Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault
Fault activation triggers local deformation and dislocation, releasing a large amount of energy that can easily cause mining disasters, such as rock bursts and roadway instability. To study the changing characteristics of overburden structures and the evolution law of mining-induced stress as panel...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/7859148 |
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| author | Quansen Wu Peng Kong Quanlin Wu Xinggang Xu Xingyu Wu Tao Guo |
| author_facet | Quansen Wu Peng Kong Quanlin Wu Xinggang Xu Xingyu Wu Tao Guo |
| author_sort | Quansen Wu |
| collection | DOAJ |
| description | Fault activation triggers local deformation and dislocation, releasing a large amount of energy that can easily cause mining disasters, such as rock bursts and roadway instability. To study the changing characteristics of overburden structures and the evolution law of mining-induced stress as panel advances towards a fault from a footwall, two similar models were established, namely, a simulation experimental model and a numerical simulation model. In addition, the relationship among mining, mining stress, and rock bursts induced by fault activation was investigated. The results of this study reveal that when the working face is 30 m away from the fault, the high-position rock mass near the fault turns to the goaf where the fault is activated, and the two walls display relatively obvious dislocation. During the process of footwall panel mining to the fault, the abutment stress of the coal pillar tends to increase initially, followed by a decrease. When the working face is 20 m away from the fault, the abutment stress ahead of the working face reaches its maximum. When the width of the coal pillar is within the range of 10–40 m, the coal pillar accumulates a large amount of energy, and the working face affected by the fault easily induces a rock burst. Before fault activation, disturbances arising from the mining activities destroy the equilibrium stress environment of the rock system surrounding the fault, and the fault continuously accumulates energy. When the accumulated energy reaches a certain threshold, under the action of normal stress or shear stress, the fault will be activated, and a large amount of energy will be released, which can easily induce a rock burst. The research results in this paper provide a scientific basis for the classification, prediction, and prevention of rock bursts under similar geological conditions. |
| format | Article |
| id | doaj-art-6a19d46b842d476ab0b694e0fd4cb52f |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6a19d46b842d476ab0b694e0fd4cb52f2025-02-03T01:28:33ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/78591487859148Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal FaultQuansen Wu0Peng Kong1Quanlin Wu2Xinggang Xu3Xingyu Wu4Tao Guo5Jining University, Jining 273100, ChinaState Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaJining University, Jining 273100, ChinaState Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266590, ChinaFault activation triggers local deformation and dislocation, releasing a large amount of energy that can easily cause mining disasters, such as rock bursts and roadway instability. To study the changing characteristics of overburden structures and the evolution law of mining-induced stress as panel advances towards a fault from a footwall, two similar models were established, namely, a simulation experimental model and a numerical simulation model. In addition, the relationship among mining, mining stress, and rock bursts induced by fault activation was investigated. The results of this study reveal that when the working face is 30 m away from the fault, the high-position rock mass near the fault turns to the goaf where the fault is activated, and the two walls display relatively obvious dislocation. During the process of footwall panel mining to the fault, the abutment stress of the coal pillar tends to increase initially, followed by a decrease. When the working face is 20 m away from the fault, the abutment stress ahead of the working face reaches its maximum. When the width of the coal pillar is within the range of 10–40 m, the coal pillar accumulates a large amount of energy, and the working face affected by the fault easily induces a rock burst. Before fault activation, disturbances arising from the mining activities destroy the equilibrium stress environment of the rock system surrounding the fault, and the fault continuously accumulates energy. When the accumulated energy reaches a certain threshold, under the action of normal stress or shear stress, the fault will be activated, and a large amount of energy will be released, which can easily induce a rock burst. The research results in this paper provide a scientific basis for the classification, prediction, and prevention of rock bursts under similar geological conditions.http://dx.doi.org/10.1155/2020/7859148 |
| spellingShingle | Quansen Wu Peng Kong Quanlin Wu Xinggang Xu Xingyu Wu Tao Guo Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault Advances in Civil Engineering |
| title | Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault |
| title_full | Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault |
| title_fullStr | Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault |
| title_full_unstemmed | Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault |
| title_short | Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault |
| title_sort | study on overburden rock movement and stress distribution characteristics under the influence of a normal fault |
| url | http://dx.doi.org/10.1155/2020/7859148 |
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