摘要
把变形地质体作为弹塑性体,用增量理论计算变形地质体内应力和应变的分布是假想变位法的理论基础。用假想变位法模拟构造形成时变形地质体的物理边界条件,代替历来人为假设物理边界条件的方法,尽量减少人为因素,提高了模拟实验结果的可信性。 把这一方法应用到日本佐渡金矿控矿断裂形成机制的研究中,对控矿断裂成因的地质推断得到了理论验证。
It is the theoretical basis of virtual displacement method treating the deformed geological body as a elastic-plastic bady and calculating the distribution of strain and stress in the deformed geological body by increment theory. This will overcome the shortcoming that the stress distribution calculated by elastic theory can not authentica- lly reflect the stress state of the deformed geological body at that time.The author, replacing the geological inference alone by virtual displacement method, simulate and determine the physical boundary condition of a. deformed geological body. This reduces the artificial factor and increased the reliability of the test result.The method was used to study the ore-control structure of Sado gold rains, Japan and the geological inference on the mechanism of ore-control faults was veri-fed and the distribution law of ore-control faults obtained theoretical wcs proved by further geological investigation.
关键词
假想变位法
模拟
地质
构造
应力场
elastic-plastic body,increment theory, virtual displacement method, boundary condition, Sado gold mine
