LAPSE:2023.13002
Published Article
LAPSE:2023.13002
Physical Similarity Simulation of Deformation and Failure Characteristics of Coal-Rock Rise under the Influence of Repeated Mining in Close Distance Coal Seams
February 28, 2023
Abstract
Aiming at the problem that it is difficult to achieve accurate laying of model and precise excavation of roadways in special surrounding rock structure roadway according to conventional physical similarity simulation, which reduces the reliability of experimental results. An accurate laying of model and precise excavation of roadway method, named “labeling positioning and drawing line, presetting roadway model” (LPDLPRM), was proposed. The physical similarity simulation of deformation and failure characteristics of surrounding rock of coal-rock rise, under the influence of repeated mining in close distance coal seams, was carried out based on the method and infrared detection. The results show that the coal-rock rise in close distance coal seams was affected by repeated mining disturbances, and the surrounding rock of coal-rock rise was characterized by obvious asymmetric deformation, specific for the stress and strain near the coal pillar were higher than that of other parts, and cracks near the coal pillar were denser than other parts; when the coal seam is mined in which the coal-rock rise is located, the stress concentration of the surrounding rock near the rise was weakened by mining pressure relief in the upper coal seam; the stress concentration of the surrounding rock near the rise increases when the coal and the lower coal seam are mined, and the stress on the right side (coal pillar side) near the coal-rock rise was the most concentrated. Therefore, it is important to take measures to strengthen support near the coal pillar and to control asymmetric deformation when the coal-rock rise is influenced by repeated mining.
Aiming at the problem that it is difficult to achieve accurate laying of model and precise excavation of roadways in special surrounding rock structure roadway according to conventional physical similarity simulation, which reduces the reliability of experimental results. An accurate laying of model and precise excavation of roadway method, named “labeling positioning and drawing line, presetting roadway model” (LPDLPRM), was proposed. The physical similarity simulation of deformation and failure characteristics of surrounding rock of coal-rock rise, under the influence of repeated mining in close distance coal seams, was carried out based on the method and infrared detection. The results show that the coal-rock rise in close distance coal seams was affected by repeated mining disturbances, and the surrounding rock of coal-rock rise was characterized by obvious asymmetric deformation, specific for the stress and strain near the coal pillar were higher than that of other parts, and cracks near the coal pillar were denser than other parts; when the coal seam is mined in which the coal-rock rise is located, the stress concentration of the surrounding rock near the rise was weakened by mining pressure relief in the upper coal seam; the stress concentration of the surrounding rock near the rise increases when the coal and the lower coal seam are mined, and the stress on the right side (coal pillar side) near the coal-rock rise was the most concentrated. Therefore, it is important to take measures to strengthen support near the coal pillar and to control asymmetric deformation when the coal-rock rise is influenced by repeated mining.
Record ID
Keywords
coal-rock roadway, infrared thermal image, precise excavation of roadway, repeated mining, similar simulation test
Subject
Suggested Citation
Liu P, Gao L, Zhang P, Wu G, Wang Y, Liu P, Kang X, Ma Z, Kong D, Han S. Physical Similarity Simulation of Deformation and Failure Characteristics of Coal-Rock Rise under the Influence of Repeated Mining in Close Distance Coal Seams. (2023). LAPSE:2023.13002
Author Affiliations
Liu P: College of Mining, Guizhou University, Guiyang 550025, China
Gao L: College of Mining, Guizhou University, Guiyang 550025, China; Coal Mine Roadway Support and Disaster Prevention Engineering Research Center, Beijing 100083, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mine [ORCID]
Zhang P: College of Mining, Guizhou University, Guiyang 550025, China
Wu G: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Wang Y: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Liu P: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Kang X: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China [ORCID]
Ma Z: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China [ORCID]
Kong D: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Han S: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Gao L: College of Mining, Guizhou University, Guiyang 550025, China; Coal Mine Roadway Support and Disaster Prevention Engineering Research Center, Beijing 100083, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mine [ORCID]
Zhang P: College of Mining, Guizhou University, Guiyang 550025, China
Wu G: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Wang Y: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Liu P: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Kang X: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China [ORCID]
Ma Z: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China [ORCID]
Kong D: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Han S: College of Mining, Guizhou University, Guiyang 550025, China; National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
Journal Name
Energies
Volume
15
Issue
10
First Page
3503
Year
2022
Publication Date
2022-05-11
ISSN
1996-1073
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PII: en15103503, Publication Type: Journal Article
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LAPSE:2023.13002
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https://doi.org/10.3390/en15103503
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Feb 28, 2023
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