Optimizing the construction sequence of a series of underground openings using dynamic construction mechanics and a rock mass fracture damage model

Abstract

A constitutive model for a rock mass with intermittent joints and with an evolution equation for the propagation of secondary cracks at joint tips is proposed in this paper using fracture mechanics and damage mechanics. The principle of dynamic construction mechanics of a rock mass is described. The principles of dynamic programming and artificial intelligence techniques, as well as the above mentioned mechanical models, are used to perform optimizing analysis for the construction scheme of a group of chambers for a large water-conservancy project. The results show that the optimizing analysis is effective.