岩石模型结构面剪切全过程可视化试验技术研究

doi:10.13722/j.cnki.jrme.2021.1157

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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。

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	芦覃1
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	杜时贵3
	刘燕强1

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

Abstract：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 50 minutes 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.

Key words： rock mechanics rock joint semiconductor refrigerating digital image processing defogging algorithm

引用本文:

芦覃1，黄曼1，洪陈杰2，杜时贵3，刘燕强1. 岩石模型结构面剪切全过程可视化试验技术研究[J]. 岩石力学与工程学报, 2022, 41(S2): 3369-3379.
LU Tan1，HUANG Man1，HONG Chenjie2，DU Shigui3，LIU Yanqiang1. Experimental study on visualization test method of whole process shearing of model rock joints. , 2022, 41(S2): 3369-3379.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1157 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS2/3369

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