Abstract
By setting different stemming in the coal and rock at the bottom of the borehole, the effects on the propagation of blasting stress waves were studied. The ANSYS-LS/DYNA with damage model was used to simulate the propagation of blasting cracks in the coal and rock. The results show that the speed of propagation is significantly accelerated when the stress wave entering the interior of the rock. Different stemming has few effects on the crushing of coal. When water is used as filler, the obstruction on the stress wave is slightly greater than that of the coal itself. When the soil is used as filler, it has the greatest hindrance to stress waves and the smallest fragmentation of rock mass.
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