Fractography in fracturing process of rocks

岩石破裂过程中的断口成像

• 批准号: 59890010
• 负责人: IWAMATSU Akira
• 金额: $ 5.25万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59890010/
• 关键词: Triaxial test of rocks; Fractography; Digital universal stage; ボアスコープ; フラクトグラフィー; 光ファイバー

Study of the fracturing process of rocks is very important not only for rock mechanics and structural geology, but also for the researches of the genesis and prospecting of vein-type ore deposits and fissure-filled reservoirs of hydrocarbon and geothermal energy. Fractures are observed and described in the various stages of triaxial compression tests of rocks. Digital universal stage is manufactured to measure the attitude of fractures in thin sections and to process the attitude data automatically. Secondly fracturing process in the high pressure vessel is recorded in video tapes by using the bore-scope. In early stages of fracturing, intragranular micro-cracks parallel to medium principal stress are produced at grain-by-grain contacts in whole area of a test specimen. Grain boundary cracks or micro-shear fractures are also developed parallel to the inclined planes to maximum principal stress. In last stage a major shear fracture oblique to the maximum principal stress is produced in central part of the specimen to connect these micro-cracks.

岩石破裂过程的研究不仅对于岩石力学和构造地质学，而且对于脉状矿床、裂隙充填油气藏和地热能的成因和找矿研究具有重要意义。在岩石三轴压缩试验的各个阶段观察和描述裂缝。制造数字万能平台，用于测量薄片中裂缝的姿态并自动处理姿态数据。其次，利用内窥镜将高压容器内的压裂过程记录在录像带中。在破裂的早期阶段，在试件的整个区域的颗粒与颗粒接触处产生平行于中等主应力的晶内微裂纹。晶界裂纹或微剪切断裂也平行于最大主应力的斜面发展。在最后阶段，在试样的中心部分产生与最大主应力倾斜的主要剪切断裂以连接这些微裂纹。

项目成果

日本地質学会第93年学術大会講演要旨集. 1986.

日本地质学会 1986 年第 93 届学术会议摘要。

安武由充: 鹿児島大学理学部紀要(地学・生物学). 19. 133-147 (1986)

Yoshimitsu Yasutake：鹿儿岛大学理学院通报（地球学和生物学）19. 133-147 (1986)。

YASUTAKE, Yoshimichi: "Very brittle and brittle fractures of experimentally deformed rocks" Science Report of Kagoshima University (Geology and Biology). 19. 133-148 (1986)

YASUTAKE、Yoshimichi：“实验变形岩石的极脆性和脆性断裂”鹿儿岛大学科学报告（地质学和生物学）。

岩松暉: 日本地質学会第93年学術大会講演要旨集. 571 (1986)

Iwamatsu Akira：日本地质学会第 93 届学术会议摘要 571（1986）。

IWAMATSU, Akira: "Preliminary report of the fractography of rocks under triaxial compression tests" Abstract of annual meeting of the geological society of Japan. 1986. 571 (1986)

IWAMATSU, Akira：“三轴压缩试验下岩石断裂的初步报告”日本地质学会年会摘要。