Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine
In view of the influence of mining stress on the stability of the surrounding rock of inclined roof mining roadways in deep mines, the surrounding rock stability index is defined and solved based on the rock strength criterion and the stress distribution. The mining roadway of the 17102(3) working f...
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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/10.1155/2020/8855335 |
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| author | Jucai Chang Kai He Zhiqiang Yin Wanfeng Li Shihui Li Dongdong Pang |
| author_facet | Jucai Chang Kai He Zhiqiang Yin Wanfeng Li Shihui Li Dongdong Pang |
| author_sort | Jucai Chang |
| collection | DOAJ |
| description | In view of the influence of mining stress on the stability of the surrounding rock of inclined roof mining roadways in deep mines, the surrounding rock stability index is defined and solved based on the rock strength criterion and the stress distribution. The mining roadway of the 17102(3) working face of the Pansan Coal Mine is used as the engineering background and example. The surrounding rock’ stabilities under the conditions of no support and bolt support are analyzed according to the surrounding rock’s stability index and the deformation data. The results show that the areas of low wall and high wall instability are 1.68 m2 and 2.12 m2, respectively, and the low wall is more stable than the high wall; the areas of the roof and floor instability are 0.33 m2 and 0.35 m2, respectively, and the roof and floor are more stable than the two sides. During mining, the area of instability greatly increases at first, then decreases to 0, and reaches a maximum value at the peak of the abutment pressure. The stability of the surrounding rock decreases first and then increases. Compared with the end anchoring bolt support, the full-length anchoring bolt support reduces the area of instability to a greater extent, and the full-length anchoring bolt support effect is better. The surrounding rock in the end anchoring zone and the full-length anchoring zone began to deform significantly at 200 m and 150 m from the working face, respectively. This indicates that the control effect of the full-length anchoring bolt support is better and verifies the rationality of the surrounding rock stability index to describe the instability characteristics. This research method can provide a theoretical reference for analysis of the stability characteristics and support design of different cross-section roadways. |
| format | Article |
| id | doaj-art-67f1e3654ee147c7943d28577278a91c |
| 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-67f1e3654ee147c7943d28577278a91c2025-02-03T01:01:54ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88553358855335Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal MineJucai Chang0Kai He1Zhiqiang Yin2Wanfeng Li3Shihui Li4Dongdong Pang5Key Laboratory of Safe and Effective Coal Mining of the Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaKey Laboratory of Safe and Effective Coal Mining of the Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaKey Laboratory of Safe and Effective Coal Mining of the Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaHuainan Mining Industry (Group) Corporation Ltd., Huainan 232001, ChinaHuainan Mining Industry (Group) Corporation Ltd., Huainan 232001, ChinaKey Laboratory of Safe and Effective Coal Mining of the Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaIn view of the influence of mining stress on the stability of the surrounding rock of inclined roof mining roadways in deep mines, the surrounding rock stability index is defined and solved based on the rock strength criterion and the stress distribution. The mining roadway of the 17102(3) working face of the Pansan Coal Mine is used as the engineering background and example. The surrounding rock’ stabilities under the conditions of no support and bolt support are analyzed according to the surrounding rock’s stability index and the deformation data. The results show that the areas of low wall and high wall instability are 1.68 m2 and 2.12 m2, respectively, and the low wall is more stable than the high wall; the areas of the roof and floor instability are 0.33 m2 and 0.35 m2, respectively, and the roof and floor are more stable than the two sides. During mining, the area of instability greatly increases at first, then decreases to 0, and reaches a maximum value at the peak of the abutment pressure. The stability of the surrounding rock decreases first and then increases. Compared with the end anchoring bolt support, the full-length anchoring bolt support reduces the area of instability to a greater extent, and the full-length anchoring bolt support effect is better. The surrounding rock in the end anchoring zone and the full-length anchoring zone began to deform significantly at 200 m and 150 m from the working face, respectively. This indicates that the control effect of the full-length anchoring bolt support is better and verifies the rationality of the surrounding rock stability index to describe the instability characteristics. This research method can provide a theoretical reference for analysis of the stability characteristics and support design of different cross-section roadways.http://dx.doi.org/10.1155/2020/8855335 |
| spellingShingle | Jucai Chang Kai He Zhiqiang Yin Wanfeng Li Shihui Li Dongdong Pang Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine Advances in Civil Engineering |
| title | Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine |
| title_full | Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine |
| title_fullStr | Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine |
| title_full_unstemmed | Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine |
| title_short | Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine |
| title_sort | study on the instability characteristics and bolt support in deep mining roadways based on the surrounding rock stability index example of pansan coal mine |
| url | http://dx.doi.org/10.1155/2020/8855335 |
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