Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation
Slip and instability of coal-rock parting-coal structure (CRCS) subjected to excavation disturbance can easily induce coal-rock dynamic phenomena in deep coal mines. In this paper, the failure characteristics and influencing factors of CRCS slip and instability were investigated by theoretical analy...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/1715644 |
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| author | Guang-Jian Liu Heng Zhang Ya-Wei Zhu Wen-Hao Cao Xian-Jun Ji Cai-Ping Lu Yang Liu |
| author_facet | Guang-Jian Liu Heng Zhang Ya-Wei Zhu Wen-Hao Cao Xian-Jun Ji Cai-Ping Lu Yang Liu |
| author_sort | Guang-Jian Liu |
| collection | DOAJ |
| description | Slip and instability of coal-rock parting-coal structure (CRCS) subjected to excavation disturbance can easily induce coal-rock dynamic phenomena in deep coal mines. In this paper, the failure characteristics and influencing factors of CRCS slip and instability were investigated by theoretical analysis, numerical simulations, and field observations. The following main results are addressed: (1) the slip and instability of CRCS induced by excavation are due to stress release, and the damage of the rock parting is partitioned into three parts: shear failure zone, slipping zone, and splitting failure zone from inside to outside with slip; (2) the slip and instability process of CRCS is accompanied by initiation, expansion, and intersection of shear and tensile cracks. The development of the cracks is dominated by shear behaviour, while the tensile crack is the main factor affecting fracture and instability of CRCS; and (3) slip and instability of CRCS are characterized by stick-slip first and then stable slip, accompanied with high P-wave velocity and rockburst danger coefficient based on microseismic tomography. |
| format | Article |
| id | doaj-art-f160204eda2c4d118fca1d9ce391d372 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-f160204eda2c4d118fca1d9ce391d3722025-02-03T06:12:06ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/17156441715644Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by ExcavationGuang-Jian Liu0Heng Zhang1Ya-Wei Zhu2Wen-Hao Cao3Xian-Jun Ji4Cai-Ping Lu5Yang Liu6Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312099, ChinaSchool of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004, ChinaSchool of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004, ChinaSchool of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004, ChinaSchool of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004, ChinaKey Laboratory of Deep Coal Resource Mining (Ministry of Education), School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (Ministry of Education), School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSlip and instability of coal-rock parting-coal structure (CRCS) subjected to excavation disturbance can easily induce coal-rock dynamic phenomena in deep coal mines. In this paper, the failure characteristics and influencing factors of CRCS slip and instability were investigated by theoretical analysis, numerical simulations, and field observations. The following main results are addressed: (1) the slip and instability of CRCS induced by excavation are due to stress release, and the damage of the rock parting is partitioned into three parts: shear failure zone, slipping zone, and splitting failure zone from inside to outside with slip; (2) the slip and instability process of CRCS is accompanied by initiation, expansion, and intersection of shear and tensile cracks. The development of the cracks is dominated by shear behaviour, while the tensile crack is the main factor affecting fracture and instability of CRCS; and (3) slip and instability of CRCS are characterized by stick-slip first and then stable slip, accompanied with high P-wave velocity and rockburst danger coefficient based on microseismic tomography.http://dx.doi.org/10.1155/2021/1715644 |
| spellingShingle | Guang-Jian Liu Heng Zhang Ya-Wei Zhu Wen-Hao Cao Xian-Jun Ji Cai-Ping Lu Yang Liu Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation Shock and Vibration |
| title | Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation |
| title_full | Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation |
| title_fullStr | Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation |
| title_full_unstemmed | Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation |
| title_short | Investigations of Coal-Rock Parting-Coal Structure (CRCS) Slip and Instability by Excavation |
| title_sort | investigations of coal rock parting coal structure crcs slip and instability by excavation |
| url | http://dx.doi.org/10.1155/2021/1715644 |
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