COMPARISON STUDY OF SAFETY FACTOR AND STRENGTH FACTOR IN NUMERICAL MODELING FOR TUNNEL STABILITY ANALYSIS BASED ON MOHR-COULOMB CRITERIA
One of the functions of a tunnel is to serve as the main access in underground mining activities, and the creation of an opening in the rock mass changes the local stress conditions. Therefore, it is necessary to calculate the magnitude and direction of stress after the opening to ensure the stab...
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| 主要作者: | |
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| 格式: | Final Project |
| 語言: | Indonesia |
| 在線閱讀: | https://digilib.itb.ac.id/gdl/view/85088 |
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| 機構: | Institut Teknologi Bandung |
| 語言: | Indonesia |
| 總結: | One of the functions of a tunnel is to serve as the main access in underground
mining activities, and the creation of an opening in the rock mass changes the local
stress conditions. Therefore, it is necessary to calculate the magnitude and direction
of stress after the opening to ensure the stability of the tunnel. This research
examines the difference between the SF and the FoS in the rock mass surrounding
the tunnel with varying ?h/?v (K) ratios. This study is important to determine
whether the SF can be used as FoS.
The analysis conducted revealed that the SF value approaches the FoS value for
each K ratio, except for K=1. This is because the general stress values (?1 and ?3)
principal stress at points far from the center of the tunnel will approach the in situ
stress values, resulting in a larger ratio used in the SF calculation. |
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