the following items are diseased evaluated and numerically related ;theory of blasting in soil and media .the classification and criteria of classification of soil and under dynamic loading
the characteristics and the affecting zones of stress wave propagation and their relationship with properties of soil and rock
and the failure zones resulted from contained blasting etc. Problems related to the effect of carity-ratio on stress –wave distribution characteristics along the charge axis under open-hole blasting and the major principal stress
positive –phase duration
wave length for open and clogged-hole blasting are preliminarily investigated.