中文摘要：

建立含瓦斯煤的拉压动态损伤动态本构模型，将此模型嵌入LS-DYNA软件中，对含瓦斯煤体柱状装药欲裂爆破进行了模拟，数值模拟与模型实验基本一致。结果表明，煤体在爆炸荷载作用下，裂纹主要是由于压缩波和卸载波共同作用形成的，地应力对裂纹的发展具有抑制作用，主应力对于拉伸裂纹的发展具有明显的导向作用。

英文摘要：

In order to investigate on cracks propagation of the coal under column charge blasting subjected to geostatic stress,the damage constitutive model was established by considering tension and compression. The improved damage constitutive model was embedded in the FEM software to study the mechanics of cracks propagation coupled by blasting loads and geostatic stress. The precision of simulation is proved because the numerical results are in good with model experiments. The results show that the interaction of the compression wave and unloading wave yield cracks in the coal. The cracks are somewhat inhibited by geostatic stress. The direction of cracks is in accordance with the major principal stress.