Failure Mechanisms of Rheological Coal Roadway
The roadway instability in deep underground conditions has attracted constant concerns in recent years, as it seriously affects the efficiency of coal mining and the safety of personnel. The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mecha...
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Veröffentlicht in: | Sustainability 2020-04, Vol.12 (7), p.2885 |
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description | The roadway instability in deep underground conditions has attracted constant concerns in recent years, as it seriously affects the efficiency of coal mining and the safety of personnel. The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mechanism of such roadways is still not clear. In this study, based on a typical soft coal roadway in the field, the in-situ measurements and rock mass properties were obtained. The rheological deformation of that roadway was revealed. Then a time-dependent 3D numerical model was established and verified. Based on the verified model, the deformation properties and evolutionary failure mechanism of deep coal roadway were investigated in detail. The results showed that the deformation of the soft coal roadway demonstrated rheological behavior and the applied support structures failed completely. After roadway excavation, the maximum and minimum stresses around the roadway deteriorated gradually with the increase of time. The failure zones in soft coal mass expanded increasingly over time, which had a negative effect on roadway stability in the long-term. According to the findings, helpful suggestions were further presented to control the rheological deformation in the roadway. This research systematically reveals the instability mechanism of the deep coal roadway and provides some strategies for maintaining roadway stability, which can significantly promote the sustainability of mining in deep underground coal mines. |
doi_str_mv | 10.3390/su12072885 |
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The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mechanism of such roadways is still not clear. In this study, based on a typical soft coal roadway in the field, the in-situ measurements and rock mass properties were obtained. The rheological deformation of that roadway was revealed. Then a time-dependent 3D numerical model was established and verified. Based on the verified model, the deformation properties and evolutionary failure mechanism of deep coal roadway were investigated in detail. The results showed that the deformation of the soft coal roadway demonstrated rheological behavior and the applied support structures failed completely. After roadway excavation, the maximum and minimum stresses around the roadway deteriorated gradually with the increase of time. The failure zones in soft coal mass expanded increasingly over time, which had a negative effect on roadway stability in the long-term. According to the findings, helpful suggestions were further presented to control the rheological deformation in the roadway. This research systematically reveals the instability mechanism of the deep coal roadway and provides some strategies for maintaining roadway stability, which can significantly promote the sustainability of mining in deep underground coal mines.</description><identifier>ISSN: 2071-1050</identifier><identifier>EISSN: 2071-1050</identifier><identifier>DOI: 10.3390/su12072885</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Coal ; Coal mines ; Coal mining ; Convergence ; Deformation ; Engineering ; Excavation ; Failure mechanisms ; Geology ; Lithology ; Mathematical models ; Mines ; Mining accidents & safety ; Numerical models ; Occupational safety ; Rheological properties ; Rheology ; Rock masses ; Simulation ; Stability ; Sustainability ; Underground mines ; Underground mining ; Underground roadways</subject><ispartof>Sustainability, 2020-04, Vol.12 (7), p.2885</ispartof><rights>2020. 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Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a318t-c85a4226ca9ad36930f1f45930b96ca6fa195e8614d8d7b5d08f8aa8295eb4203</citedby><cites>FETCH-LOGICAL-a318t-c85a4226ca9ad36930f1f45930b96ca6fa195e8614d8d7b5d08f8aa8295eb4203</cites><orcidid>0000-0001-9241-9367 ; 0000-0002-9046-3492 ; 0000-0002-3572-2682</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Sun, Yuantian</creatorcontrib><creatorcontrib>Li, Guichen</creatorcontrib><creatorcontrib>Zhang, Junfei</creatorcontrib><creatorcontrib>Xu, Jiahui</creatorcontrib><title>Failure Mechanisms of Rheological Coal Roadway</title><title>Sustainability</title><description>The roadway instability in deep underground conditions has attracted constant concerns in recent years, as it seriously affects the efficiency of coal mining and the safety of personnel. The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mechanism of such roadways is still not clear. In this study, based on a typical soft coal roadway in the field, the in-situ measurements and rock mass properties were obtained. The rheological deformation of that roadway was revealed. Then a time-dependent 3D numerical model was established and verified. Based on the verified model, the deformation properties and evolutionary failure mechanism of deep coal roadway were investigated in detail. The results showed that the deformation of the soft coal roadway demonstrated rheological behavior and the applied support structures failed completely. After roadway excavation, the maximum and minimum stresses around the roadway deteriorated gradually with the increase of time. The failure zones in soft coal mass expanded increasingly over time, which had a negative effect on roadway stability in the long-term. According to the findings, helpful suggestions were further presented to control the rheological deformation in the roadway. This research systematically reveals the instability mechanism of the deep coal roadway and provides some strategies for maintaining roadway stability, which can significantly promote the sustainability of mining in deep underground coal mines.</description><subject>Coal</subject><subject>Coal mines</subject><subject>Coal mining</subject><subject>Convergence</subject><subject>Deformation</subject><subject>Engineering</subject><subject>Excavation</subject><subject>Failure mechanisms</subject><subject>Geology</subject><subject>Lithology</subject><subject>Mathematical models</subject><subject>Mines</subject><subject>Mining accidents & safety</subject><subject>Numerical models</subject><subject>Occupational safety</subject><subject>Rheological properties</subject><subject>Rheology</subject><subject>Rock masses</subject><subject>Simulation</subject><subject>Stability</subject><subject>Sustainability</subject><subject>Underground mines</subject><subject>Underground mining</subject><subject>Underground roadways</subject><issn>2071-1050</issn><issn>2071-1050</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpNUMFKAzEUDKJgqb34BQvehK15ySabHGWxKlSEoufwdpPYLdumJl2kf2-kgs7hzTAM82AIuQY651zTuzQCozVTSpyRSVZQAhX0_J--JLOUNjSDc9AgJ2S-wH4YoyteXLfGXZ-2qQi-WK1dGMJH3-FQNCGfVUD7hccrcuFxSG72y1Pyvnh4a57K5evjc3O_LJGDOpSdElgxJjvUaLnUnHrwlcjc6mxKj6CFUxIqq2zdCkuVV4iKZbetGOVTcnPq3cfwObp0MJswxl1-aRhXtRBcSJFTt6dUF0NK0Xmzj_0W49EANT-TmL9J-DdnWFEy</recordid><startdate>20200401</startdate><enddate>20200401</enddate><creator>Sun, Yuantian</creator><creator>Li, Guichen</creator><creator>Zhang, Junfei</creator><creator>Xu, Jiahui</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>4U-</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0001-9241-9367</orcidid><orcidid>https://orcid.org/0000-0002-9046-3492</orcidid><orcidid>https://orcid.org/0000-0002-3572-2682</orcidid></search><sort><creationdate>20200401</creationdate><title>Failure Mechanisms of Rheological Coal Roadway</title><author>Sun, Yuantian ; Li, Guichen ; Zhang, Junfei ; Xu, Jiahui</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a318t-c85a4226ca9ad36930f1f45930b96ca6fa195e8614d8d7b5d08f8aa8295eb4203</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Coal</topic><topic>Coal mines</topic><topic>Coal mining</topic><topic>Convergence</topic><topic>Deformation</topic><topic>Engineering</topic><topic>Excavation</topic><topic>Failure mechanisms</topic><topic>Geology</topic><topic>Lithology</topic><topic>Mathematical models</topic><topic>Mines</topic><topic>Mining accidents & safety</topic><topic>Numerical models</topic><topic>Occupational safety</topic><topic>Rheological properties</topic><topic>Rheology</topic><topic>Rock masses</topic><topic>Simulation</topic><topic>Stability</topic><topic>Sustainability</topic><topic>Underground mines</topic><topic>Underground mining</topic><topic>Underground roadways</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sun, Yuantian</creatorcontrib><creatorcontrib>Li, Guichen</creatorcontrib><creatorcontrib>Zhang, Junfei</creatorcontrib><creatorcontrib>Xu, Jiahui</creatorcontrib><collection>CrossRef</collection><collection>University Readers</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Sustainability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sun, Yuantian</au><au>Li, Guichen</au><au>Zhang, Junfei</au><au>Xu, Jiahui</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Failure Mechanisms of Rheological Coal Roadway</atitle><jtitle>Sustainability</jtitle><date>2020-04-01</date><risdate>2020</risdate><volume>12</volume><issue>7</issue><spage>2885</spage><pages>2885-</pages><issn>2071-1050</issn><eissn>2071-1050</eissn><abstract>The roadway instability in deep underground conditions has attracted constant concerns in recent years, as it seriously affects the efficiency of coal mining and the safety of personnel. The large rheological deformations normally occur in deep roadway with soft coal mass. However, the failure mechanism of such roadways is still not clear. In this study, based on a typical soft coal roadway in the field, the in-situ measurements and rock mass properties were obtained. The rheological deformation of that roadway was revealed. Then a time-dependent 3D numerical model was established and verified. Based on the verified model, the deformation properties and evolutionary failure mechanism of deep coal roadway were investigated in detail. The results showed that the deformation of the soft coal roadway demonstrated rheological behavior and the applied support structures failed completely. After roadway excavation, the maximum and minimum stresses around the roadway deteriorated gradually with the increase of time. The failure zones in soft coal mass expanded increasingly over time, which had a negative effect on roadway stability in the long-term. 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subjects | Coal Coal mines Coal mining Convergence Deformation Engineering Excavation Failure mechanisms Geology Lithology Mathematical models Mines Mining accidents & safety Numerical models Occupational safety Rheological properties Rheology Rock masses Simulation Stability Sustainability Underground mines Underground mining Underground roadways |
title | Failure Mechanisms of Rheological Coal Roadway |
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