VISCO-ELASTICITY ANALYSIS IN CALCULATING THE BOUNDARY DISPLACEMENT FOR UNDERGROUND EXCAVATION

This paper first presents a solution of maximum displacement at the face of a level openingbased on the special problem solution of elasticity theory. Then, using Lapacian transformation, the visco-elasticity solution of the displacement is obtained as the rock material is treated to be Maxwell substance. From thevisco-elasticity solution the time effect of displacement caused by underground excavations is considered.