Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines
Surface subsidence induced by mineral extraction from underground mines can significantly affect the ecological environment and human life. Surface collapse is extremely hazardous and typically occurs without warning. In China, numerous surface collapses have occurred during mining operations in coa...
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Veröffentlicht in: | International journal of rock mechanics and mining sciences (Oxford, England : 1997) England : 1997), 2019-01, Vol.113, p.268-277 |
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creator | Wang, Feng Jiang, Bangyou Chen, Shaojie Ren, Mengzi |
description | Surface subsidence induced by mineral extraction from underground mines can significantly affect the ecological environment and human life. Surface collapse is extremely hazardous and typically occurs without warning. In China, numerous surface collapses have occurred during mining operations in coal mines located under thick unconsolidated layers. Via analysis of the stability of the bearing structure (arch structure in unconsolidated layers and key strata in rock strata) based on their effects on strata movement, our study reveals the formation mechanism of surface collapses and the roles played by two critical parameters: mining length and mining height. It is speculated that the bearing structure cannot be self-stable and will collapse during longwall mining with increasing mining length and mining height. As a result, the ground surface will collapse on the longwall face gob accompanied by the failure of the bearing structure. With these risks in mind, this study proposes a backfilling strip mining method via determination of the appropriate longwall face length and mining height to guard against bearing structure failure and thus avoid surface collapse. A field trial of the technique was conducted at a suitable Chinese coal mine located under thick unconsolidated layers. The maximum surface subsidence observed was only 0.369 m, which is 92% less than the subsidence in longwall face (LW) 3A04. No surface collapse occurred during the mining process. Thus, our results indicate that the proposed technique can successfully prevent surface collapse during longwall mining under thick unconsolidated layers. |
doi_str_mv | 10.1016/j.ijrmms.2018.11.006 |
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Surface collapse is extremely hazardous and typically occurs without warning. In China, numerous surface collapses have occurred during mining operations in coal mines located under thick unconsolidated layers. Via analysis of the stability of the bearing structure (arch structure in unconsolidated layers and key strata in rock strata) based on their effects on strata movement, our study reveals the formation mechanism of surface collapses and the roles played by two critical parameters: mining length and mining height. It is speculated that the bearing structure cannot be self-stable and will collapse during longwall mining with increasing mining length and mining height. As a result, the ground surface will collapse on the longwall face gob accompanied by the failure of the bearing structure. With these risks in mind, this study proposes a backfilling strip mining method via determination of the appropriate longwall face length and mining height to guard against bearing structure failure and thus avoid surface collapse. A field trial of the technique was conducted at a suitable Chinese coal mine located under thick unconsolidated layers. The maximum surface subsidence observed was only 0.369 m, which is 92% less than the subsidence in longwall face (LW) 3A04. No surface collapse occurred during the mining process. Thus, our results indicate that the proposed technique can successfully prevent surface collapse during longwall mining under thick unconsolidated layers.</description><identifier>ISSN: 1365-1609</identifier><identifier>EISSN: 1873-4545</identifier><identifier>DOI: 10.1016/j.ijrmms.2018.11.006</identifier><language>eng</language><publisher>Berlin: Elsevier Ltd</publisher><subject>Arch structure in unconsolidated layers ; Arches ; Backfill ; Backfilling strip mining ; Bearing ; Bearing structures ; Coal ; Coal mines ; Coal mining ; Collapse ; Key stratum ; Longwall mining ; Mines ; Mining ; Mining accidents & safety ; Open pit mining ; Stability analysis ; Strata ; Strip mining ; Structural stability ; Subsidence ; Surface collapse ; Underground mines</subject><ispartof>International journal of rock mechanics and mining sciences (Oxford, England : 1997), 2019-01, Vol.113, p.268-277</ispartof><rights>2018 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jan 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a357t-5fb4037b15ecda9c708b4d7c5c94c0a3cf9b68fe21c502a0771902a6c712d89a3</citedby><cites>FETCH-LOGICAL-a357t-5fb4037b15ecda9c708b4d7c5c94c0a3cf9b68fe21c502a0771902a6c712d89a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1365160918305483$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Wang, Feng</creatorcontrib><creatorcontrib>Jiang, Bangyou</creatorcontrib><creatorcontrib>Chen, Shaojie</creatorcontrib><creatorcontrib>Ren, Mengzi</creatorcontrib><title>Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines</title><title>International journal of rock mechanics and mining sciences (Oxford, England : 1997)</title><description>Surface subsidence induced by mineral extraction from underground mines can significantly affect the ecological environment and human life. Surface collapse is extremely hazardous and typically occurs without warning. In China, numerous surface collapses have occurred during mining operations in coal mines located under thick unconsolidated layers. Via analysis of the stability of the bearing structure (arch structure in unconsolidated layers and key strata in rock strata) based on their effects on strata movement, our study reveals the formation mechanism of surface collapses and the roles played by two critical parameters: mining length and mining height. It is speculated that the bearing structure cannot be self-stable and will collapse during longwall mining with increasing mining length and mining height. As a result, the ground surface will collapse on the longwall face gob accompanied by the failure of the bearing structure. With these risks in mind, this study proposes a backfilling strip mining method via determination of the appropriate longwall face length and mining height to guard against bearing structure failure and thus avoid surface collapse. A field trial of the technique was conducted at a suitable Chinese coal mine located under thick unconsolidated layers. The maximum surface subsidence observed was only 0.369 m, which is 92% less than the subsidence in longwall face (LW) 3A04. No surface collapse occurred during the mining process. Thus, our results indicate that the proposed technique can successfully prevent surface collapse during longwall mining under thick unconsolidated layers.</description><subject>Arch structure in unconsolidated layers</subject><subject>Arches</subject><subject>Backfill</subject><subject>Backfilling strip mining</subject><subject>Bearing</subject><subject>Bearing structures</subject><subject>Coal</subject><subject>Coal mines</subject><subject>Coal mining</subject><subject>Collapse</subject><subject>Key stratum</subject><subject>Longwall mining</subject><subject>Mines</subject><subject>Mining</subject><subject>Mining accidents & safety</subject><subject>Open pit mining</subject><subject>Stability analysis</subject><subject>Strata</subject><subject>Strip mining</subject><subject>Structural stability</subject><subject>Subsidence</subject><subject>Surface collapse</subject><subject>Underground mines</subject><issn>1365-1609</issn><issn>1873-4545</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK7-Aw8Fz62ZtmnaiyCLX7DgQT2HdJJquumHSSvsvzelnj3NO8M77zAPIddAE6BQ3LaJaV3X-SSlUCYACaXFCdlAybM4Zzk7DTorWAwFrc7JhfctDY604Bui3mbXSNQRDtbK0S-in9xgo7lX2kXTl8FD0GHqB2uUnLSKrDxq56P6GNUSD42x1vSfkZ-cGaPO9Etj-hAk7dJqf0nOGmm9vvqrW_Lx-PC-e473r08vu_t9LDPGp5g1dU4zXgPTqGSFnJZ1rjgyrHKkMsOmqouy0Skgo6mknEMVaoEcUlVWMtuSmzV3dMP3rP0k2mF2fTgpUiiBsyzwCa58daEbvHe6EaMznXRHAVQsPEUrVp5i4SkARKAV1u7WNR0--DHaCY9G96iVcRonoQbzf8AvkOOCDA</recordid><startdate>201901</startdate><enddate>201901</enddate><creator>Wang, Feng</creator><creator>Jiang, Bangyou</creator><creator>Chen, Shaojie</creator><creator>Ren, Mengzi</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>201901</creationdate><title>Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines</title><author>Wang, Feng ; Jiang, Bangyou ; Chen, Shaojie ; Ren, Mengzi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a357t-5fb4037b15ecda9c708b4d7c5c94c0a3cf9b68fe21c502a0771902a6c712d89a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Arch structure in unconsolidated layers</topic><topic>Arches</topic><topic>Backfill</topic><topic>Backfilling strip mining</topic><topic>Bearing</topic><topic>Bearing structures</topic><topic>Coal</topic><topic>Coal mines</topic><topic>Coal mining</topic><topic>Collapse</topic><topic>Key stratum</topic><topic>Longwall mining</topic><topic>Mines</topic><topic>Mining</topic><topic>Mining accidents & safety</topic><topic>Open pit mining</topic><topic>Stability analysis</topic><topic>Strata</topic><topic>Strip mining</topic><topic>Structural stability</topic><topic>Subsidence</topic><topic>Surface collapse</topic><topic>Underground mines</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Feng</creatorcontrib><creatorcontrib>Jiang, Bangyou</creatorcontrib><creatorcontrib>Chen, Shaojie</creatorcontrib><creatorcontrib>Ren, Mengzi</creatorcontrib><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>International journal of rock mechanics and mining sciences (Oxford, England : 1997)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Feng</au><au>Jiang, Bangyou</au><au>Chen, Shaojie</au><au>Ren, Mengzi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines</atitle><jtitle>International journal of rock mechanics and mining sciences (Oxford, England : 1997)</jtitle><date>2019-01</date><risdate>2019</risdate><volume>113</volume><spage>268</spage><epage>277</epage><pages>268-277</pages><issn>1365-1609</issn><eissn>1873-4545</eissn><abstract>Surface subsidence induced by mineral extraction from underground mines can significantly affect the ecological environment and human life. Surface collapse is extremely hazardous and typically occurs without warning. In China, numerous surface collapses have occurred during mining operations in coal mines located under thick unconsolidated layers. Via analysis of the stability of the bearing structure (arch structure in unconsolidated layers and key strata in rock strata) based on their effects on strata movement, our study reveals the formation mechanism of surface collapses and the roles played by two critical parameters: mining length and mining height. It is speculated that the bearing structure cannot be self-stable and will collapse during longwall mining with increasing mining length and mining height. As a result, the ground surface will collapse on the longwall face gob accompanied by the failure of the bearing structure. With these risks in mind, this study proposes a backfilling strip mining method via determination of the appropriate longwall face length and mining height to guard against bearing structure failure and thus avoid surface collapse. A field trial of the technique was conducted at a suitable Chinese coal mine located under thick unconsolidated layers. The maximum surface subsidence observed was only 0.369 m, which is 92% less than the subsidence in longwall face (LW) 3A04. No surface collapse occurred during the mining process. Thus, our results indicate that the proposed technique can successfully prevent surface collapse during longwall mining under thick unconsolidated layers.</abstract><cop>Berlin</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijrmms.2018.11.006</doi><tpages>10</tpages></addata></record> |
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subjects | Arch structure in unconsolidated layers Arches Backfill Backfilling strip mining Bearing Bearing structures Coal Coal mines Coal mining Collapse Key stratum Longwall mining Mines Mining Mining accidents & safety Open pit mining Stability analysis Strata Strip mining Structural stability Subsidence Surface collapse Underground mines |
title | Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines |
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