Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress
In underground mining engineering, rocks around the entry are always subjected to large plastic deformation disasters, such as supporting body failure, roof rock collapse, and even rock burst under abutment stress and dynamic stress. To improve the stability of these rocks, the entry layout under ab...
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| Main Authors: | , , , , , , , |
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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/10.1155/2020/6655293 |
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| author | Wenlong Shen Guocang Shi Meng Wang Tenglong Rong Yungang Wang Ruifeng Zhang Xiangyu Wang Jianbiao Bai |
| author_facet | Wenlong Shen Guocang Shi Meng Wang Tenglong Rong Yungang Wang Ruifeng Zhang Xiangyu Wang Jianbiao Bai |
| author_sort | Wenlong Shen |
| collection | DOAJ |
| description | In underground mining engineering, rocks around the entry are always subjected to large plastic deformation disasters, such as supporting body failure, roof rock collapse, and even rock burst under abutment stress and dynamic stress. To improve the stability of these rocks, the entry layout under abutment stress and dynamic stress (ELAD) method was put forward to protect the entry from high abutment stress and dynamic stress. Dynamic disturbance intensity (DDI) was determined as the key evaluation index in ELAD, which was divided into “Slightly Disturbed Type,” “Moderately Disturbed Type,” and “Violent Impact Type” by the dynamic disturbance threshold (DDT) and dynamic large-deformation threshold (DLT). The established servo calculation algorithm was applied into a dynamic and static numerical analysis model with FLAC3D500 software for the solving of DDT and DLT by the method of zero growth DDI of plastic failure zone and the engineering-permitted limitation deformation. This model was validated by comparing the displacement of entry with the measured results in the field. The model results validated that the entry should keep away from the dynamic stress of Violent Impact Type firstly and then be arranged in the zone where the dynamic stress belongs to Slightly Disturbed Type. DDT increases linearly and DLT decreases with a power function as the increasing of the abutment stress. ELAD method is reliable to protect this kind of underground entry and its applicability will be improved by the support resistance by comparing the results from ELAD with those from the widely used methods for field investigation discussion. The analysis procedure can be repeatable and necessary since the rock and coal materials may be different in geological and engineering conditions. |
| format | Article |
| id | doaj-art-acd90732e8b74fb99bc8343db9531775 |
| 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-acd90732e8b74fb99bc8343db95317752025-08-20T03:38:59ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/66552936655293Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic StressWenlong Shen0Guocang Shi1Meng Wang2Tenglong Rong3Yungang Wang4Ruifeng Zhang5Xiangyu Wang6Jianbiao Bai7Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaHenan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaHenan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaHenan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaHenan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaHenan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources, School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaState Key Laboratory of Coal Resources and Safe Mining, Key Laboratory of Deep Coal Resource Mining Ministry of Education, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, Key Laboratory of Deep Coal Resource Mining Ministry of Education, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaIn underground mining engineering, rocks around the entry are always subjected to large plastic deformation disasters, such as supporting body failure, roof rock collapse, and even rock burst under abutment stress and dynamic stress. To improve the stability of these rocks, the entry layout under abutment stress and dynamic stress (ELAD) method was put forward to protect the entry from high abutment stress and dynamic stress. Dynamic disturbance intensity (DDI) was determined as the key evaluation index in ELAD, which was divided into “Slightly Disturbed Type,” “Moderately Disturbed Type,” and “Violent Impact Type” by the dynamic disturbance threshold (DDT) and dynamic large-deformation threshold (DLT). The established servo calculation algorithm was applied into a dynamic and static numerical analysis model with FLAC3D500 software for the solving of DDT and DLT by the method of zero growth DDI of plastic failure zone and the engineering-permitted limitation deformation. This model was validated by comparing the displacement of entry with the measured results in the field. The model results validated that the entry should keep away from the dynamic stress of Violent Impact Type firstly and then be arranged in the zone where the dynamic stress belongs to Slightly Disturbed Type. DDT increases linearly and DLT decreases with a power function as the increasing of the abutment stress. ELAD method is reliable to protect this kind of underground entry and its applicability will be improved by the support resistance by comparing the results from ELAD with those from the widely used methods for field investigation discussion. The analysis procedure can be repeatable and necessary since the rock and coal materials may be different in geological and engineering conditions.http://dx.doi.org/10.1155/2020/6655293 |
| spellingShingle | Wenlong Shen Guocang Shi Meng Wang Tenglong Rong Yungang Wang Ruifeng Zhang Xiangyu Wang Jianbiao Bai Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress Shock and Vibration |
| title | Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress |
| title_full | Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress |
| title_fullStr | Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress |
| title_full_unstemmed | Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress |
| title_short | Method of Entry Layout under Synergistic Effects of Abutment Stress and Dynamic Stress |
| title_sort | method of entry layout under synergistic effects of abutment stress and dynamic stress |
| url | http://dx.doi.org/10.1155/2020/6655293 |
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