Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading
Energy accumulation and dissipation play an important role during the entire process of rock failure. Some flaws, such as preexisting holes, will influence energy accumulation and dissipation. In order to investigate the energy evolution of coal specimen with preexisting holes under uniaxial compres...
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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/10.1155/2021/6639716 |
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| _version_ | 1832546854003277824 |
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| author | Xin Wei Hao Hu Yang Li |
| author_facet | Xin Wei Hao Hu Yang Li |
| author_sort | Xin Wei |
| collection | DOAJ |
| description | Energy accumulation and dissipation play an important role during the entire process of rock failure. Some flaws, such as preexisting holes, will influence energy accumulation and dissipation. In order to investigate the energy evolution of coal specimen with preexisting holes under uniaxial compression through numerical approaches, the particle simulation method was used in numerical simulations. In this paper, the energy evolution of coal specimen was theoretically analyzed, and the influence of different hole arrangement, such as diameter, spacing, angle, and number, on the evolution characteristics of energy was also discussed. At the same time, the arrangement of the artificial boreholes for preventing the rockburst was explored. The results show that, compared with the intact coal specimen, the change of diameter, spacing, angle, and the number of holes weakened the coal specimen’s capacity to store energy and release strain energy. When the diameter, the vertical distance, and relative angle of preexisting holes were 15 mm, 10∼15 mm, and 60°, respectively, the energy storage limit reached optimal value. For arrangement of the artificial boreholes, the diameter, spacing, and angle can be designed on the basis of those optimal values. This study has a guiding significance in designing the arrangement of the artificial boreholes for mitigation of rockburst. |
| format | Article |
| id | doaj-art-110bb35baad441c5a0e05a09fce0c6b3 |
| 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-110bb35baad441c5a0e05a09fce0c6b32025-02-03T06:46:43ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66397166639716Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial LoadingXin Wei0Hao Hu1Yang Li2Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Shandong, Jinan, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui, ChinaEngineering Laboratory of Deep Mine Rockburst Disaster Assessment, Shandong, Jinan, ChinaEnergy accumulation and dissipation play an important role during the entire process of rock failure. Some flaws, such as preexisting holes, will influence energy accumulation and dissipation. In order to investigate the energy evolution of coal specimen with preexisting holes under uniaxial compression through numerical approaches, the particle simulation method was used in numerical simulations. In this paper, the energy evolution of coal specimen was theoretically analyzed, and the influence of different hole arrangement, such as diameter, spacing, angle, and number, on the evolution characteristics of energy was also discussed. At the same time, the arrangement of the artificial boreholes for preventing the rockburst was explored. The results show that, compared with the intact coal specimen, the change of diameter, spacing, angle, and the number of holes weakened the coal specimen’s capacity to store energy and release strain energy. When the diameter, the vertical distance, and relative angle of preexisting holes were 15 mm, 10∼15 mm, and 60°, respectively, the energy storage limit reached optimal value. For arrangement of the artificial boreholes, the diameter, spacing, and angle can be designed on the basis of those optimal values. This study has a guiding significance in designing the arrangement of the artificial boreholes for mitigation of rockburst.http://dx.doi.org/10.1155/2021/6639716 |
| spellingShingle | Xin Wei Hao Hu Yang Li Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading Shock and Vibration |
| title | Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading |
| title_full | Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading |
| title_fullStr | Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading |
| title_full_unstemmed | Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading |
| title_short | Energy Accumulation and Dissipation of Coal with Preopening under Uniaxial Loading |
| title_sort | energy accumulation and dissipation of coal with preopening under uniaxial loading |
| url | http://dx.doi.org/10.1155/2021/6639716 |
| work_keys_str_mv | AT xinwei energyaccumulationanddissipationofcoalwithpreopeningunderuniaxialloading AT haohu energyaccumulationanddissipationofcoalwithpreopeningunderuniaxialloading AT yangli energyaccumulationanddissipationofcoalwithpreopeningunderuniaxialloading |