Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study
Based on the occurrence conditions of a thick and hard main roof and wedge-structure immediate roof in the Zhuxianzhuang Coal Mine, the fracture characteristics and instability migration law of a thick and hard roof (THR) were examined via physical simulations. Mining zones were divided with respect...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5586310 |
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| author | Tong Zhao Peilin Gong Kaan Yetilmezsoy Majid Bahramian Changyou Liu Xiaofei Gong |
| author_facet | Tong Zhao Peilin Gong Kaan Yetilmezsoy Majid Bahramian Changyou Liu Xiaofei Gong |
| author_sort | Tong Zhao |
| collection | DOAJ |
| description | Based on the occurrence conditions of a thick and hard main roof and wedge-structure immediate roof in the Zhuxianzhuang Coal Mine, the fracture characteristics and instability migration law of a thick and hard roof (THR) were examined via physical simulations. Mining zones were divided with respect to the strata behaviors and roof control difficulty levels, and the principles and methods of zonal control under THR were put forward. This study proposed a coordinated control strategy of using confined blasting in water-filled deep holes, and reasonable support optimization, which could effectively reduce the roof fracture size, increases the supporting intensity and eliminate roof-control disasters. The length of confined blasting blocks and supporting intensity were calculated using a mechanical model for roof control in the strong strata behavior zone and less-strong strata behavior zone. These key parameters were determined as 20–25 m and 1.15–1.28 MPa, respectively, and the mining strategy was successfully applied in working face 880, performing high security and reasonable economical efficiency. |
| format | Article |
| id | doaj-art-155ae8ad90c440b5a7dc5e2411a7bf0d |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-155ae8ad90c440b5a7dc5e2411a7bf0d2025-02-03T01:27:07ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55863105586310Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case StudyTong Zhao0Peilin Gong1Kaan Yetilmezsoy2Majid Bahramian3Changyou Liu4Xiaofei Gong5Key Laboratory of In Situ Modified Mining Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaCollege of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaDepartment of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus, Esenler, Istanbul 34220, TurkeySchool of Chemical and Bioprocess Engineering, University College Dublin, Priesthouse, Dublin, IrelandState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaAerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaBased on the occurrence conditions of a thick and hard main roof and wedge-structure immediate roof in the Zhuxianzhuang Coal Mine, the fracture characteristics and instability migration law of a thick and hard roof (THR) were examined via physical simulations. Mining zones were divided with respect to the strata behaviors and roof control difficulty levels, and the principles and methods of zonal control under THR were put forward. This study proposed a coordinated control strategy of using confined blasting in water-filled deep holes, and reasonable support optimization, which could effectively reduce the roof fracture size, increases the supporting intensity and eliminate roof-control disasters. The length of confined blasting blocks and supporting intensity were calculated using a mechanical model for roof control in the strong strata behavior zone and less-strong strata behavior zone. These key parameters were determined as 20–25 m and 1.15–1.28 MPa, respectively, and the mining strategy was successfully applied in working face 880, performing high security and reasonable economical efficiency.http://dx.doi.org/10.1155/2021/5586310 |
| spellingShingle | Tong Zhao Peilin Gong Kaan Yetilmezsoy Majid Bahramian Changyou Liu Xiaofei Gong Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study Geofluids |
| title | Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study |
| title_full | Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study |
| title_fullStr | Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study |
| title_full_unstemmed | Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study |
| title_short | Mechanism of Support Optimization and Confined Blasting of Thick and Hard Rock with a Wedge-Structure Immediate Roof: A Case Study |
| title_sort | mechanism of support optimization and confined blasting of thick and hard rock with a wedge structure immediate roof a case study |
| url | http://dx.doi.org/10.1155/2021/5586310 |
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