隧道裂隙岩体结构信息解译与危石垮塌空间展布规律研究

doi:10.13722/j.cnki.jrme.2021.0471

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摘要裂隙岩体地下工程不同于有着比较明确数学模型的结构工程，作为一种非均质、非连续性介质，其最为凸显的特性即是岩体结构的不确定性，尤其是与开挖历程有密切关联的裂隙岩体隧道工程，所建数学模型分析结果均与工程实际出入较大。为此，充分考虑岩体裂隙的几何形态与展布特征，基于岩体智能分析多元解译系统实现岩体结构信息的自适应提取，耦合超前地质预报实现了断层影响区隧道裂隙网络模型多尺度精细构建；基于3DEC优化模型，开展隧道遭遇断层条件下其影响区内块体垮塌空间展布规律研究，对不同开挖循环内垮塌块体的形状、体积、数量等进行系统分析与数理统计；同时针对不同连通率、DFN密度与节理间距等敏感地质参数，通过108组仿真模拟，揭示不同岩体裂隙组合条件下隧道危石群的空间形态演化规律与响应特征。研究结果为裂隙岩体区域隧道及地下工程修建过程中危石垮塌灾害预测、临灾判识与防控治理提供了科学依据，具有重要理论意义和工程应用价值。

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	郑程程1
	贺鹏1
	王刚1
	孙尚渠1
	王洪波1
	徐锋2
	姜枫1

关键词 ：岩石力学, 裂隙岩体, 危石垮塌, 空间展布规律, 特征解译, 离散元法

Abstract：The actual underground engineering of fractured rock mass，which is different from the structural engineering with relatively clear mathematical models，shows obvious uncertainty of rock mass structure as a heterogeneous and discontinuous medium. Especially for the tunneling projects closely related to the fractured rock mass excavation process，the analysis results by the mathematical models are quite different from the actual ones. For this issue，taking the geometry and distribution characteristics of rock mass fractures into consideration，a rock mass intelligent analysis and multivariate interpretation system was adopted to realize the adaptive extraction of rock mass structure information and further，by coupled the advanced geological prediction technology，the multi-scale fine construction of the tunnel fracture network model in fault-affected areas was achieved. Based on the 3DEC optimization model，the spatial distribution law of block collapse in the fault-affected areas of tunnels was studied，and systematical analysis and mathematical statistics of the shape，volume and quantity of collapse blocks in different excavation cycles were carried out. According to the sensitive geological parameters such as connectivity rate，DFN density and joint spacing，the spatial shape evolution law and response characteristics of dangerous tunnel rock groups under different rock mass and fracture combinations were revealed with 108 groups of simulations. The results provide a scientific basis for the prediction，identification，prevention and control of dangerous rock collapse in the process of tunnel and underground engineering construction in fractured rock mass areas and hence，are of great theoretical significance and engineering application value.

Key words： rock mechanics fractured rock mass dangerous rock collapse spatial distribution law characteristics interpretation discrete element method(DEM)

引用本文:

郑程程1，贺鹏1，王刚1，孙尚渠1，王洪波1，徐锋2，姜枫1. 隧道裂隙岩体结构信息解译与危石垮塌空间展布规律研究[J]. 岩石力学与工程学报, 2022, 41(3): 515-532.
ZHENG Chengcheng1，HE Peng1，WANG Gang1，SUN Shangqu1，WANG Hongbo1，XU Feng2，JIANG Feng1. Structure information interpretation of fractured rock mass and spatial distribution law of dangerous rock collapse in tunnels. , 2022, 41(3): 515-532.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0471 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I3/515

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