Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave
The mechanisms of dynamic disasters around underground roadways/tunnels were examined by adopting split Hopkinson pressure bar (SHPB) laboratory tests to reproduce the failure process of the surrounding rock subjected to incident stress waves. On the basis of ensuring the consistency of numerical si...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/20/10350 |
| _version_ | 1797475644036087808 |
|---|---|
| author | Zhi-Long He Cai-Ping Lu Xiu-Feng Zhang |
| author_facet | Zhi-Long He Cai-Ping Lu Xiu-Feng Zhang |
| author_sort | Zhi-Long He |
| collection | DOAJ |
| description | The mechanisms of dynamic disasters around underground roadways/tunnels were examined by adopting split Hopkinson pressure bar (SHPB) laboratory tests to reproduce the failure process of the surrounding rock subjected to incident stress waves. On the basis of ensuring the consistency of numerical simulations with the experimental results, the failure mechanisms of the surrounding rock and spatiotemporal evolution of the hoop stress around the hole were studied by using a two-dimensional particle flow code (PFC2D). The results of the numerical simulation indicate that tensile stress and compressive stress concentrate along the horizontal and vertical directions around the hole, respectively, owing to the instantaneous incidence of compressive stress waves. The failure modes of surrounding rocks are significantly different when the hole is subjected to various intensities of incident stress waves. In addition, the stability of the surrounding rock of the hole is greatly affected by the amplitude and wavelength of the incident wave and the elastic modulus of the surrounding rock. |
| first_indexed | 2024-03-09T20:47:59Z |
| format | Article |
| id | doaj.art-c25bef50a1d743669c341df1685b23f0 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:47:59Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-c25bef50a1d743669c341df1685b23f02023-11-23T22:43:14ZengMDPI AGApplied Sciences2076-34172022-10-0112201035010.3390/app122010350Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress WaveZhi-Long He0Cai-Ping Lu1Xiu-Feng Zhang2Key Laboratory of Deep Coal Resource Mining, Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Deep Coal Resource Mining, Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaCentre of Rockburst Prevention Research, Shandong Energy Group Co., Ltd., Jinan 250014, ChinaThe mechanisms of dynamic disasters around underground roadways/tunnels were examined by adopting split Hopkinson pressure bar (SHPB) laboratory tests to reproduce the failure process of the surrounding rock subjected to incident stress waves. On the basis of ensuring the consistency of numerical simulations with the experimental results, the failure mechanisms of the surrounding rock and spatiotemporal evolution of the hoop stress around the hole were studied by using a two-dimensional particle flow code (PFC2D). The results of the numerical simulation indicate that tensile stress and compressive stress concentrate along the horizontal and vertical directions around the hole, respectively, owing to the instantaneous incidence of compressive stress waves. The failure modes of surrounding rocks are significantly different when the hole is subjected to various intensities of incident stress waves. In addition, the stability of the surrounding rock of the hole is greatly affected by the amplitude and wavelength of the incident wave and the elastic modulus of the surrounding rock.https://www.mdpi.com/2076-3417/12/20/10350SHPBhoop stressdynamic stress concentration factortensile failure“X-shape” shear failure |
| spellingShingle | Zhi-Long He Cai-Ping Lu Xiu-Feng Zhang Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave Applied Sciences SHPB hoop stress dynamic stress concentration factor tensile failure “X-shape” shear failure |
| title | Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave |
| title_full | Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave |
| title_fullStr | Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave |
| title_full_unstemmed | Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave |
| title_short | Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave |
| title_sort | experimental and numerical investigations of dynamic failure mechanisms of underground roadway induced by incident stress wave |
| topic | SHPB hoop stress dynamic stress concentration factor tensile failure “X-shape” shear failure |
| url | https://www.mdpi.com/2076-3417/12/20/10350 |
| work_keys_str_mv | AT zhilonghe experimentalandnumericalinvestigationsofdynamicfailuremechanismsofundergroundroadwayinducedbyincidentstresswave AT caipinglu experimentalandnumericalinvestigationsofdynamicfailuremechanismsofundergroundroadwayinducedbyincidentstresswave AT xiufengzhang experimentalandnumericalinvestigationsofdynamicfailuremechanismsofundergroundroadwayinducedbyincidentstresswave |