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首页> 外文期刊>KSCE journal of civil engineering >Roadway Engineering Mechanical Properties and Roadway Structural Instability Mechanisms in Deep Wells
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Roadway Engineering Mechanical Properties and Roadway Structural Instability Mechanisms in Deep Wells

机译：深井巷道工程力学特性及巷道结构失稳机理

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摘要

We proposed a new classification method for stress-bearing structures in very-deep roadways. We conducted tests for roadwayengineering mechanical properties, including rock mechanical tests and ground stress measurement of two caverns in very-deep wells. We suggested a classification method for stress-bearing structures based on shear stress. Tests revealed that rock strength in the shear direction was the lowest; the stress distributions of acoustic emission and hollow inclusion were highly similar. Based on the roadway-engineering mechanical properties of two caverns and numerical simulation and in-situ tests, the key bearing structures were classified based on the concentrated shear stress. In deep caverns, shear stress was more concentrated on the softer surrounding rock, the key bearing structure areas, and the more seriously fractured surrounding rocks. Using the loose circle in-situ test, we compared the classification method of the key bearing structures with other classification methods. The results revealed agreement with the classification methods used for the key bearing structures. The deformation in-situ test showed that the strata convergence of concentrated shear stress areas developed quickly. Therefore, the phenomena of concentrated shear stress and the expanded range of key bearing structures are the structural instability mechanisms of deep roadways.
机译：我们提出了一种在深井巷道中承载结构的新分类方法。我们对道路工程机械性能进行了测试，包括岩石力学测试和非常深的井中两个洞穴的地面应力测量。我们提出了一种基于剪应力的承载结构分类方法。试验表明，剪切方向的岩石强度最低。声发射与中空夹杂物的应力分布高度相似。基于两个洞室的巷道工程力学性能，并通过数值模拟和现场试验，根据集中剪应力对关键支座结构进行了分类。在深层洞穴中，剪应力更多地集中在较软的围岩，关键的承压结构区域以及破裂程度更大的围岩上。使用松散圆原位测试，我们将关键轴承结构的分类方法与其他分类方法进行了比较。结果表明与用于关键轴承结构的分类方法一致。原位变形试验表明，集中剪切应力区域的地层收敛迅速。因此，集中剪应力现象和关键支护结构的扩展范围是深部巷道的结构失稳机理。

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