Research on the synthetic evaluation of the discontinuity in rocks

岩石间断面综合评价研究

• 批准号: 61302072
• 负责人: TERADA Makoto
• 金额: $ 2.88万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61302072/
• 关键词: Discontinuity in Rocks; Characteristics of Discontinuous Planes; Surface Configuration; Fractal Dimension; Double-Torsion Test; Propagation Velocity; スキャンライン法

The mechanical behavior of discontinuous rock masses in mainly determined by the properties of discontinuities, because the stiffness of discontinuities is greatly different from that of rock substances. Especially, the displacement is influenced by the configuration of discontinuity. Its configuration has usually an irregular surface.In this research, the surface configuration of rocks was measured as wave shape by the surface profiler and the frquency analysis was carried out on the obtained wave. The resulting power spectrum of the wave showed a characteristic curve against its frequency. It was found that the fractal dimension might be determined by this analysis on the surface configuration of rocks. Before and after a shearing test of the rock specimen with an artificial shear plane, the values of fractal dimension measured on the configuration of the shear plane were compared. It was found that the significant relationship between the fractal dimension and the strength exists in some rocks.On the other hand, the double-torsion test was carried out on several rocks. The fractal dimension was also examined on the crack surface developed by this test, regarding with the propagation velocity of crack. For these results, if the fractal dimension of the discontinuous planes can be measured, it seems to become a valuable index showing the mechanical properties of discontinuity in rocks.The scan-line method to evaluate the distribution of discontinuous planes in rock masses was developed and examined practically at some mines. The general formula for this evaluation was induced and the problems to use this method were considered. It was found that this method has a successful usage.

不连续的岩石质量的机械行为主要由不连续性的特性确定，因为不连续性的刚度与岩石物质的刚度大不相同。特别是，位移受到不连续性的配置的影响。它的构型通常具有不规则的表面。在这项研究中，岩石的表面配置通过表面剖面仪测量为波形，并在获得的波浪上进行了频率分析。波浪的产生功率谱显示出具有其频率的特征曲线。发现分形维度可以通过对岩石表面构型的分析来确定。在用人造剪切平面对岩石样品进行剪切测试之前和之后，比较了在剪切平面构型上测得的分形尺寸的值。发现分形维度与强度之间存在的显着关系存在于某些岩石中。另一方面，在几块岩石上进行了双重测试。还检查了该测试开发的裂纹表面上的分形维度，以涉及裂纹的传播速度。对于这些结果，如果可以测量不连续平面的分形维度，则它似乎成为一个有价值的指数，显示了岩石中不连续性的机械性能。扫描线方法评估了岩石质量中不连续平面的分布的分布，并且实际上在某些矿山检查了。引起了该评估的一般公式，并考虑了使用此方法的问题。发现这种方法具有成功的用法。

项目成果

Murata, Sumihiko, et al.: "Fundamental studies on the effect of surface roughness to the shearing strength of discontinuities in rocks." Proceedings of the 8th West Japanese Geomechanics Symposium (in Japanese). 8. 43-48 (1987)

Murata、Sumihiko 等人：“表面粗糙度对岩石不连续性剪切强度影响的基础研究。”

佐野 修: 材料. 37. 152-158 (1988)

佐野修：材料。37。152-158（1988）

柴 柘海: 日本鉱業会昭和63年度春季大会研究業積発表講演会講演要旨集. (1988)

Tsukai Shiba：日本矿业协会 1988 年春季会议演讲摘要集（1988 年）。

Kaneko, Katsuhiko, et al.: "Quantitative evaluation of discontinuities in rocks" Proceedings of the Spring meeting, the Mining and Metallurgical Institute of Japan, 1987. 9-10 (1987)

Kaneko、Katsuhiko 等人：“岩石中不连续性的定量评估”日本矿业冶金学会春季会议记录，1987 年。 9-10 (1987)

Sano, Osamu: "Experimental study of anisotropy of stress corrosion cracking in rocks by doubli-torsion method" Journal of the Society of Material Science, Japan. 37. 152-158 (1988)

Sano, Osamu：“通过双扭转法对岩石中应力腐蚀开裂各向异性进行的实验研究”，日本材料科学学会杂志。