Assessment of cemented waste rock backfill for recycling gangue and controlling strata: creep experiments and models
Filling mining with cemented waste rock backfill (CWRB) is an optimal approach to eliminate the gangue waste pollution. To efficiently evaluate the gangue recycling and its advantage in structure protection, the effects of the confining pressure, cement dosage, and aggregate particle size distributi...
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| Veröffentlicht in: | Environmental science and pollution research international 2021-07, Vol.28 (27), p.35924-35940 |
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| creator | Wu, Jiangyu Jing, Hongwen Meng, Qingbin Yin, Qian Yu, Liyuan |
| description | Filling mining with cemented waste rock backfill (CWRB) is an optimal approach to eliminate the gangue waste pollution. To efficiently evaluate the gangue recycling and its advantage in structure protection, the effects of the confining pressure, cement dosage, and aggregate particle size distribution (PSD) on the creep behavior of CWRB were investigated. Burgers creep model was used to characterize the visco-elastic characteristics of CWRB, a visco-elastic-plastic creep model was established to describe its creep behavior on this basis. A genetic algorithm (GA) for optimizing the model parameters was constructed to verify the creep model. The time-varying evolutions of strata movements were discussed to evaluate the effect of the creep behavior of CWRB on the structural safeties. The results show that the creep load levels and times are positively correlated with the confining pressure and cement dosage, indicating that the consideration of roof load without confining pressure of surrounding rock causes an increase in the design parameters of CWRB to waste the cementing material. The creep load levels and times firstly increase and then decrease with the Talbot gradation index, revealing that CWRB with superior aggregate PSD performs the strong anti-deformation capacity under creep condition. The confining pressure, cement dosage, and aggregate PSD are comprehensively considered to optimize CWRB, and its stability under creep condition causes the strata movement to gradually slow down, thereby protecting underground aquifers and surface buildings. |
| doi_str_mv | 10.1007/s11356-021-12944-4 |
| format | Article |
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To efficiently evaluate the gangue recycling and its advantage in structure protection, the effects of the confining pressure, cement dosage, and aggregate particle size distribution (PSD) on the creep behavior of CWRB were investigated. Burgers creep model was used to characterize the visco-elastic characteristics of CWRB, a visco-elastic-plastic creep model was established to describe its creep behavior on this basis. A genetic algorithm (GA) for optimizing the model parameters was constructed to verify the creep model. The time-varying evolutions of strata movements were discussed to evaluate the effect of the creep behavior of CWRB on the structural safeties. The results show that the creep load levels and times are positively correlated with the confining pressure and cement dosage, indicating that the consideration of roof load without confining pressure of surrounding rock causes an increase in the design parameters of CWRB to waste the cementing material. The creep load levels and times firstly increase and then decrease with the Talbot gradation index, revealing that CWRB with superior aggregate PSD performs the strong anti-deformation capacity under creep condition. The confining pressure, cement dosage, and aggregate PSD are comprehensively considered to optimize CWRB, and its stability under creep condition causes the strata movement to gradually slow down, thereby protecting underground aquifers and surface buildings.</description><identifier>ISSN: 0944-1344</identifier><identifier>EISSN: 1614-7499</identifier><identifier>DOI: 10.1007/s11356-021-12944-4</identifier><identifier>PMID: 33686603</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Aggregates ; algorithms ; Aquatic Pollution ; Aquifers ; Atmospheric Protection/Air Quality Control/Air Pollution ; Backfill ; Cement ; Cementing ; Civil engineering ; Confining ; Creep (materials) ; Design parameters ; Dosage ; Earth and Environmental Science ; Ecotoxicology ; Environment ; Environmental Chemistry ; Environmental Health ; Environmental science ; Evaluation ; Gangue ; Genetic algorithms ; Mathematical models ; Mining ; Optimization ; Particle size ; Particle size distribution ; pollution ; Pressure ; Pressure effects ; Recycling ; Research Article ; Rocks ; Size distribution ; Strata ; Sustainable development ; Viscoelasticity ; Waste Water Technology ; Water Management ; Water Pollution Control</subject><ispartof>Environmental science and pollution research international, 2021-07, Vol.28 (27), p.35924-35940</ispartof><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature 2021</rights><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c408t-f0a29f09005ad1503c1a235bca2445476f97186000b90b743f292c61b86c073a3</citedby><cites>FETCH-LOGICAL-c408t-f0a29f09005ad1503c1a235bca2445476f97186000b90b743f292c61b86c073a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11356-021-12944-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11356-021-12944-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33686603$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wu, Jiangyu</creatorcontrib><creatorcontrib>Jing, Hongwen</creatorcontrib><creatorcontrib>Meng, Qingbin</creatorcontrib><creatorcontrib>Yin, Qian</creatorcontrib><creatorcontrib>Yu, Liyuan</creatorcontrib><title>Assessment of cemented waste rock backfill for recycling gangue and controlling strata: creep experiments and models</title><title>Environmental science and pollution research international</title><addtitle>Environ Sci Pollut Res</addtitle><addtitle>Environ Sci Pollut Res Int</addtitle><description>Filling mining with cemented waste rock backfill (CWRB) is an optimal approach to eliminate the gangue waste pollution. To efficiently evaluate the gangue recycling and its advantage in structure protection, the effects of the confining pressure, cement dosage, and aggregate particle size distribution (PSD) on the creep behavior of CWRB were investigated. Burgers creep model was used to characterize the visco-elastic characteristics of CWRB, a visco-elastic-plastic creep model was established to describe its creep behavior on this basis. A genetic algorithm (GA) for optimizing the model parameters was constructed to verify the creep model. The time-varying evolutions of strata movements were discussed to evaluate the effect of the creep behavior of CWRB on the structural safeties. The results show that the creep load levels and times are positively correlated with the confining pressure and cement dosage, indicating that the consideration of roof load without confining pressure of surrounding rock causes an increase in the design parameters of CWRB to waste the cementing material. The creep load levels and times firstly increase and then decrease with the Talbot gradation index, revealing that CWRB with superior aggregate PSD performs the strong anti-deformation capacity under creep condition. The confining pressure, cement dosage, and aggregate PSD are comprehensively considered to optimize CWRB, and its stability under creep condition causes the strata movement to gradually slow down, thereby protecting underground aquifers and surface buildings.</description><subject>Aggregates</subject><subject>algorithms</subject><subject>Aquatic Pollution</subject><subject>Aquifers</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Backfill</subject><subject>Cement</subject><subject>Cementing</subject><subject>Civil engineering</subject><subject>Confining</subject><subject>Creep (materials)</subject><subject>Design parameters</subject><subject>Dosage</subject><subject>Earth and Environmental Science</subject><subject>Ecotoxicology</subject><subject>Environment</subject><subject>Environmental Chemistry</subject><subject>Environmental Health</subject><subject>Environmental science</subject><subject>Evaluation</subject><subject>Gangue</subject><subject>Genetic algorithms</subject><subject>Mathematical models</subject><subject>Mining</subject><subject>Optimization</subject><subject>Particle size</subject><subject>Particle size distribution</subject><subject>pollution</subject><subject>Pressure</subject><subject>Pressure effects</subject><subject>Recycling</subject><subject>Research Article</subject><subject>Rocks</subject><subject>Size distribution</subject><subject>Strata</subject><subject>Sustainable development</subject><subject>Viscoelasticity</subject><subject>Waste Water Technology</subject><subject>Water Management</subject><subject>Water Pollution 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of cemented waste rock backfill for recycling gangue and controlling strata: creep experiments and models</title><author>Wu, Jiangyu ; Jing, Hongwen ; Meng, Qingbin ; Yin, Qian ; Yu, Liyuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c408t-f0a29f09005ad1503c1a235bca2445476f97186000b90b743f292c61b86c073a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Aggregates</topic><topic>algorithms</topic><topic>Aquatic Pollution</topic><topic>Aquifers</topic><topic>Atmospheric Protection/Air Quality Control/Air Pollution</topic><topic>Backfill</topic><topic>Cement</topic><topic>Cementing</topic><topic>Civil engineering</topic><topic>Confining</topic><topic>Creep (materials)</topic><topic>Design parameters</topic><topic>Dosage</topic><topic>Earth and Environmental Science</topic><topic>Ecotoxicology</topic><topic>Environment</topic><topic>Environmental 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international</jtitle><stitle>Environ Sci Pollut Res</stitle><addtitle>Environ Sci Pollut Res Int</addtitle><date>2021-07-01</date><risdate>2021</risdate><volume>28</volume><issue>27</issue><spage>35924</spage><epage>35940</epage><pages>35924-35940</pages><issn>0944-1344</issn><eissn>1614-7499</eissn><abstract>Filling mining with cemented waste rock backfill (CWRB) is an optimal approach to eliminate the gangue waste pollution. To efficiently evaluate the gangue recycling and its advantage in structure protection, the effects of the confining pressure, cement dosage, and aggregate particle size distribution (PSD) on the creep behavior of CWRB were investigated. Burgers creep model was used to characterize the visco-elastic characteristics of CWRB, a visco-elastic-plastic creep model was established to describe its creep behavior on this basis. A genetic algorithm (GA) for optimizing the model parameters was constructed to verify the creep model. The time-varying evolutions of strata movements were discussed to evaluate the effect of the creep behavior of CWRB on the structural safeties. The results show that the creep load levels and times are positively correlated with the confining pressure and cement dosage, indicating that the consideration of roof load without confining pressure of surrounding rock causes an increase in the design parameters of CWRB to waste the cementing material. The creep load levels and times firstly increase and then decrease with the Talbot gradation index, revealing that CWRB with superior aggregate PSD performs the strong anti-deformation capacity under creep condition. The confining pressure, cement dosage, and aggregate PSD are comprehensively considered to optimize CWRB, and its stability under creep condition causes the strata movement to gradually slow down, thereby protecting underground aquifers and surface buildings.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>33686603</pmid><doi>10.1007/s11356-021-12944-4</doi><tpages>17</tpages></addata></record> |
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| subjects | Aggregates algorithms Aquatic Pollution Aquifers Atmospheric Protection/Air Quality Control/Air Pollution Backfill Cement Cementing Civil engineering Confining Creep (materials) Design parameters Dosage Earth and Environmental Science Ecotoxicology Environment Environmental Chemistry Environmental Health Environmental science Evaluation Gangue Genetic algorithms Mathematical models Mining Optimization Particle size Particle size distribution pollution Pressure Pressure effects Recycling Research Article Rocks Size distribution Strata Sustainable development Viscoelasticity Waste Water Technology Water Management Water Pollution Control |
| title | Assessment of cemented waste rock backfill for recycling gangue and controlling strata: creep experiments and models |
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