Analytical study of subcritical crack growth under mode I loading to estimate the roof durability in underground excavation

The long-term stability of the roof is particularly important in designing underground rock structures. To estimate the durability of roof strata in underground excavation, a computation scheme of subcritical crack growth is proposed in this study. By adopting the proposed method, the potential collapse location of strata is derivable in accordance with a static model, the durability of roof strata can be estimated, a dynamic time step control...