The compressibility and the theory of Mohr-Coulomb Intensity limit equilibrium of soil, provides the basis for the self-rescue principle of rodless drilling unit.
土体的可压缩性和土的摩尔·库伦强度极限平衡理论为无钻杆钻具自救机理提供了理论依据。
2
Under the assumption of equivalent strain principle, a damage constitutive model is established based on Mohr-Coulomb criterion.