Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving
The main roof directly affects the stress environment and the control effect of the surrounding rock of gob-side entry driving. A mechanical model of the surrounding rock of gob-side entry driving was established to analyze the influence mechanism of different main roof heights on the surrounding ro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2018-01-01
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| Series: | Tehnički Vjesnik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/293207 |
| _version_ | 1827282899322273792 |
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| author | Hai-qing Shuang Shu-gang Li Gao-feng Chen Peng Xiao Liang-chang Shen Ki-il Song |
| author_facet | Hai-qing Shuang Shu-gang Li Gao-feng Chen Peng Xiao Liang-chang Shen Ki-il Song |
| author_sort | Hai-qing Shuang |
| collection | DOAJ |
| description | The main roof directly affects the stress environment and the control effect of the surrounding rock of gob-side entry driving. A mechanical model of the surrounding rock of gob-side entry driving was established to analyze the influence mechanism of different main roof heights on the surrounding rock stability of the roadway under similar geological conditions. In addition, the influences of the main roof heights on the stress distribution of the surrounding rock were qualitatively analyzed. A quantitative analysis of the stress and deformation distribution characteristics of the surrounding rock were conducted by Universal Distinct Element Code (UDEC) when the heights were 0, 5, and 10 m based on the actual geological conditions. Results show that waste rocks in the caving zone and damaged immediate roof could provide four different stress combinations to key rock block, which is affected by the main roof height and other related parameters. With the increase in the main roof height, the hinged stress between the key rock blocks and the plastic damage area of the physical coal wall are reduced, the damage range of immediate roof gradually increases, and the vertical stress of narrow coal pillars first increases to 5.22 MPa and then remains at approximately 1.92 MPa. Therefore, the supporting strength of roof and the physical coal wall should be enhanced. Research results are successfully applied in the Yanjiahe Coal Mine. The conclusions provide significant theoretical guidance for controlling surrounding rock stability of the roadway under similar conditions. |
| first_indexed | 2024-04-24T09:26:50Z |
| format | Article |
| id | doaj.art-7f427acae9ec463086f6c5a7e2ac1f67 |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:26:50Z |
| publishDate | 2018-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-7f427acae9ec463086f6c5a7e2ac1f672024-04-15T14:44:05ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392018-01-0125249250110.17559/TV-20170904131528Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry DrivingHai-qing Shuang0Shu-gang Li1Gao-feng Chen2Peng Xiao3Liang-chang Shen4Ki-il Song5College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, P. R.China / Room 1501, College of Mechanical and Electrical Engineering, China University of Mining & Technology, No. 58 Yan Ta Road , Xi’an, 710054, ShaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, P. R.China / Room 1501, College of Mechanical and Electrical Engineering, China University of Mining & Technology, No.58 Yan Ta Road , Xi’an, 710054, ShaaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, P. R.China / Room 1501, College of Mechanical and Electrical Engineering, China University of Mining & Technology, No. 58 Yan Ta Road , Xi’an, 710054, ShaCollege of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, P. R.China / Room 1501, College of Mechanical and Electrical Engineering, China University of Mining & Technology, No. 58 Yan Ta Road , Xi’an, 710054, ShaCollege of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, P. R. China / Room 9605, College of Energy Engineering, China University of Mining & Technology, No. 58 Yan Ta Road , Xi’an, 710054, Shaanxi Province, P. R. ChinaDepartment of Civil Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon 402-751, Republic of KoreaThe main roof directly affects the stress environment and the control effect of the surrounding rock of gob-side entry driving. A mechanical model of the surrounding rock of gob-side entry driving was established to analyze the influence mechanism of different main roof heights on the surrounding rock stability of the roadway under similar geological conditions. In addition, the influences of the main roof heights on the stress distribution of the surrounding rock were qualitatively analyzed. A quantitative analysis of the stress and deformation distribution characteristics of the surrounding rock were conducted by Universal Distinct Element Code (UDEC) when the heights were 0, 5, and 10 m based on the actual geological conditions. Results show that waste rocks in the caving zone and damaged immediate roof could provide four different stress combinations to key rock block, which is affected by the main roof height and other related parameters. With the increase in the main roof height, the hinged stress between the key rock blocks and the plastic damage area of the physical coal wall are reduced, the damage range of immediate roof gradually increases, and the vertical stress of narrow coal pillars first increases to 5.22 MPa and then remains at approximately 1.92 MPa. Therefore, the supporting strength of roof and the physical coal wall should be enhanced. Research results are successfully applied in the Yanjiahe Coal Mine. The conclusions provide significant theoretical guidance for controlling surrounding rock stability of the roadway under similar conditions.https://hrcak.srce.hr/file/293207gob-side entry drivingmain roof heightnumerical simulationsurrounding rock stability |
| spellingShingle | Hai-qing Shuang Shu-gang Li Gao-feng Chen Peng Xiao Liang-chang Shen Ki-il Song Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving Tehnički Vjesnik gob-side entry driving main roof height numerical simulation surrounding rock stability |
| title | Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving |
| title_full | Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving |
| title_fullStr | Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving |
| title_full_unstemmed | Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving |
| title_short | Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving |
| title_sort | influence mechanism of main roof height on surrounding rock stability of gob side entry driving |
| topic | gob-side entry driving main roof height numerical simulation surrounding rock stability |
| url | https://hrcak.srce.hr/file/293207 |
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