Experimental Study on Shear mechanism of Rock Discontinuities

岩石结构面剪切机理试验研究

• 批准号: 02452227
• 负责人: TERADA Makoto
• 金额: $ 2.05万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452227/
• 关键词: Rock discontinuities; Shear strength; Discontinuous rock; Roughness of surface

Main results obtained in this project are following.1. It is observed that the surface roughness of discontinuities in the higher frequency region, than the defined one depend on the normal stress, are fractured, after the shear test of rock discontinuities under the condition of the constant normal stress.2. Progressing the shear displacement, the fracture of the surface roughness of rock discontinuities occurs in the high frequency components, and develops to the lower components. But the climb over the toughness occurs at the limit frequency depend on the normal stress.3. The shear strength at a certain displacement, depends on the strength of the roughness components, in which fracture is occurring mainly. In the case that the climb over the roughness occurs, the shear strength is kept constant. This corresponds to the residual strength.4. The fracture of the surface roughness does not occur, until the peak shear strength appears. At the peak strength, the fracture develops at once to the some extent of higher frequency roughness.5. The normal dilatation accompanied with the shear displacement, also depends on the roughness components in which fracture is occurring mainly, or the limit frequency of the climb over roughness.

该项目获得的主要结果遵循1。据观察，在恒定正常应力的条件下，岩石不连续性的剪切测试在岩石不连续性之后，较高频率区域中不连续性的不连续性的表面粗糙度取决于正常应力。2。进行剪切位移，岩石不连续性的表面粗糙度的断裂发生在高频组件中，并发展为较低的组件。但是，韧性在极限频率下发生的攀爬取决于正常应力3。一定位移处的剪切强度取决于裂缝主要发生的粗糙度成分的强度。如果发生粗糙度的攀爬，则剪切强度保持恒定。这对应于残余强度4。直到出现峰剪切强度之前，才不会发生表面粗糙度的断裂。在峰值强度下，裂缝在一定程度上立即发育高频率粗糙度。5。正常的扩张伴随剪切位移，还取决于主要发生断裂的粗糙度成分，或者爬升的极限频率在粗糙度上。

项目成果

SAITO, Toshiaki: "Roughness of Rock Discontinuities and Their Shear Behavior" Poc. of 8th Japan Sympo. on Rock mechanics. 97-102 (1990)

SAITO, Toshiaki：“岩石不连续性的粗糙度及其剪切行为” Poc。

斎藤 敏明: "岩盤不連続面の表面形状特性がせん断強度に及ぼす影響" 第8回岩の力学国内シンポジウム講演論文集. 97-102 (1990)

Toshiaki Saito：“岩石不连续面的表面形状特征对剪切强度的影响”第八届全国岩石力学研讨会论文集97-102（1990）。

斎藤 敏明: "岩盤不連続面の表面形状特性がせん断強度に及ぼす影響について" 第8回岩の力学国内シンポジウム講演論文集. 97-102 (1990)

Toshiaki Saito：“论岩石不连续面的表面形状特征对抗剪强度的影响”第八届全国岩石力学研讨会论文集97-102（1990）。