文献类型：期刊文献

中文题名：岩石模型结构面剪切全过程可视化试验技术研究

英文题名：Experimental study on visualization test method of whole process shearing of model rock joints

作者：芦覃[1];黄曼[1];洪陈杰[2];杜时贵[3];刘燕强[1]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]中国矿业大学(北京)力学与建筑工程学院,北京100083;[3]宁波大学土木与环境工程学院,浙江宁波315000

年份：2022

卷号：41

期号：S02

起止页码：3369

中文期刊名：岩石力学与工程学报

外文期刊名：Chinese Journal of Rock Mechanics and Engineering

收录：CSTPCD、、CSCD2021_2022、Scopus、北大核心、CSCD、北大核心2020

基金：国家自然科学基金资助项目(41427802);浙江省自然科学基金资助项目(LY18D020003)

语种：中文

中文关键词：岩石力学;岩石结构面;半导体制冷;数字图像处理;去雾算法

外文关键词：rock mechanics;rock joint;semiconductor refrigerating;digital image processing;defogging algorithm

中文摘要：开展剪切全过程可视化试验对于研究岩石结构面渐进破坏特性具有重要的意义。结合三维激光扫描与3D打印技术,利用透明光敏树脂材料制作了表面形貌相似度高的岩石结构面透明模型,低温下的模型试样力学性能测试表明:该材料在-30℃~-45℃温度下单轴抗压强度特性与岩石材料相近;在直剪试验设备上加装半导体制冷装置,不同工况下的制冷性能试验表明:半导体制冷设备在工作50 min后,其制冷性能受强制对流的影响逐渐降低,腔体内部温度维持在-17℃左右;结合暗通道先验去雾算法与可视化图像追踪方法,可较清晰地获取结构面剪切全过程表面形貌,有效解决了低温试验条件试样起雾的问题;通过剪切试验表明:低温条件下试验全过程中试样的温度始终低于-30℃,符合光敏树脂材料作为类岩石特性的温度要求,也进一步验证了试验装备和试验技术的可行性,为岩石模型结构面剪切全过程可视化试验研究创造了条件。

外文摘要：Visualization test of whole shear process is of great significance to study progressive failure characteristics of rock joints.The study combines three-dimensional laser scanning,printing technology with transparent photosensitive resin material(veroclear)to produce high-precision transparent models of rock joints.Carry out uniaxial compression experiments at different temperatures,the experimental results show that the performance of this material is similar to that of rock material at-30℃--45℃.Local modification of shearing equipment based on semiconductor refrigeration technology,The refrigeration performance tests under different working conditions show that after 50minutes of operation,the cooling performance of semiconductor refrigeration equipment is gradually reduced by forced convection,and the temperature inside the cavity is maintained at about-17℃.Combined with the dark channel prior defogging algorithm and the visual monitoring method,the surface morphology of the whole shear process of the rock joints surface can be obtained more clearly,which effectively solves the problem of specimen fogging low temperature test conditions.The shear test shows that the temperature of the sample is always lower than-30℃in the whole process of the test at low temperature,which meets the temperature requirements of photosensitive resin material as rock-like characteristics.The feasibility of the test equipment and test technology is further verified,which creates conditions for a visual test method for the whole shear process of rock joints.