The change of blasting energy distribution because of different concentration coefficient of hole m was analyzed by numerical experiment.The experiment showed that the energy density distribution in the rock between two blasting holes and free face is concussive,the concussive pattern changes with the m value and the general trend is that the larger the m value is,the lower the concussive amplitude is,and the larger the unbroken rock between two blasting holes is.Besides,experiments show that the rock fragmentation between two blasting holes and free face are caused by reflective stress wave.