Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study
Practices show that hydraulic supports crushing accidents or roadway supports failure often take place when a longwall face advances toward an abandoned roadway or a predriven equipment recovery room. Therefore, a 2D similar simulation experiment is conducted to reveal the loading mechanism. The res...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/3810315 |
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| _version_ | 1832554861050200064 |
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| author | Chang Liu Zengqiang Yang Peilin Gong Kai Wang Xiaoqiang Zhang Junwen Zhang Yulin Li |
| author_facet | Chang Liu Zengqiang Yang Peilin Gong Kai Wang Xiaoqiang Zhang Junwen Zhang Yulin Li |
| author_sort | Chang Liu |
| collection | DOAJ |
| description | Practices show that hydraulic supports crushing accidents or roadway supports failure often take place when a longwall face advances toward an abandoned roadway or a predriven equipment recovery room. Therefore, a 2D similar simulation experiment is conducted to reveal the loading mechanism. The result shows that when the workface advances close to roadways, the main roof breaks ahead of the workface and leads to instability of higher strata. These two changes induce a sharp increase of the load on supports and lead to an accident. Thus, more attention should be paid to the advanced fracture. Therefore, mechanical analysis is used to explain the advanced fracture. Results show that the failure of coal pillar being excavated induces a sharp increase in the main roof’s hanging length. Once the hanging length reaches the limit, the advanced fracture takes place. Therefore, the stability of the coal pillar and the hanging length of roof strata are two key factors that may induce an accident. To prevent the a similar supports crushing accident, the partial backfilled technology which partly backfills the abandoned roadway in height and length to maintain the stability of the coal pillar is put forward and put into practice. The field test shows a good effect. |
| format | Article |
| id | doaj-art-c875e6dc0d0b432c94251493841ed321 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-c875e6dc0d0b432c94251493841ed3212025-02-03T05:50:24ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/38103153810315Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case StudyChang Liu0Zengqiang Yang1Peilin Gong2Kai Wang3Xiaoqiang Zhang4Junwen Zhang5Yulin Li6College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaCollege of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaCollege of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaInstitute of Mining Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150022, ChinaPractices show that hydraulic supports crushing accidents or roadway supports failure often take place when a longwall face advances toward an abandoned roadway or a predriven equipment recovery room. Therefore, a 2D similar simulation experiment is conducted to reveal the loading mechanism. The result shows that when the workface advances close to roadways, the main roof breaks ahead of the workface and leads to instability of higher strata. These two changes induce a sharp increase of the load on supports and lead to an accident. Thus, more attention should be paid to the advanced fracture. Therefore, mechanical analysis is used to explain the advanced fracture. Results show that the failure of coal pillar being excavated induces a sharp increase in the main roof’s hanging length. Once the hanging length reaches the limit, the advanced fracture takes place. Therefore, the stability of the coal pillar and the hanging length of roof strata are two key factors that may induce an accident. To prevent the a similar supports crushing accident, the partial backfilled technology which partly backfills the abandoned roadway in height and length to maintain the stability of the coal pillar is put forward and put into practice. The field test shows a good effect.http://dx.doi.org/10.1155/2018/3810315 |
| spellingShingle | Chang Liu Zengqiang Yang Peilin Gong Kai Wang Xiaoqiang Zhang Junwen Zhang Yulin Li Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study Advances in Civil Engineering |
| title | Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study |
| title_full | Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study |
| title_fullStr | Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study |
| title_full_unstemmed | Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study |
| title_short | Accident Analysis in Relation to Main Roof Structure When Longwall Face Advances toward a Roadway: A Case Study |
| title_sort | accident analysis in relation to main roof structure when longwall face advances toward a roadway a case study |
| url | http://dx.doi.org/10.1155/2018/3810315 |
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