Hongtao Wang1,2,*, Ping Liu1,2, Lige Wang3,4,*, Chi Liu5, Xin Zhang1,2, Luyao Liu1,2
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.1, pp. 375-391, 2020, DOI:10.32604/cmes.2020.08270
Abstract Layered rock strata are observed to be common during the excavation
of tunnels or cavities, and may significantly affect the deformation and failure
characteristics of surrounding rock masses due to various complex forms and
mechanical properties. In this paper, we propose a three-dimensional axisymmetric velocity field for roof collapse of shallow cavities in multi rock layers,
by considering the influences of roof cross-section shapes, supporting pressure,
ground overload, etc. The internal energy dissipation rate and work rates of external forces corresponding to the velocity field are computed by employing the
Hoek-Brown strength criterion and its associated flow rule. Further, the… More >
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