Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully
The paper presents an interpretation on the abnormal roof shock in longwall coal mining under gullies using physical modeling, numerical modeling, and mechanical analysis. The modeling results show that the roof movement causes the shock load onto the stope in longwall coal mining under surface gull...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/803071 |
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| _version_ | 1849400665925746688 |
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| author | Gangwei Fan Dongsheng Zhang Xufeng Wang |
| author_facet | Gangwei Fan Dongsheng Zhang Xufeng Wang |
| author_sort | Gangwei Fan |
| collection | DOAJ |
| description | The paper presents an interpretation on the abnormal roof shock in longwall coal mining under gullies using physical modeling, numerical modeling, and mechanical analysis. The modeling results show that the roof movement causes the shock load onto the stope in longwall coal mining under surface gully. The triggering mechanism of shock load depends on the direction of the face retreat with respect to the bottom of the surface gully. The slope tends to slide along the interface plane with a long periodical weighting intervals when mining towards the bottom of the gully (downslope direction), while the overburden strata may be split into blocks and tend to topple towards the free face of gully when mining away from the bottom of the gully (upslope direction). The mechanical models showed that, during the period of mining in downslope direction, planar sliding and key fragmental blocks cause a sudden roof shearing off which could result in shock load and, during the period of mining in upslope direction, the overburden blocks may become unstable due to shearing off which could resulted in large shock pressure onto the stope. |
| format | Article |
| id | doaj-art-82422f4daf4048c7b2dc4f9ac65afa0e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-82422f4daf4048c7b2dc4f9ac65afa0e2025-08-20T03:37:57ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/803071803071Mechanism of Roof Shock in Longwall Coal Mining under Surface GullyGangwei Fan0Dongsheng Zhang1Xufeng Wang2School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology, Xuzhou 221116, ChinaSchool of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology, Xuzhou 221116, ChinaSchool of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology, Xuzhou 221116, ChinaThe paper presents an interpretation on the abnormal roof shock in longwall coal mining under gullies using physical modeling, numerical modeling, and mechanical analysis. The modeling results show that the roof movement causes the shock load onto the stope in longwall coal mining under surface gully. The triggering mechanism of shock load depends on the direction of the face retreat with respect to the bottom of the surface gully. The slope tends to slide along the interface plane with a long periodical weighting intervals when mining towards the bottom of the gully (downslope direction), while the overburden strata may be split into blocks and tend to topple towards the free face of gully when mining away from the bottom of the gully (upslope direction). The mechanical models showed that, during the period of mining in downslope direction, planar sliding and key fragmental blocks cause a sudden roof shearing off which could result in shock load and, during the period of mining in upslope direction, the overburden blocks may become unstable due to shearing off which could resulted in large shock pressure onto the stope.http://dx.doi.org/10.1155/2015/803071 |
| spellingShingle | Gangwei Fan Dongsheng Zhang Xufeng Wang Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully Shock and Vibration |
| title | Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully |
| title_full | Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully |
| title_fullStr | Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully |
| title_full_unstemmed | Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully |
| title_short | Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully |
| title_sort | mechanism of roof shock in longwall coal mining under surface gully |
| url | http://dx.doi.org/10.1155/2015/803071 |
| work_keys_str_mv | AT gangweifan mechanismofroofshockinlongwallcoalminingundersurfacegully AT dongshengzhang mechanismofroofshockinlongwallcoalminingundersurfacegully AT xufengwang mechanismofroofshockinlongwallcoalminingundersurfacegully |