崩塌地质灾害岩体结构与变形特征分析研究

针对发生崩塌灾害后岩体结构发生变化，导致周围路段地质灾害频发的问题，提出了崩塌地质灾害岩体结构与变形特征分析方法。介绍研究区域的基本情况，结合实际勘察结果，确定具有代表性的崩塌灾害后岩体为研究对象；通过扫描电子显微镜观察岩体微观结构，分析崩塌灾害下岩体结构，模拟岩体变形特征，实现崩塌地质灾害岩体结构与变形特征分析。研究结果显示，崩塌灾害发生后，该区域岩体存在大量裂缝，在岩体自重的作用下形成拉张折断破坏模式，并且因为岩体中紧密镶嵌角砾与胶结结构，导致晶体挤压错位明显；由于岩体受到崩塌灾害影响和长期处于蠕变状态，导致岩体上部弯曲变形，严重威胁周边公路与居民安全。

Study on structure and deformation characteristics of rock mass in collapse geological hazard

Aiming at the problem that the rock mass structure changes after the collapse disaster，which leads to frequent geological disasters in surrounding sections，a method for analyzing the rock mass structure and deformation characteristics of the collapse geological disaster is proposed.The basic situation of the study area is introduced，and the representative rock mass after collapse disaster is determined as the research object based on the actual investigation results.By observing the microstructure of rock mass by scanning electron microscope，the rock mass structure under collapse disaster is analyzed，and the deformation characteristics of rock mass are simulated to realize the analysis of rock mass structure and deformation characteristics under collapse geological disaster.The results show that there are a large number of fractures in the rock mass in this area after the collapse disaster，and the tensile fracture failure mode is formed under the action of the dead weight of the rock mass.Moreover，because of the tightly embedded breccia and cemented structure in the rock mass，the crystal extrusion dislocation is obvious.Because rock mass is affected by collapse disaster and in creep state for a long time，the upper part of rock mass is bent and deformed，which seriously threatens the safety of surrounding roads and residents.