基于非连续变形分析的贵州典型崩塌研究

Research on the Typical Collapse of Guizhou Based on the Discontinues Deformation Analysis

非连续变形分析(DDA)方法考虑了岩体结构面对稳定的影响,融入了变形的不连续性和时间概念,更加符合崩塌体变形破坏的复杂过程。应用DDA对贵州山区典型的软硬岩互层构造+不合理采矿形成的崩塌进行了模拟,效果非常接近真实情况。结果表明,研究区崩塌体变形破坏演化过程分为山体下陷,拉裂缝扩展和失稳倾倒3个阶段,山体破坏形态与张拉裂缝相互影响,共同作用,是具有代表性的"拉裂-倾倒式"崩塌;根据模拟测点的数据,给出崩塌体变形破坏各阶段的变形量化参考值,可为该类崩塌体监测与预警指标体系研究提供重要参考依据。

The method of DDA considered the influence of stability from rock mass structure,involved the conception of discontinues of deformation and time,this are more conform to the complicated process of the deformation of collapse. The discontinuous deformation analysis program was applied to simulate the deformation process of collapse masses that formed by hard rock,high diffs terrain and mining,the results close to the reality circumstance.The failure deformation and the tension fissure influence each other and work together. This is the typical collapse masses of fracture-toppling type. This paper comes up with the displacement variation characteristics of collapse masses in each deformation stage based on the simulated data,provides important theoretical basis for the precaution monitoring of this collapse masses.