一种基于钻孔监测与宏细观耦合模拟的地下洞室围岩破裂分析方法

By using a method that combines borehole monitoring with macro- and micro-scale coupled simulation, a PFC3D-FLAC3D coupled model is constructed, which provides real-time feedback and correction parameters. This solves the problems of disconnect between monitoring and simulation and lack of micro-scale analysis in traditional methods, and enables high-precision prediction and risk warning of rock fracturing in deep underground engineering.

CN121457274BActive Publication Date: 2026-07-17INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Filing Date
2025-10-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional single-scale analysis methods are difficult to accurately predict the fracture development law of surrounding rock in deep underground engineering, leading to increased construction risks and engineering costs. Existing technologies cannot achieve dynamic interactive verification of monitoring and simulation and micro-scale analysis, and cannot meet the refined requirements of deep engineering for surrounding rock fracture analysis.

Method used

By using a method based on borehole monitoring and macro-micro coupled simulation, macro- and micro-mechanical parameters of the surrounding rock of underground caverns are collected, a PFC3D-FLAC3D coupled model is constructed, and the model parameters are corrected in real time by combining borehole television and ultrasonic testing, so as to achieve multi-scale and high-precision fracture prediction.

Benefits of technology

It enables full-scale analysis from microscopic mineral particle bonding failure to macroscopic rock mass fracture, improves the prediction accuracy of fracture depth and morphology, ensures that the prediction results are highly consistent with the actual situation on site, provides accurate basis for judging the timing of support and optimizing the scheme, and reduces the probability of engineering disasters.

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Abstract

本发明提供一种基于钻孔监测与宏细观耦合模拟的地下洞室围岩破裂分析方法，涉及地下工程围岩稳定性分析技术领域，S1、根据地下洞室围岩的现场岩样，采集地下洞室围岩的宏细观力学参数，形成可用于数值模拟的输入参数集；S2、根据输入参数集构建宏观与细观耦合模拟模型，模拟围岩应力分布并划分破裂风险区域，输出包含高风险区分布和最大主应力方向的模拟破裂特征数据；S3、根据高风险区分布最大主应力方向，布置钻孔并执行现场监测，获取围岩实际破裂特征数据。能够通过宏细观跨尺度耦合模拟与现场钻孔监测动态融合，实现深埋地下洞室开挖扰动下围岩破裂演化多尺度、高精度预测。
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Citation Information

Patent Citations

  • High-precision prediction method for fracture degree of surrounding rock of deep tunnel

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