Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion
The mechanics parameters of rock mass in Wulanmulun mine are determined on the basis of the experimental data measured in the laboratory and applied Hoek-Brown criterion in this paper.On this basis the failure characteristics of overlying strata caused by coal mining are studied through FLAC<sup&...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2019-10-01
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| Series: | 矿业科学学报 |
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| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/241 |
| _version_ | 1828187013686231040 |
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| author | Li Quansheng Xu Zhuhe Zhang Yong He Wenrui |
| author_facet | Li Quansheng Xu Zhuhe Zhang Yong He Wenrui |
| author_sort | Li Quansheng |
| collection | DOAJ |
| description | The mechanics parameters of rock mass in Wulanmulun mine are determined on the basis of the experimental data measured in the laboratory and applied Hoek-Brown criterion in this paper.On this basis the failure characteristics of overlying strata caused by coal mining are studied through FLAC<sup>3D</sup> simulation software.The research results show that:① The overlying strata under shallow burial depth until surface has been destroyed, and the skewness subsidence basin is formed on the surface.The maximum subsidence is 2.1m, and the subsidence rate is 0.6.② The stress-relaxed area and the stress-increased area are formed in a certain range of the surrounding boundary of the mining area.The state presents "external tight internal loosing".The degree of vertical stress concentration in front of coal wall is the highest, and the stress concentration factor is 2.2.There is a pressure arch separately above the coal wall and the open-off cut, but the span, the size of the arch foot and the degree of stress concentration are different.③The height of the caving zone is 18.9 m, and the height of water flowing fractured zone is 62.5 m of 12403 face in Wulanmulun coal mine. |
| first_indexed | 2024-04-12T07:28:38Z |
| format | Article |
| id | doaj.art-ec7ac4d2e4414f44a3fa664be1c33f49 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-12T07:28:38Z |
| publishDate | 2019-10-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-ec7ac4d2e4414f44a3fa664be1c33f492022-12-22T03:42:07ZengEmergency Management Press矿业科学学报2096-21932019-10-014541742410.19606/j.cnki.jmst.2019.05.00620190506Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterionLi Quansheng0Xu Zhuhe1Zhang Yong2He Wenrui3School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, ChinaThe mechanics parameters of rock mass in Wulanmulun mine are determined on the basis of the experimental data measured in the laboratory and applied Hoek-Brown criterion in this paper.On this basis the failure characteristics of overlying strata caused by coal mining are studied through FLAC<sup>3D</sup> simulation software.The research results show that:① The overlying strata under shallow burial depth until surface has been destroyed, and the skewness subsidence basin is formed on the surface.The maximum subsidence is 2.1m, and the subsidence rate is 0.6.② The stress-relaxed area and the stress-increased area are formed in a certain range of the surrounding boundary of the mining area.The state presents "external tight internal loosing".The degree of vertical stress concentration in front of coal wall is the highest, and the stress concentration factor is 2.2.There is a pressure arch separately above the coal wall and the open-off cut, but the span, the size of the arch foot and the degree of stress concentration are different.③The height of the caving zone is 18.9 m, and the height of water flowing fractured zone is 62.5 m of 12403 face in Wulanmulun coal mine.http://kykxxb.cumtb.edu.cn/article/id/241hoek-brown criterionmechanical parametersshallow buried depthnumerical simulationoverburden failure |
| spellingShingle | Li Quansheng Xu Zhuhe Zhang Yong He Wenrui Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion 矿业科学学报 hoek-brown criterion mechanical parameters shallow buried depth numerical simulation overburden failure |
| title | Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion |
| title_full | Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion |
| title_fullStr | Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion |
| title_full_unstemmed | Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion |
| title_short | Study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on Hoek-Brown criterion |
| title_sort | study on deformation and failure characteristics of overlying strata with thick loose layers and thin bedrock based on hoek brown criterion |
| topic | hoek-brown criterion mechanical parameters shallow buried depth numerical simulation overburden failure |
| url | http://kykxxb.cumtb.edu.cn/article/id/241 |
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