A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways
Mining pressure behavior in the process of longwall panel face passing through the parallel abandoned roadways (PARs) is different from the ordinary longwall panel face. It is easy to induce the accident of roof falling, coal wall spalling, and crush accident of shield. In order to reduce the occurr...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/9998561 |
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| author | Yang Li Yuqi Ren Nan Wang Junbo Luo Na Li Yikun Liu Guoshuai Li |
| author_facet | Yang Li Yuqi Ren Nan Wang Junbo Luo Na Li Yikun Liu Guoshuai Li |
| author_sort | Yang Li |
| collection | DOAJ |
| description | Mining pressure behavior in the process of longwall panel face passing through the parallel abandoned roadways (PARs) is different from the ordinary longwall panel face. It is easy to induce the accident of roof falling, coal wall spalling, and crush accident of shield. In order to reduce the occurrence of mine pressure accidents and ensure safe mining, a new mining method named “swing-inclined” mining method was proposed and was employed in the E13103 of Cuijiazhai coal mine. Based on the process of the longwall panel face passing through the PARs, a long-span and multisupport mass-structure model of the roof was established. The maximum support capacity of shield was calculated combined with stability relation between “roof-shield-PAR-‘similar pillar (SP)’-coal wall.” It provided the basis for determining the reasonable support capacity of shield. Moreover, the sensitivity analysis of influenced factors to the maximum support capacity of shield was carried out by using Matlab software. The sensitivity analysis results indicated that different factors had a different effect on the support capacity of shield. And, the process of passing through the PARs can be divided into 3 stages, depending on the relation between support capacity of shield and width of SP. In different stages, the change degree of support capacity of shield was different. The support capacity of shield is mainly influenced by the hanging distance of the main roof and the horizontal distance between the support point of the coal wall and the breaking position of the main roof. By on-site measurement, the sensitivity analysis results were verified. |
| format | Article |
| id | doaj-art-d8755a3271174fdd9ce8eb3981b973fc |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-d8755a3271174fdd9ce8eb3981b973fc2025-02-03T06:12:04ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/99985619998561A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned RoadwaysYang Li0Yuqi Ren1Nan Wang2Junbo Luo3Na Li4Yikun Liu5Guoshuai Li6School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaMining pressure behavior in the process of longwall panel face passing through the parallel abandoned roadways (PARs) is different from the ordinary longwall panel face. It is easy to induce the accident of roof falling, coal wall spalling, and crush accident of shield. In order to reduce the occurrence of mine pressure accidents and ensure safe mining, a new mining method named “swing-inclined” mining method was proposed and was employed in the E13103 of Cuijiazhai coal mine. Based on the process of the longwall panel face passing through the PARs, a long-span and multisupport mass-structure model of the roof was established. The maximum support capacity of shield was calculated combined with stability relation between “roof-shield-PAR-‘similar pillar (SP)’-coal wall.” It provided the basis for determining the reasonable support capacity of shield. Moreover, the sensitivity analysis of influenced factors to the maximum support capacity of shield was carried out by using Matlab software. The sensitivity analysis results indicated that different factors had a different effect on the support capacity of shield. And, the process of passing through the PARs can be divided into 3 stages, depending on the relation between support capacity of shield and width of SP. In different stages, the change degree of support capacity of shield was different. The support capacity of shield is mainly influenced by the hanging distance of the main roof and the horizontal distance between the support point of the coal wall and the breaking position of the main roof. By on-site measurement, the sensitivity analysis results were verified.http://dx.doi.org/10.1155/2021/9998561 |
| spellingShingle | Yang Li Yuqi Ren Nan Wang Junbo Luo Na Li Yikun Liu Guoshuai Li A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways Shock and Vibration |
| title | A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways |
| title_full | A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways |
| title_fullStr | A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways |
| title_full_unstemmed | A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways |
| title_short | A Novel Mining Method for Longwall Panel Face Passing through Parallel Abandoned Roadways |
| title_sort | novel mining method for longwall panel face passing through parallel abandoned roadways |
| url | http://dx.doi.org/10.1155/2021/9998561 |
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