Influence of weakly filled structural surface thickness on the dynamic mechanical behavior of rock mass
Through conducting SHPB impact tests and numerical simulations,this study investigates the damage characteristics and failure processes of rock masses with weakly filled structural surfaces under impact loading,as well as the influence of changes in structural surface thickness on the dynamic strength,stress wave propagation,and evolution of energy distribution in the rock mass.The results indicate that the dynamic strength of rock masses with filled structural surfaces decreases with an increase in structural surface thickness under impact loading.The thickness of weakly filled structural surfaces significantly affects the characteristics and processes of rock mass fail-ure,exhibiting different trends in four stages:pre-cracking,cracking,propagation,and perforation.Moreover,the damage characteristics of the filled structural surface and the rock mass show distinct variations.As the structur-al surface thickness increases,the reflection coefficient of stress waves in the rock mass first increases and then de-creases,the transmission coefficient decreases,and the energy carried by transmitted waves also decreases.
rock mass structural surfacestress wavefailure characteristicnumerical simulation
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