Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models
Destress drilling method is one of the commonly used methods for mitigating rock bursts, especially in coal mining. To better understand the influences of drilling arrangements on the destress effect is beneficial for rock burst mitigation. This study first introduced the rock burst mitigation mecha...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/3817397 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832553594666090496 |
|---|---|
| author | Tong-bin Zhao Wei-yao Guo Feng-hai Yu Yun-liang Tan Bin Huang Shan-chao Hu |
| author_facet | Tong-bin Zhao Wei-yao Guo Feng-hai Yu Yun-liang Tan Bin Huang Shan-chao Hu |
| author_sort | Tong-bin Zhao |
| collection | DOAJ |
| description | Destress drilling method is one of the commonly used methods for mitigating rock bursts, especially in coal mining. To better understand the influences of drilling arrangements on the destress effect is beneficial for rock burst mitigation. This study first introduced the rock burst mitigation mechanism of the destress drilling method and then numerically investigated the influences of drilling arrangements on the mechanical properties of coal models through uniaxial compression tests. Based on the test results, the energy evolution (i.e., the energy dissipation and bursting energy indexes) influenced by different drilling arrangements was analyzed. When the drilling diameter, the number of drilling holes in one row, or the number of drilling rows increases, the bearing capacity of specimens nonlinearly decreases, but the energy dissipation index increases. In addition, the drilling diameter or the number of drilling holes in one row affects the failure mode weakly, which is different from that of the number of drilling rows. Consequently, the bursting energy index decreases as increasing the drilling diameter or the number of drilling holes in one row, but as increasing the number of drilling rows, the variation law of bursting energy index is not obvious. At last, the influencing mechanism of drilling arrangement on the rock burst prevention mechanism of the destress drilling method was discussed and revealed. |
| format | Article |
| id | doaj-art-27519a346a35439b95fd2a85b3330578 |
| 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-27519a346a35439b95fd2a85b33305782025-02-03T05:53:36ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/38173973817397Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal ModelsTong-bin Zhao0Wei-yao Guo1Feng-hai Yu2Yun-liang Tan3Bin Huang4Shan-chao Hu5State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaDestress drilling method is one of the commonly used methods for mitigating rock bursts, especially in coal mining. To better understand the influences of drilling arrangements on the destress effect is beneficial for rock burst mitigation. This study first introduced the rock burst mitigation mechanism of the destress drilling method and then numerically investigated the influences of drilling arrangements on the mechanical properties of coal models through uniaxial compression tests. Based on the test results, the energy evolution (i.e., the energy dissipation and bursting energy indexes) influenced by different drilling arrangements was analyzed. When the drilling diameter, the number of drilling holes in one row, or the number of drilling rows increases, the bearing capacity of specimens nonlinearly decreases, but the energy dissipation index increases. In addition, the drilling diameter or the number of drilling holes in one row affects the failure mode weakly, which is different from that of the number of drilling rows. Consequently, the bursting energy index decreases as increasing the drilling diameter or the number of drilling holes in one row, but as increasing the number of drilling rows, the variation law of bursting energy index is not obvious. At last, the influencing mechanism of drilling arrangement on the rock burst prevention mechanism of the destress drilling method was discussed and revealed.http://dx.doi.org/10.1155/2018/3817397 |
| spellingShingle | Tong-bin Zhao Wei-yao Guo Feng-hai Yu Yun-liang Tan Bin Huang Shan-chao Hu Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models Advances in Civil Engineering |
| title | Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models |
| title_full | Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models |
| title_fullStr | Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models |
| title_full_unstemmed | Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models |
| title_short | Numerical Investigation of Influences of Drilling Arrangements on the Mechanical Behavior and Energy Evolution of Coal Models |
| title_sort | numerical investigation of influences of drilling arrangements on the mechanical behavior and energy evolution of coal models |
| url | http://dx.doi.org/10.1155/2018/3817397 |
| work_keys_str_mv | AT tongbinzhao numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels AT weiyaoguo numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels AT fenghaiyu numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels AT yunliangtan numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels AT binhuang numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels AT shanchaohu numericalinvestigationofinfluencesofdrillingarrangementsonthemechanicalbehaviorandenergyevolutionofcoalmodels |