Based on the Mohr-Column rule, the formula for calculating rock resistant coefficient is given in the paper, and the formula can be applied in kinds of rock conditions.
基于莫尔—库仑屈服准则推导得出的围岩抗力系数计算公式，具有较强实用价值。
Elastic resistant coefficient, deformation and compressive moduli of surrounding rock in large-section loess tunnel are very important for design of tunnel.
对于高速铁路大断面黄土隧道严格的设计计算而言，黄土隧道围岩的弹性抗力系数、变形模量和压缩模量十分重要。
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