The computational model of a circular roadway considering the transient effect of excavation unloading is established for these problems.
While mesh optimization can reduce the number of elements and analysis effort, the previously published optimization method by the author only considered the effect of excavations at a region of interest.
Sliding micrometer, electrical resistivity tomography equipment and a borehole TV camera were employed to monitor the effects of the excavation.
Since the large-scale deep excavation studied in this paper is located in a complex geo-environment and high-density neighborhoods, the support system should be able to reduce the adverse effects of deep excavation to the minimum.
The spatial and time dependent effects of the excavation face and the effect of the geological conditions on the rock mass deformation and on the rockbolt stress were analyzed using the geotechnical monitoring data.
The inner damage zone is attributed to the effects of the excavation method and stress redistribution and the outer damage zone is attributed to the effects of stress redistribution alone.
The effects of blasting excavation, bolting and grouting in rock engineering were illustrated with various field observations or theoretical results, on which the degree of disturbances and the variations in elastic moduli and permeabilities were particularly focused.
