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• W4386567636 abstract "Abstract Excavation damaged zone (EDZ) widely exists in the surrounding rock of underground roadway due to blasting excavation, which can further change the surrounding rock property and deteriorate the stability of the roadway. In the presented research, a damaged roadway model was developed to investigate the dynamic stress concentration factor (DSCF) distribution around the damaged roadway under a transient plane P wave. The influencing factors on DSCF distribution were discussed, including the shear modulus ( μ e / μ d ) of the intact surrounding rock to that of the damaged surrounding rock, the thickness of EDZ ( R d / R 0 ), and the wavelength of the incident stress wave. Results indicated that the damaged surrounding rock around the roadway belongs to stress‐relaxed zones, and the existence of EDZ can reduce the overall DSCF of surrounding rock. As the ratio of μ e / μ d is increasing, both the maximum compressive and tensile stress concentrations in the damaged zones decrease gradually, which is opposite to that in the intact surrounding rock. A larger EDZ can induce a higher DSCF in the damaged surrounding rock and a smaller DSCF in the intact surrounding rock. As the incident stress wave's wavelength is increasing, the peak value of DSCF grows first before declining, finally followed by a constant value. Furthermore, the maximum compressive and tensile stress concentrations are always found near the surrounding rock that is perpendicular to and along the incoming direction of stress waves, respectively. The stress concentration in both intact and damaged surrounding rock near the incoming side of stress waves is higher than that at the transmitted side." @default.
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• W4386567636 date "2023-09-09" @default.
• W4386567636 modified "2023-09-28" @default.
• W4386567636 title "Theoretical analysis of dynamic stress distribution around a circular damaged roadway under transient disturbance" @default.
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• W4386567636 doi "https://doi.org/10.1002/nag.3619" @default.
• W4386567636 hasPublicationYear "2023" @default.
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