6Zhu Weishen, Li Shucai. Optimizing the construction sequence of a series of underground openings using dynamic construction mechanics and a rock mass fracture damage model[J]. Int. J. Rock Mech. Min.Sci., 2000, 37(4): 517-523.
7Gumusoglu M C, Bray J W, Watson J O. Analysis of underground excavations incorporating the strain softening of rock masses[A]. In:Cundal P ed. Proceedings of Rock Mechanics Symposium[C].London: Academic Press, 1986. 923 - 928.