基于数值模拟方法的深部岩体分区破裂化影响因素研究

Study on the influence factors of the deep rock mass zonal disintegration based on numerical simulation method

随着地下工程的发展,深部岩体的分区破裂化现象日益被各地的学者和专家重视.为了探讨分区破裂化现象在不同影响因素作用下在数值模拟软件实现中的差异效果,使用FLAC^(3D)数值模拟软件中的FISH语言开发程序,对岩石的分区破裂化现象进行数值模拟.得到的结果与现场模型试验有较好的一致性.并探讨了卸荷速率、剪胀角对于岩石分区破裂化现象的影响,卸荷速率越高,岩石的破坏区越趋向密集,破裂带数目也越多,而剪胀角变化对于岩石的破坏形态没有特别显著的影响.

With the development of underground engineering, more experts and scholars pay attention to the zonal disintegration phenomenon of deep rock. In order to study the effect of different factors, this paper makes use of the FLAC3D numerical simulation software devel-oped by the FISH language to analyze the generation and evolution of zonal disintegration. The results prove to be good in agreement with the model tests. And the effect of the unloa-ding rate and the angle of expansion working on the zonal disintegration is discussed. The re-lationship of unloading rate and the density of damage zone is direct ratio, but the dilatancy angle change has no obvious effect on the failure of rock.