Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading
The occurrence of dynamic disasters is closely related to stress concentration in coal and rock, and coal resistivity varies significantly under different stress states. TTo analyze resistivity variations and damage of coal sample failure under loading, a resistivity loading testing system for coals...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Industry and Mine Automation
2025-02-01
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| Series: | Gong-kuang zidonghua |
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| Online Access: | http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671-251x.2024090052 |
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| author | SUN Kang LIU Qiang QIU Liming LI Zhenlei WANG Chaojie SUN Qian LIU Hairui WANG Litao |
| author_facet | SUN Kang LIU Qiang QIU Liming LI Zhenlei WANG Chaojie SUN Qian LIU Hairui WANG Litao |
| author_sort | SUN Kang |
| collection | DOAJ |
| description | The occurrence of dynamic disasters is closely related to stress concentration in coal and rock, and coal resistivity varies significantly under different stress states. TTo analyze resistivity variations and damage of coal sample failure under loading, a resistivity loading testing system for coals is developed. Correlation and damage analyses between resistivity and stress at different stages were conducted, leading to the following results: ① the relationship between coal resistivity and stress in coal and rock varied at different stages. Resistivity continuously decreased during the compression stage. The rate of resistivity variation slowed down during the elastic and plastic stages, and it increased sharply during the failure stage. ② The correlation between stress and resistivity exceeded 0.6 during the compression, elastic, and plastic stages, indicating strong correlations. However, during the failure stage, the correlation between stress and resistivity was less than 0.4. ③ The rate of resistivity variation during the entire loading process was divided into two phases: a steady phase with minimal fluctuations and an abrupt phase with a sharp increase in resistivity variation during the failure stage. ④ Before the plastic stage, resistivity was determined by the intrinsic conductivity of the coal matrix. During the plastic and failure stages, resistivity was influenced by pore expansion, permeability, and fracture damage. |
| format | Article |
| id | doaj-art-dc58b5cc83a94760a0f0098c6fd4e323 |
| institution | OA Journals |
| issn | 1671-251X |
| language | zho |
| publishDate | 2025-02-01 |
| publisher | Editorial Department of Industry and Mine Automation |
| record_format | Article |
| series | Gong-kuang zidonghua |
| spelling | doaj-art-dc58b5cc83a94760a0f0098c6fd4e3232025-08-20T02:19:19ZzhoEditorial Department of Industry and Mine AutomationGong-kuang zidonghua1671-251X2025-02-0151215516210.13272/j.issn.1671-251x.2024090052Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loadingSUN Kang0LIU Qiang1QIU Liming2LI Zhenlei3WANG Chaojie4SUN Qian5LIU Hairui6WANG Litao7Wanbei Coal-Electricity Group Co., Ltd., Suzhou 234000, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaCollege of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao 266580, ChinaGuizhou Xing'an Coal Industry Co., Ltd., Xingyi 561504, ChinaJuji Coal Mine, Henan Longyu Energy Co., Ltd., Yongcheng 476000, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThe occurrence of dynamic disasters is closely related to stress concentration in coal and rock, and coal resistivity varies significantly under different stress states. TTo analyze resistivity variations and damage of coal sample failure under loading, a resistivity loading testing system for coals is developed. Correlation and damage analyses between resistivity and stress at different stages were conducted, leading to the following results: ① the relationship between coal resistivity and stress in coal and rock varied at different stages. Resistivity continuously decreased during the compression stage. The rate of resistivity variation slowed down during the elastic and plastic stages, and it increased sharply during the failure stage. ② The correlation between stress and resistivity exceeded 0.6 during the compression, elastic, and plastic stages, indicating strong correlations. However, during the failure stage, the correlation between stress and resistivity was less than 0.4. ③ The rate of resistivity variation during the entire loading process was divided into two phases: a steady phase with minimal fluctuations and an abrupt phase with a sharp increase in resistivity variation during the failure stage. ④ Before the plastic stage, resistivity was determined by the intrinsic conductivity of the coal matrix. During the plastic and failure stages, resistivity was influenced by pore expansion, permeability, and fracture damage.http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671-251x.2024090052coal and rock dynamic disasterscoal failurecoal resistivitycoal and rock stresscorrelation analysisconductive channels |
| spellingShingle | SUN Kang LIU Qiang QIU Liming LI Zhenlei WANG Chaojie SUN Qian LIU Hairui WANG Litao Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading Gong-kuang zidonghua coal and rock dynamic disasters coal failure coal resistivity coal and rock stress correlation analysis conductive channels |
| title | Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading |
| title_full | Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading |
| title_fullStr | Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading |
| title_full_unstemmed | Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading |
| title_short | Study on resistivity-stress-damage coupling patterns and mechanisms in coal failure under loading |
| title_sort | study on resistivity stress damage coupling patterns and mechanisms in coal failure under loading |
| topic | coal and rock dynamic disasters coal failure coal resistivity coal and rock stress correlation analysis conductive channels |
| url | http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671-251x.2024090052 |
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