Longwall surface subsidence control by technology of isolated overburden grout injection
Surface subsidence is a typical ground movement due to longwall mining, which causes a series of environmental problems and hazards. In China, intensive coal extractions are commonly operated under dense-populated coalfields, which exacerbates the negative subsequences resulted from surface settleme...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-09-01
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| Series: | International Journal of Mining Science and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268617305773 |
| _version_ | 1818512813972258816 |
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| author | Dayang Xuan Jialin Xu |
| author_facet | Dayang Xuan Jialin Xu |
| author_sort | Dayang Xuan |
| collection | DOAJ |
| description | Surface subsidence is a typical ground movement due to longwall mining, which causes a series of environmental problems and hazards. In China, intensive coal extractions are commonly operated under dense-populated coalfields, which exacerbates the negative subsequences resulted from surface settlement. Therefore, effective approaches to control the ground subsidence are in urgent need for the Chinese coal mining industry. This paper presents a newly developed subsidence control technology: isolated overburden grout injection, including the theory, technique and applications. Relevant procedures such as injection system design, grouting material selection, borehole layout, grout take estimation and injection process design are proposed. The applicability of this technology has been demonstrated through physical modelling, field measurements, and case studies. Since 2009, the technology has been successfully applied to 14 longwall areas in 9 Chinese coal mines. The ultimate surface subsidence factors vary from 0.10 to 0.15. This method has a great potential to be popularized and performed where longwall mining are implemented under villages and ground infrastructures. Keywords: Longwall mining, Subsidence control, Isolated overburden grout injection, Green mining |
| first_indexed | 2024-12-10T23:52:20Z |
| format | Article |
| id | doaj.art-86cc59324b104f22b55d093562ae3979 |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-12-10T23:52:20Z |
| publishDate | 2017-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-86cc59324b104f22b55d093562ae39792022-12-22T01:28:43ZengElsevierInternational Journal of Mining Science and Technology2095-26862017-09-01275813818Longwall surface subsidence control by technology of isolated overburden grout injectionDayang Xuan0Jialin Xu1Corresponding author.; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, ChinaSurface subsidence is a typical ground movement due to longwall mining, which causes a series of environmental problems and hazards. In China, intensive coal extractions are commonly operated under dense-populated coalfields, which exacerbates the negative subsequences resulted from surface settlement. Therefore, effective approaches to control the ground subsidence are in urgent need for the Chinese coal mining industry. This paper presents a newly developed subsidence control technology: isolated overburden grout injection, including the theory, technique and applications. Relevant procedures such as injection system design, grouting material selection, borehole layout, grout take estimation and injection process design are proposed. The applicability of this technology has been demonstrated through physical modelling, field measurements, and case studies. Since 2009, the technology has been successfully applied to 14 longwall areas in 9 Chinese coal mines. The ultimate surface subsidence factors vary from 0.10 to 0.15. This method has a great potential to be popularized and performed where longwall mining are implemented under villages and ground infrastructures. Keywords: Longwall mining, Subsidence control, Isolated overburden grout injection, Green mininghttp://www.sciencedirect.com/science/article/pii/S2095268617305773 |
| spellingShingle | Dayang Xuan Jialin Xu Longwall surface subsidence control by technology of isolated overburden grout injection International Journal of Mining Science and Technology |
| title | Longwall surface subsidence control by technology of isolated overburden grout injection |
| title_full | Longwall surface subsidence control by technology of isolated overburden grout injection |
| title_fullStr | Longwall surface subsidence control by technology of isolated overburden grout injection |
| title_full_unstemmed | Longwall surface subsidence control by technology of isolated overburden grout injection |
| title_short | Longwall surface subsidence control by technology of isolated overburden grout injection |
| title_sort | longwall surface subsidence control by technology of isolated overburden grout injection |
| url | http://www.sciencedirect.com/science/article/pii/S2095268617305773 |
| work_keys_str_mv | AT dayangxuan longwallsurfacesubsidencecontrolbytechnologyofisolatedoverburdengroutinjection AT jialinxu longwallsurfacesubsidencecontrolbytechnologyofisolatedoverburdengroutinjection |