基于机器视觉的岩石隧道工作面破碎及滑移特性研究  

Study on fragmentation and slip characteristics of rock tunnel faces via machine vision

作　　者：米向东 沈一凡 陈佳耀 房倩[2] 高富强 Mi Xiangdong;Shen Yifan;Chen Jiayao;Fang Qian;Gao Fuqiang(a Zhuhai Shizimen Central Business District Construction Holdings Co.,Ltd.,b Zhuhai Urban Construction Group Co.,Ltd.,Zhuhai 519000;Tunnel and Underground Eng.Research Center of Ministry of Education,Beijing Jiaotong Univ.,Beijing 100044,China;Mining Research Institute,China Coal Technology&Engi-neering Group Corp.,Beijing 101300,China)

机构地区：[1]珠海十字门中央商务区建设控股有限公司,珠海城市建设集团有限公司,珠海519000 [2]北京交通大学城市地下工程教育部重点实验室,北京100044 [3]中煤科工开采研究院有限公司,北京101300

出　　处：《土木工程学报》2024年第S2期148-153,共6页China Civil Engineering Journal

基　　金：中央高校基本科研业务费专项资金(2023JBRC005);华东交通大学轨道交通基础设施性能监测与保障国家重点实验室开放基金(HJGZ2023101);国家自然科学基金资助项目(52308388)。

摘　　要：通过精细化表征分析裂隙迹线长度、倾角等参数,计算岩体开挖面破碎程度和潜在滑移区域来评估隧道开挖面结构特性。在岩体破碎程度评价方面,通过识别并统计裂隙迹线长度指标展开工作面岩体破碎评估。通过对比用于表征面积断裂强度的p21指标(单位面积断裂迹长)指标,讨论了岩体破碎程度评估的可靠性和合理性。在潜在滑移区域评价方面,提出了一种裂隙迹线近似提取方法。随后,基于裂隙倾角、长度的多因素指标进行评估。通过比较不同裂隙迹线提取方法,讨论了不同指标计算的情况下,各种裂隙提取方法表现的优劣势。研究发现,岩体破碎程度指标往往比p21指标更能详细准确的描述岩体裂隙密度的实际情况。同时,对岩体破碎程度和岩体工作面潜在滑移区域的评估可为精细化岩体结构特性提取,保障隧道安全建设提供重要参考。The structural characteristics of tunnel excavation faces were evaluated by calculating the degree of fragmentation and identifying potential slip zones of the rock mass through detailed analysis of fracture trace length,dip angle,and other parameters.The degree of rock mass fragmentation was assessed by identifying and statistically analyzing the fracture trace length.The reliability and rationality of this evaluation were discussed by comparing it with the p21 index(fracture trace length per unit area)which characterize area fracture intensity.For the evaluation of potential slip zones,an approximate method for extracting fracture traces was proposed.The assessment was subsequently conducted based on multi-factor indices of fracture dip angle and length.Additionally,the advantages and disadvantages of various fracture trace extraction methods were discussed by comparing different calculation indices.It was found that the rock mass fragmentation index often provides a more detailed and accurate description of the actual fracture density compared to the p21 index.Moreover,the evaluation of rock mass fragmentation and potential slip zones on the excavation face can provide critical references for the refined extraction of rock mass structural characteristics and ensure safe tunnel construction.

关 键 词：岩石隧道 机器视觉 裂隙迹线 破碎程度 潜在滑移区域 

分 类 号：U45[建筑科学—桥梁与隧道工程]