软硬互层状岩体局部区域的细观非均匀特性研究

doi:10.13722/j.cnki.jrme.2017.1165

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摘要

以锦屏工程地下厂房区典型软硬互层状岩体为研究对象，基于区域生长算法的图像分割技术表征岩体局部区域的细观结构特征，探讨获取区域生长算法中生长参数的方法；采用FLAC^3D差分程序，以比例关系映射方法建立与软硬互层状岩体岩样相对应的细观尺度均匀化网格模型。在此基础上，实现各组分基元力学参数满足Weibull分布的细观概率模型。并以程序内嵌的fish语言，实现考虑岩体局部细观结构及组分材料非均匀性时基元的弹–脆–塑性本构关系，建立互层状岩体局部区域细观数值模型，进而以多种数值模拟方案考察细观非均匀性对岩体力学行为的影响。结果表明，软硬互层状岩体的细观非均匀特性对其变形特性、强度特征、声发射规律及累计损伤过程影响显著。

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	李昂1
	邵国建2
	孙阳1
	师后盖2
	苏静波1

关键词 ：岩石力学, 软硬互层状岩体, 区域生长算法, 生长参数, 细观概率模型, 细观非均匀特性

Abstract：

For the alternatively distributed soft and hard rockmass of Jinping underground carves，the technology of image segmentation based on region growing algorithm is employed to characterize the meso-structure features of local areas of rock mass，and the method for obtaining growth parameter in algorithm is discussed. A meso-scale homogeneous mesh model corresponding to the rock sample is established by using the FLAC^3Dprogram according to the proportional relation mapping method. On this basis，the mesoscopic probability model and elastic-brittle-plastic constitutive relation is realized for mechanical parameters of elements. Then，a mesoscopic numerical model of local region of stratified rock mass is established. And several numerical simulation schemes are used to investigate the influence of meso-inhomogeneity on rock mechanical properties. The results show that the meso-inhomogeneity of alternatively distributed soft and hard rockmass has remarkable influence on their deformation property，strength characteristic，acoustic emission law and cumulative damage process.

Key words： rock mechanics alternatively distributed soft and hard rockmass region growing algorithm growth parameter meso-scopic probability model meso-inhomogeneity

引用本文:

李昂1，邵国建2，孙阳1，师后盖2，苏静波1. 软硬互层状岩体局部区域的细观非均匀特性研究[J]. 岩石力学与工程学报, 2017, 36(S2): 3852-3863.
LI Ang1，SHAO Guojian2，SUN Yang1，SHI Hougai2，SU Jingbo1. Study on meso-inhomogeneity of local region of alternatively distributed soft and hard composite rockmass. , 2017, 36(S2): 3852-3863.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2017.1165 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS2/3852

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