根据安泰煤矿三采区坚硬煤体的动态力学特性及相关爆破参数,利用LS-DYNA有限元程序模拟了单孔柱状装药爆破过程,分析了爆破应力波对煤体力学性质的影响及爆破裂纹的扩展过程,得到了坚硬煤体粉碎区和裂隙区的范围及形成时间。研究结果表明,坚硬煤体爆破粉碎区半径为装药半径的3.8倍,裂隙区半径为装药半径的51倍。 According to the dynamic mechanical properties and the relevant blasting parameters of the hard coal in the No.3 mining area of ​​Antai Coal Mine, the single-hole cylindrical charge blasting process was simulated by LS-DYNA finite element program. The influence of blasting stress wave on the mechanical properties of coal and the explosion crack Of the expansion process, got the hard coal crushing zone and fracture zone of the scope and formation time. The results show that the radius of hard coal blasting crushing zone is 3.8 times the radius of charge and the radius of fracture zone is 51 times of the radius of charge.