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- W4226410326 abstract "The depth of the excavation damage zone in the surrounding rock mass is an important parameter to determine the support design scheme, and is also of great reference significance to evaluate the stability of the surrounding rock. An acoustic test is the most commonly used method to obtain the depth of the excavation damage zone in surrounding rock. However, under high stress conditions, the surrounding rock is seriously broken and the internal structural planes are significantly developed, leading to the test error reaching meter-level. This paper, based on dimensional analysis, proposed the surrounding rock damage-fracture ratio R, which was defined as the depth of excavation damage zone to the depth of highly damaged zone, to characterize the relationship between the excavation damage zone and highly damaged zone. The established indicator considered the stress condition of the engineering zone, rock integrity, tunnel excavation span, and rock fracture zone depth and was verified with allowable error in engineering practice. The results show that the model can overcome the limitations of the acoustic wave testing method in surrounding rock testing of deep underground caverns, and the method of determining the depth of the surrounding rock damage zone based on the damage-fracture ratio R provides a practical and alternative method for determining the damage zone of surrounding rock excavation." @default.
- W4226410326 created "2022-05-05" @default.
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- W4226410326 date "2022-04-07" @default.
- W4226410326 modified "2023-09-30" @default.
- W4226410326 title "Determination Method of Excavation Damage Zone Based on Surrounding Rock Damage-Fracture Ratio in Underground Engineering" @default.
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- W4226410326 doi "https://doi.org/10.3389/feart.2022.836313" @default.
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