中文摘要：

基于LS-DYNA有限元分析软件,采用岩石HJC本构模型,对煤柱单轴压缩试验进行数值模拟。LS-DYNA模拟再现了煤柱动态损伤过程。结果表明,煤柱受动载荷越大,破坏越严重,煤柱从中部开始破裂,受载面一端破裂较严重;煤柱开始破裂时所受应力为0.1 MPa,破裂过程中所受应力为5 MPa。煤柱的总能量随所受动载荷的增加而增加,煤柱的总能量在冲击载荷瞬间达到最大值,破坏过程中总能量趋于稳定。煤柱四周越接近载荷面的地方其沿z轴方向应变变化越大;煤柱受动载荷越大,应变变化越大。

英文摘要：

Based on the LS-DYNA finite element analysis software, HJC constitutive model of rock was used to simulate the uniaxial compression experiment. The LS-DYNA simulation reproduced the dynamic damage process of coal pillar. The results showed that the greater the dynamic load of the coal pillar, the more serious the failure. Coal pillar began to rupture from the middle of the pillar, one end of the load surface had more serious rupture. The stress when the pillar began to rupture was 0.1 MPa, the suffered stress during the rupture was 5 MPa. The total energy of the coal pillar increased with the increase of load ap- plied. The total energy of the coal pillar reached the maximum value at the moment the impact loaded, and tended to be stable during the rupture process. The surrounding coal pillar was closer to the load surface, the greater the strain change in the z-axis directions the greater the load of the coal pillar and the strain change were.