Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions
To study mechanical properties and progressive failure characteristics of strip coal pillar, a progressive failure monitoring device was developed. The uniaxial compression test of “roof-strip coal pillar-floor” structure specimens were conducted. As the strength of the roof and floor increases, the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523003273 |
| _version_ | 1797798911834849280 |
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| author | Xiao Qu Yu Chen Dawei Yin |
| author_facet | Xiao Qu Yu Chen Dawei Yin |
| author_sort | Xiao Qu |
| collection | DOAJ |
| description | To study mechanical properties and progressive failure characteristics of strip coal pillar, a progressive failure monitoring device was developed. The uniaxial compression test of “roof-strip coal pillar-floor” structure specimens were conducted. As the strength of the roof and floor increases, the strength of structural specimen increases. The damage of the strip coal pillar from middle to the coal-rock interface, and the lateral displacement of the upper part is larger than the lower part. Energy accumulation and release cause discontinuity damage in inhomogeneous coal bodies, the lateral displacement of the strip coal pillar shows step and mutation characteristics. Under hard surrounding rocks, the brittleness and impact characteristics of strip coal pillar are more obvious. The rapid increase of acoustic emission signal can be a failure precursory of strip coal pillar. The research has theoretical value and practical engineering significance to understanding the stability and failure mechanism for strip coal pillar. |
| first_indexed | 2024-03-13T04:12:00Z |
| format | Article |
| id | doaj.art-e3dbdfa4345b49d5957a5a321f5ff13c |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:00Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-e3dbdfa4345b49d5957a5a321f5ff13c2023-06-21T06:54:42ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02147Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditionsXiao Qu0Yu Chen1Dawei Yin2Research Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu 210098, China; State Key Laboratory of Mining Disaster Prevension and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, ChinaResearch Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu 210098, China; Corresponding author.State Key Laboratory of Mining Disaster Prevension and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, ChinaTo study mechanical properties and progressive failure characteristics of strip coal pillar, a progressive failure monitoring device was developed. The uniaxial compression test of “roof-strip coal pillar-floor” structure specimens were conducted. As the strength of the roof and floor increases, the strength of structural specimen increases. The damage of the strip coal pillar from middle to the coal-rock interface, and the lateral displacement of the upper part is larger than the lower part. Energy accumulation and release cause discontinuity damage in inhomogeneous coal bodies, the lateral displacement of the strip coal pillar shows step and mutation characteristics. Under hard surrounding rocks, the brittleness and impact characteristics of strip coal pillar are more obvious. The rapid increase of acoustic emission signal can be a failure precursory of strip coal pillar. The research has theoretical value and practical engineering significance to understanding the stability and failure mechanism for strip coal pillar.http://www.sciencedirect.com/science/article/pii/S2214509523003273Rock mechanics“Roof-strip coal pillar-floor” structureProgressive failure characteristicsAcoustic emissionStrip coal mining |
| spellingShingle | Xiao Qu Yu Chen Dawei Yin Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions Case Studies in Construction Materials Rock mechanics “Roof-strip coal pillar-floor” structure Progressive failure characteristics Acoustic emission Strip coal mining |
| title | Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| title_full | Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| title_fullStr | Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| title_full_unstemmed | Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| title_short | Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| title_sort | experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions |
| topic | Rock mechanics “Roof-strip coal pillar-floor” structure Progressive failure characteristics Acoustic emission Strip coal mining |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523003273 |
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