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| Stability analysis of slope dangerous rock mass in alpine region based on fracture mechanics |
| Received:May 07, 2022 Revised:June 06, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20220507004 |
| KeyWord:dangerous rock fracture mechanics main control structural plane frost heaving force temperature field |
| Author | Institution |
| 李祥庆 |
昆明理工大学 国土资源工程学院, 昆明 |
| 吴顺川 |
昆明理工大学 国土资源工程学院, 昆明 ;北京科技大学 土木与资源工程学院, 北京 |
| 刘兴雷 |
北京科技大学 土木与资源工程学院, 北京 |
| 张小强 |
昆明理工大学 国土资源工程学院, 昆明 |
| 张化进 |
昆明理工大学 国土资源工程学院, 昆明 |
| 韩龙强 |
昆明理工大学 国土资源工程学院, 昆明 |
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| Abstract: |
| In order to ensure the continuous production of open-pit mining enterprises,the stability analysis of dangerous rock mass in mine slope based on fracture mechanics is carried out.Taking an open-pit mine in an alpine area as the engineering background,in order to analyze the impact of the freeze-thaw cycle on the project,firstly,the temperature fields at different time points are established,and combined with the temperature field,a method is proposed to determine whether the freeze-thaw depth can affect the main control structural plane to produce frost heaving force.The maximum circumferential stress criterion is introduced to analyze the tensile cracks in the slope,and then the expression method of safety factor is derived.Taking the anti-inclined rock slope as the research subject,the dangerous rock mass of the slope is divided into n potentially unstable approximate rectangular rock masses.Based on this,a fracture mechanics slope stability calculation method considering the combined action of frost heaving force,fracture water pressure and gravity is established.According to the corresponding calculation example,the safety factor of each rock mass after segmentation is calculated by this method,and it is found that the frost heaving force has a certain impact on the stability of rock mass.Combined with the engineering practice,the feasibility of the proposed method is verified.Finally,combined with the relevant evaluation standards of dangerous rock stability,suitable treatment measures are provided for different rock mass stability. |
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