. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252021000800510 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252021000800510 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1679-78256711 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Ciências Mecânicas |
publisher.none.fl_str_mv |
Associação Brasileira de Ciências Mecânicas |
dc.source.none.fl_str_mv |
Latin American Journal of Solids and Structures v.18 n.8 2021 reponame:Latin American journal of solids and structures (Online) instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM |
instname_str |
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
instacron_str |
ABCM |
institution |
ABCM |
reponame_str |
Latin American journal of solids and structures (Online) |
collection |
Latin American journal of solids and structures (Online) |
repository.name.fl_str_mv |
Latin American journal of solids and structures (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
repository.mail.fl_str_mv |
abcm@abcm.org.br||maralves@usp.br |
_version_ |
1754302890850123776 |