基于二维裂隙网络模拟的岩块搜索与岩层追踪方法

发布时间：2018-01-23 10:21

本文关键词： 裂隙网络蒙特卡洛模拟方法块体搜索逐层追踪　出处：《水利水运工程学报》2014年06期 　论文类型：期刊论文

【摘要】：脉动压力在岩石河床裂隙中的传播是导致大坝下游基岩冲刷破坏的主要原因之一。岩体裂隙网络作为水体的赋存空间,其结构特性决定了水流脉动压力波的传播规律。应用蒙特卡洛模拟方法,编译Fortran程序语言,模拟得出与天然岩体裂隙网络在统计上完全等效的、具有相似结构特性的仿真裂隙网络,实现管网线元和节点的自动编号存储。借助矩阵理论定义了衔接矩阵和回路矩阵,从数学意义上精确描述裂隙网络。提出了基岩冲刷破坏过程中,孤立岩块的自动搜索和逐层追踪的新方法。文中以10 m×10 m范围内的两组裂隙为例,依据裂隙网络的统计分布规律,通过蒙特卡洛模拟,给出由两组裂隙组成裂隙网络的模拟结构图以及块体逐层自动追踪的结果。研究结果为高坝下游基岩冲刷过程的模拟研究奠定基础。
[Abstract]:The propagation of fluctuating pressure in the rock bed fissure is one of the main reasons leading to the erosion failure of the bedrock downstream of the dam. The rock mass fracture network is used as the storage space of the water body. Monte Carlo simulation method is used to compile the Fortran program language, and the simulation results are statistically equivalent to the natural rock mass fracture network. The simulated fracture network with similar structural characteristics realizes the automatic numbering storage of the line elements and nodes of the pipe network, and defines the connection matrix and the loop matrix with the aid of matrix theory. In this paper, a new method for automatic searching and layer tracing of isolated rock blocks in the process of bedrock erosion and failure is proposed. Two groups of fractures in the range of 10 m 脳 10 m are taken as examples in this paper. According to the statistical distribution law of fracture network, Monte Carlo simulation is carried out. The simulation structure diagram of fracture network composed of two groups of fractures and the results of automatic tracing of block by layer are given. The results lay a foundation for the simulation study of the erosion process of bedrock in the lower reaches of high dam.
【作者单位】：中国石油大学(华东);
【基金】：中央高校基本科研业务费专项资金资助项目(12CX04024A,13CX02049A)
【分类号】：TU452
【正文快照】： 岩体裂隙中脉动压力的传播是导致高坝下游冲刷破坏的主要原因之一。自1973年的国际大坝会议以来,各国学者对脉动压力在缝隙中传播并导致水力冲刷破坏进行了大量的试验研究和数值模拟[1-7],但这些研究大都局限在简单一维线裂隙或者二维面裂隙内,并没有考虑实际岩体复杂的裂隙结

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