Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar
The principal stress difference is introduced as a new evaluation index in order to better understand the failure mechanism of roadways affected by upper coal pillars and characterize failure of rock mass. Compared with traditional methods, it facilitates quantitative analysis. Moreover, we combine...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/8132817 |
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| _version_ | 1832560924084404224 |
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| author | Fulian He Zheng Zheng Hengzhong Zhu Bo Yang |
| author_facet | Fulian He Zheng Zheng Hengzhong Zhu Bo Yang |
| author_sort | Fulian He |
| collection | DOAJ |
| description | The principal stress difference is introduced as a new evaluation index in order to better understand the failure mechanism of roadways affected by upper coal pillars and characterize failure of rock mass. Compared with traditional methods, it facilitates quantitative analysis. Moreover, we combine the semiplane theory and we obtain the stress distribution on the coal pillar’s bedrock and the strengthening control area from the “change point” position along a 21 m horizontal line. The influence of multiple stresses induced from mining on a roadway is analyzed. It is found that rock failure is most likely while mining the 051606 working face, followed by mining the 051604 working face, and the stress influence on the upper pillar has the lowest failure probability. In addition, based on the asymmetry of the surrounding rock stress distribution, this study proposes strengthening control technology of surrounding rock on the basis of a highly stressed bolting support and anchor cable, adding to the steel ladder beam, steel mesh, and shed support’s protective function to the roadway’s roof and ribs. Finally, through field observations, it is concluded that the roadway deformation is within the controllable range. |
| format | Article |
| id | doaj-art-134d0fa24c09486c966e9938f4a013a2 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-134d0fa24c09486c966e9938f4a013a22025-02-03T01:26:21ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/81328178132817Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal PillarFulian He0Zheng Zheng1Hengzhong Zhu2Bo Yang3College of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaCollege of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaCollege of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaCollege of Resources & Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, ChinaThe principal stress difference is introduced as a new evaluation index in order to better understand the failure mechanism of roadways affected by upper coal pillars and characterize failure of rock mass. Compared with traditional methods, it facilitates quantitative analysis. Moreover, we combine the semiplane theory and we obtain the stress distribution on the coal pillar’s bedrock and the strengthening control area from the “change point” position along a 21 m horizontal line. The influence of multiple stresses induced from mining on a roadway is analyzed. It is found that rock failure is most likely while mining the 051606 working face, followed by mining the 051604 working face, and the stress influence on the upper pillar has the lowest failure probability. In addition, based on the asymmetry of the surrounding rock stress distribution, this study proposes strengthening control technology of surrounding rock on the basis of a highly stressed bolting support and anchor cable, adding to the steel ladder beam, steel mesh, and shed support’s protective function to the roadway’s roof and ribs. Finally, through field observations, it is concluded that the roadway deformation is within the controllable range.http://dx.doi.org/10.1155/2019/8132817 |
| spellingShingle | Fulian He Zheng Zheng Hengzhong Zhu Bo Yang Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar Advances in Civil Engineering |
| title | Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar |
| title_full | Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar |
| title_fullStr | Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar |
| title_full_unstemmed | Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar |
| title_short | Research on Failure Mechanism and Strengthening of Broken Roadway Affected by Upper Coal Pillar |
| title_sort | research on failure mechanism and strengthening of broken roadway affected by upper coal pillar |
| url | http://dx.doi.org/10.1155/2019/8132817 |
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