Interaction between stope support and ground motion in the hangingwall and footwall Project.

Abstract

This report describes the dynamic behavior of stope support. To predict deformation of the support under seismic load, a reasonable model of support was developed. It is assumed that the response of the stope support can be adequately simulated using a one degree-of-freedom system, SDOF. The SDOF model was developed for support under multiple excitations. The dynamic response of a support was solved using numerical methods. The proposed model was applied to the data, its advantages and limitations were verified by detailed testing with the strong ground motion data. The support response may be simulated using SDOF model when PGA is in the range 18 - 100 m/s2 ; for this data model shows that the maximal value of the stiffness is 120,000 kN/m and it is associated with a relatively small deformation of 1 mm measured at the center of support and the very large viscous damping attenuation. The ground motion caused elastic deformation; however, a small inelastic component of the motion could be introduced as well.