The surrounding rock is destroyed by repeated geological act, and the destroyed rock masses are disturbed or destroyed another time, the rule of destruction is different from that of complete material. The rule of destruction and deformation is controlled by the structure of rock mass, and the deformation and destruction of rock mass cannot be decided by the criteria of general materials. At present, the difficulty of the study of tunnel include five factors, first, the unclear model, second, the...
| 
点击下列相关研究机构和相关文献作者，可以直接查到这些机构和作者被《中国知识资源总库》收录的其它文献，使您全面了解该机构和该作者的研究动态和历史。
