Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions
The cycle of the freeze-thaw action must be taken into account in the stability analysis of an open pit slope in the high-altitude and cold regions, because the natural process of freeze-thaw poses a significant effect on mechanical properties of the rock mass. To achieve this purpose, a linear rela...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/8409621 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832560882796724224 |
|---|---|
| author | Yong Hong Zhushan Shao Guangbin Shi Yong Dou Weiqin Wang Wen Zhang |
| author_facet | Yong Hong Zhushan Shao Guangbin Shi Yong Dou Weiqin Wang Wen Zhang |
| author_sort | Yong Hong |
| collection | DOAJ |
| description | The cycle of the freeze-thaw action must be taken into account in the stability analysis of an open pit slope in the high-altitude and cold regions, because the natural process of freeze-thaw poses a significant effect on mechanical properties of the rock mass. To achieve this purpose, a linear relationship between the geological strength index (GSI) and the Tianshan slope rock mass rating (TSMR) system is established considering the effect of the freeze-thaw action by introducing a freeze-thaw correction coefficient δ. The GSI value is modified for rock mass in high-altitude and cold regions. The improved Hoek-Brown criterion considers the influences of the freeze-thaw action and steep and gentle slopes. The research outcome is applied in the No. 4 minefield open pit coal mine in the Muli mining area. Numerical calculations are performed by inputting rock mass mechanical parameters obtained in traditional and modified criterions, to discuss the influences of the freeze-thaw action on the stabilities of both the present mining slope and the final slope at the end of the designed mining. The results show that the safety factors of the original slope are 2.33 and 1.67, respectively, while after the modification, they are 2.14 and 1.61, respectively. In terms of the No. 4 minefield open pit coal mine, the slope stability meets the design requirement, although taking the freeze-thaw cycle into account. |
| format | Article |
| id | doaj-art-89298bfe300041498166776bf167444c |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-89298bfe300041498166776bf167444c2025-02-03T01:26:26ZengWileyGeofluids1468-81232021-01-01202110.1155/2021/8409621Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold RegionsYong Hong0Zhushan Shao1Guangbin Shi2Yong Dou3Weiqin Wang4Wen Zhang5Xi’an University of Architecture and TechnologyXi’an University of Architecture and TechnologyXi’an University of Architecture and TechnologyChina Coal Xi’an Design Engineering Co.Xi’an University of Architecture and TechnologyXi’an University of Architecture and TechnologyThe cycle of the freeze-thaw action must be taken into account in the stability analysis of an open pit slope in the high-altitude and cold regions, because the natural process of freeze-thaw poses a significant effect on mechanical properties of the rock mass. To achieve this purpose, a linear relationship between the geological strength index (GSI) and the Tianshan slope rock mass rating (TSMR) system is established considering the effect of the freeze-thaw action by introducing a freeze-thaw correction coefficient δ. The GSI value is modified for rock mass in high-altitude and cold regions. The improved Hoek-Brown criterion considers the influences of the freeze-thaw action and steep and gentle slopes. The research outcome is applied in the No. 4 minefield open pit coal mine in the Muli mining area. Numerical calculations are performed by inputting rock mass mechanical parameters obtained in traditional and modified criterions, to discuss the influences of the freeze-thaw action on the stabilities of both the present mining slope and the final slope at the end of the designed mining. The results show that the safety factors of the original slope are 2.33 and 1.67, respectively, while after the modification, they are 2.14 and 1.61, respectively. In terms of the No. 4 minefield open pit coal mine, the slope stability meets the design requirement, although taking the freeze-thaw cycle into account.http://dx.doi.org/10.1155/2021/8409621 |
| spellingShingle | Yong Hong Zhushan Shao Guangbin Shi Yong Dou Weiqin Wang Wen Zhang Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions Geofluids |
| title | Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions |
| title_full | Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions |
| title_fullStr | Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions |
| title_full_unstemmed | Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions |
| title_short | Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions |
| title_sort | freeze thaw effects on stability of open pit slope in high altitude and cold regions |
| url | http://dx.doi.org/10.1155/2021/8409621 |
| work_keys_str_mv | AT yonghong freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions AT zhushanshao freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions AT guangbinshi freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions AT yongdou freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions AT weiqinwang freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions AT wenzhang freezethaweffectsonstabilityofopenpitslopeinhighaltitudeandcoldregions |