The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor
An advanced break or a vast region of pressurisation may occur when the working face passes through an abandoned roadway, resulting in a roof falling or water inrush. The stress evolution of the working face passing through an abandoned roadway in a coal mine was comprehensively discussed using theo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/16/5824 |
| _version_ | 1827600235362254848 |
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| author | Song Shi Yichen Miao Haikuan Wu Zhipeng Xu Changwu Liu |
| author_facet | Song Shi Yichen Miao Haikuan Wu Zhipeng Xu Changwu Liu |
| author_sort | Song Shi |
| collection | DOAJ |
| description | An advanced break or a vast region of pressurisation may occur when the working face passes through an abandoned roadway, resulting in a roof falling or water inrush. The stress evolution of the working face passing through an abandoned roadway in a coal mine was comprehensively discussed using theoretical analysis, numerical simulation, and field monitoring. In this study, the calculated critical width of the abandoned roadway where the main roof was bound to an advanced break was 5.4 m. Reducing the suspended length of the main roof is beneficial to the stability of the working face’s passage across the abandoned roadway. The maximum abutment stress on the roof occurred at the working face through a semi-abandoned roadway, reaching 44.3 MPa. Subsequently, it decreased sharply until the working face completely passed and returned to the normal level. The damage depths of the floor strata from the field monitoring were 15 and 20 m, which showed that the use of hydraulic fracturing technology combined with floor grouting and hydraulic support for the abandoned roadway was proposed to stabilise the working face for safe mining. |
| first_indexed | 2024-03-09T04:31:07Z |
| format | Article |
| id | doaj.art-b325954570d444b7a2f5772ef128c4fe |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T04:31:07Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b325954570d444b7a2f5772ef128c4fe2023-12-03T13:35:14ZengMDPI AGEnergies1996-10732022-08-011516582410.3390/en15165824The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the FloorSong Shi0Yichen Miao1Haikuan Wu2Zhipeng Xu3Changwu Liu4College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaFaculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaSchool of Emergency Science, Xihua University, Chengdu 610039, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaCollege of Water Resource & Hydropower, Sichuan University, Chengdu 610065, ChinaAn advanced break or a vast region of pressurisation may occur when the working face passes through an abandoned roadway, resulting in a roof falling or water inrush. The stress evolution of the working face passing through an abandoned roadway in a coal mine was comprehensively discussed using theoretical analysis, numerical simulation, and field monitoring. In this study, the calculated critical width of the abandoned roadway where the main roof was bound to an advanced break was 5.4 m. Reducing the suspended length of the main roof is beneficial to the stability of the working face’s passage across the abandoned roadway. The maximum abutment stress on the roof occurred at the working face through a semi-abandoned roadway, reaching 44.3 MPa. Subsequently, it decreased sharply until the working face completely passed and returned to the normal level. The damage depths of the floor strata from the field monitoring were 15 and 20 m, which showed that the use of hydraulic fracturing technology combined with floor grouting and hydraulic support for the abandoned roadway was proposed to stabilise the working face for safe mining.https://www.mdpi.com/1996-1073/15/16/5824adjacent working faceabandoned roadwaystress evolutionnumerical simulationfield monitoring |
| spellingShingle | Song Shi Yichen Miao Haikuan Wu Zhipeng Xu Changwu Liu The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor Energies adjacent working face abandoned roadway stress evolution numerical simulation field monitoring |
| title | The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor |
| title_full | The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor |
| title_fullStr | The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor |
| title_full_unstemmed | The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor |
| title_short | The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor |
| title_sort | stress evolution of adjacent working faces passing through an abandoned roadway and the damage depth of the floor |
| topic | adjacent working face abandoned roadway stress evolution numerical simulation field monitoring |
| url | https://www.mdpi.com/1996-1073/15/16/5824 |
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