节理剪切扩容效应意指节理在剪切过程中，由于节理面的起伏不平引起节理体积和厚度增加的作用。
The Shear Dilatant Effect of Joints Refers to the Increase of Joints' Volume and Thickness Accompanying Shear Displacement as Caused by the Asperity of the Joint Surface.
在晚阶段剪切位移量增大，形成剪切扩容空间，主要形成了石英脉型金矿，同时对前阶段形成的糜棱岩型金矿有富集作用。
In the late stage, shear enlarged space is developed and quartz vein type gold deposits are formed, which make the former mylonite gold deposits enriched.
金矿床严格受剪切构造带的控制，金矿体一般赋存于韧—脆性构造和构造扩容带中。
The gold deposit is totally controlled by shear structures and is formed in the ductile brittle structures and structural extension zone.
扩容角越大，剪切带最终可以获得越来越高的剪切应变和体积应变。
Higher DA results in higher values of shear strain and volumetric strain in shear band.
考虑扩容效应后，剪切带的倾角和宽度均增加，剪应变率的局部化程度降低。
The inclination Angle of shear band and its width increase as dilatation Angle is increased. The extent of localized deformation decreases as dilatation effect is considered.
最后还对结构面在剪切条件下的扩容特性进行分析，并对现象做出解释。
The dilatancy characteristics of the discontinuities under shearing are analyzed; and an interpretation of the phenomenon is provided.
当扩容角较高时，应力峰值时试样内部的最大剪切应变增量较高，因而试样破坏的前兆比较明显。
Higher DA leads to higher value of maximum shear strain increment within the specimen. Therefore, more apparent precursor to failure can be observed at higher DA.
当扩容角较高时，应力峰值时试样内部的最大剪切应变增量较高，因而试样破坏的前兆比较明显。
Higher DA leads to higher value of maximum shear strain increment within the specimen. Therefore, more apparent precursor to failure can be observed at higher DA.
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