Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst
Gob-side entry is an area where it is difficult to prevent and control the frequent occurrence of rock burst. Based on “Longwall Mining with Split-level Gateways” (LMSG), this paper puts forward the technology of preventing rock burst by a new gob-side entry (NCPG). The abutment pressure distributio...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8887165 |
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| author | Zhiqiang Wang Peng Wang Lei Shi Wenyu Lv Chao Wu Jianqiao Luo |
| author_facet | Zhiqiang Wang Peng Wang Lei Shi Wenyu Lv Chao Wu Jianqiao Luo |
| author_sort | Zhiqiang Wang |
| collection | DOAJ |
| description | Gob-side entry is an area where it is difficult to prevent and control the frequent occurrence of rock burst. Based on “Longwall Mining with Split-level Gateways” (LMSG), this paper puts forward the technology of preventing rock burst by a new gob-side entry (NCPG). The abutment pressure distribution of LMSG shows that the stress peak of solid coal is lower than the conventional panel, and the width of the limit equilibrium zone is also reduced by a small percentage. After the narrow coal pillar gob-side entry has been excavated, the peak stress in solid coal increases, and the width of the limit equilibrium zone decreases, so the practical stress concentration increases. However, the NCPG located in areas of lower stress. The peak stress in solid coal of the NCPG does not increase, but the width of the limit equilibrium zone increases, so the practical stress concentration decreases. NCPC makes the concentrated stress transfer into the deep coal body and plays the role of pressure avoidance. Compared with the narrow coal pillar gob-side entry, the NCPG reduces the energy stored in coal and rock masses and increases the energy consumption. It has significantly improved the regionality, initiative, safety, and timeliness of rock burst prevention in deep high-stress coal seam mining. |
| format | Article |
| id | doaj-art-08c73a4d33b14cfca56d53b490b84207 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-08c73a4d33b14cfca56d53b490b842072025-02-03T05:51:12ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88871658887165Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock BurstZhiqiang Wang0Peng Wang1Lei Shi2Wenyu Lv3Chao Wu4Jianqiao Luo5School 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, ChinaState Key Laboratory of Coal Resources in Western China, Xi’an University of Science and Technology, Xi’an 710054, 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, ChinaGob-side entry is an area where it is difficult to prevent and control the frequent occurrence of rock burst. Based on “Longwall Mining with Split-level Gateways” (LMSG), this paper puts forward the technology of preventing rock burst by a new gob-side entry (NCPG). The abutment pressure distribution of LMSG shows that the stress peak of solid coal is lower than the conventional panel, and the width of the limit equilibrium zone is also reduced by a small percentage. After the narrow coal pillar gob-side entry has been excavated, the peak stress in solid coal increases, and the width of the limit equilibrium zone decreases, so the practical stress concentration increases. However, the NCPG located in areas of lower stress. The peak stress in solid coal of the NCPG does not increase, but the width of the limit equilibrium zone increases, so the practical stress concentration decreases. NCPC makes the concentrated stress transfer into the deep coal body and plays the role of pressure avoidance. Compared with the narrow coal pillar gob-side entry, the NCPG reduces the energy stored in coal and rock masses and increases the energy consumption. It has significantly improved the regionality, initiative, safety, and timeliness of rock burst prevention in deep high-stress coal seam mining.http://dx.doi.org/10.1155/2020/8887165 |
| spellingShingle | Zhiqiang Wang Peng Wang Lei Shi Wenyu Lv Chao Wu Jianqiao Luo Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst Shock and Vibration |
| title | Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst |
| title_full | Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst |
| title_fullStr | Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst |
| title_full_unstemmed | Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst |
| title_short | Stress Analysis of Negative Coal Pillar Gob-Side Entry and Its Principle of Preventing Rock Burst |
| title_sort | stress analysis of negative coal pillar gob side entry and its principle of preventing rock burst |
| url | http://dx.doi.org/10.1155/2020/8887165 |
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