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A method for analyzing surrounding rock unloading in tunnel blasting excavation based on complex variable theory
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DOI：10.1016/j.jrmge.2026.05.045.png)
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Abstract
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• A fast-convergent algorithm for triangular interpolation is proposed. • A formula for partial boundary pressure of tunnels is derived. • Rock column simplification is used to discuss surrounding rock unloading. • A dynamic-static combination method is used to analyze local overbreak unloading.
Keywords:
Surrounding rock unloading
Tunnel blasting
Conformal mapping
Complex variable theory
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