Abstract: Based on the theory of discontinuous and self-stress rock mass as block-hierarchy structure in deep, the effect of viscoelasticity in block-rock partings to the propagation of pendulum waves is studied. Acceleration response of intermediate block-rock in the initial and the end regional and amplitude of positive and negative pendulum of each block-rock acceleration on five different kinds of viscoelasticities in partings are analyzed. It is shown that: it has no effect on acceleration attenuation cycle when viscous variation in block-rock partings. However, amplitude of positive and negative pendulum decrease more when viscous partings increases more than periodic increases. Attenuation cycles of acceleration are changed when partings elasticity variation, but amplitude of positive and negative pendulum of each block acceleration translation to equilibrium position when elasticity decreases. In the first half of the block-rock structure, the amplitude of positive and negative pendulum has a fluctuation when elasticity periodic decreases and the negative pendulum fluctuates significantly. Acceleration of each block attenuates rapidly when block-rock partings elasticity step increases; meanwhile, amplitude of positive and negative pendulum have a fluctuation in the initial regional.

Key words: block-rock mass, pendulum waves, viscoelasticity property, positive and negative pendulum