Investigation of Mechanical Properties for Group Anchors
Prestressed anchor support is one of the most important support methods for coal mine roadways. As the coal mining depth increases, the adaptability of existing prestressed anchor has become weaker and weaker, which is mainly reflected in the current anchor prestress is much smaller than the support...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/4/1521 |
| _version_ | 1797412851733757952 |
|---|---|
| author | Juncai Cao Nong Zhang Shanyong Wang Qun Wei |
| author_facet | Juncai Cao Nong Zhang Shanyong Wang Qun Wei |
| author_sort | Juncai Cao |
| collection | DOAJ |
| description | Prestressed anchor support is one of the most important support methods for coal mine roadways. As the coal mining depth increases, the adaptability of existing prestressed anchor has become weaker and weaker, which is mainly reflected in the current anchor prestress is much smaller than the support resistance required for the stability of the roadways and makes it difficult to effectively control the roadways. In order to solve the problem, a group anchor structure was proposed to realize higher prestressed anchor support technology and improve the support status of deep roadways. For coal mine roadways, group anchor structure is a new technology and new topic, and the design method and theoretical basis of the group anchor support are lacking. Therefore, the paper studied the bearing capacity of the group anchors through physical tests and numerical simulations. Among them, a special set of group anchor drawing tooling was designed and processed to match the physical test. The test results show that the group anchor structure can double the bearing capacity and bearing rigidity compared with traditional anchors, and the group anchor support can further optimize the support parameters to improve the bearing capacity of the surrounding rock. Therefore, the group anchor support is helpful to the stability control of the surrounding rock of the deep roadway. |
| first_indexed | 2024-03-09T05:08:14Z |
| format | Article |
| id | doaj.art-9043c57daf2b4f3aa1db20a2904d22fc |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:08:14Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9043c57daf2b4f3aa1db20a2904d22fc2023-12-03T12:52:18ZengMDPI AGApplied Sciences2076-34172021-02-01114152110.3390/app11041521Investigation of Mechanical Properties for Group AnchorsJuncai Cao0Nong Zhang1Shanyong Wang2Qun Wei3Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaPriority Research Centre for Geotechnical Science and Engineering, The University of Newcastle, Callaghan, NSW 2308, AustraliaSchool of Mechanical Engineering, Jiangsu University of Technology, 1801 Zhongwu Rd., Changzhou 213001, ChinaPrestressed anchor support is one of the most important support methods for coal mine roadways. As the coal mining depth increases, the adaptability of existing prestressed anchor has become weaker and weaker, which is mainly reflected in the current anchor prestress is much smaller than the support resistance required for the stability of the roadways and makes it difficult to effectively control the roadways. In order to solve the problem, a group anchor structure was proposed to realize higher prestressed anchor support technology and improve the support status of deep roadways. For coal mine roadways, group anchor structure is a new technology and new topic, and the design method and theoretical basis of the group anchor support are lacking. Therefore, the paper studied the bearing capacity of the group anchors through physical tests and numerical simulations. Among them, a special set of group anchor drawing tooling was designed and processed to match the physical test. The test results show that the group anchor structure can double the bearing capacity and bearing rigidity compared with traditional anchors, and the group anchor support can further optimize the support parameters to improve the bearing capacity of the surrounding rock. Therefore, the group anchor support is helpful to the stability control of the surrounding rock of the deep roadway.https://www.mdpi.com/2076-3417/11/4/1521failure processphysical model testgroup anchorsuper pre-stressrock mechanics |
| spellingShingle | Juncai Cao Nong Zhang Shanyong Wang Qun Wei Investigation of Mechanical Properties for Group Anchors Applied Sciences failure process physical model test group anchor super pre-stress rock mechanics |
| title | Investigation of Mechanical Properties for Group Anchors |
| title_full | Investigation of Mechanical Properties for Group Anchors |
| title_fullStr | Investigation of Mechanical Properties for Group Anchors |
| title_full_unstemmed | Investigation of Mechanical Properties for Group Anchors |
| title_short | Investigation of Mechanical Properties for Group Anchors |
| title_sort | investigation of mechanical properties for group anchors |
| topic | failure process physical model test group anchor super pre-stress rock mechanics |
| url | https://www.mdpi.com/2076-3417/11/4/1521 |
| work_keys_str_mv | AT juncaicao investigationofmechanicalpropertiesforgroupanchors AT nongzhang investigationofmechanicalpropertiesforgroupanchors AT shanyongwang investigationofmechanicalpropertiesforgroupanchors AT qunwei investigationofmechanicalpropertiesforgroupanchors |