大数量非贯通节理岩体离散元数值模拟实现方法研究

发布时间：2018-06-20 13:06

本文选题：岩石力学 + 大数量非贯通节理　；参考：《岩石力学与工程学报》2017年S2期

【摘要】：为了研究大数量非贯通节理岩体的力学行为,以3DEC离散元软件为平台,提出适用于数值模拟的连通率定量计算的具体方法,其大小等于非贯通节理面积与切割贯通节理面积的比值。其中,非贯通节理面积可由三维岩体结构面网络模拟技术获取的薄圆盘直径,通过面积计算而得,而贯通节理面积与切割岩体形状密切相关,可分为规则岩体与非规则岩体两种情况。规则岩体由联立方程组进行求解,非规则岩体可根据本文提出的点数据搜索法进行获取。采用案例分析对计算结果进行对比验证,结果显示:所提方法能够实现大数量非贯通节理岩体力学行为的离散元数值模拟研究,采用的点数据搜索方法能够解决规则和非规则岩体切割截面面积求解难题,提高数值模拟效率,并且取得了较为可靠的模拟结果。
[Abstract]:In order to study the mechanical behavior of a large number of non-jointed rock masses, a concrete method for quantitative calculation of connectivity, which is suitable for numerical simulation, is proposed on the platform of 3DEC discrete element software. Its size is equal to the ratio of non-through joint area to cut through joint area. Among them, the diameter of the thin disc which can be obtained by the network simulation technique of three-dimensional rock mass structure plane can be obtained by the non-transfixion joint area, which is calculated by the area, and the through joint area is closely related to the shape of the cut rock mass. It can be divided into regular rock mass and irregular rock mass. The regular rock mass is solved by simultaneous equations, and the irregular rock mass can be obtained according to the point data search method proposed in this paper. A case study is used to compare and verify the calculated results. The results show that the proposed method can be used to simulate the mechanical behavior of a large number of non-connected jointed rock masses by discrete element method. The point data search method can solve the problem of the cross section area of regular and irregular rock mass cutting, and improve the efficiency of numerical simulation, and obtain more reliable simulation results.
【作者单位】：中国地质大学工程学院;江苏省地质调查研究院国土资源部地裂缝地质灾害重点实验室;中国地质大学教育部长江三峡库区地质灾害研究中心;
【基金】：江苏省地质调查研究院国土资源部地裂缝地质灾害重点实验室开放课题(201601) 国家自然科学基金资助项目(41602316) 中央高校基本科研业务费专项资金资助项目(201701)~~
【分类号】：TU45

【相似文献】