Multi-Crack Characterization

多裂纹表征

• 批准号: 05232102
• 负责人: TAKAYASU Hideki
• 金额: $ 76.16万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05232102/
• 关键词: Fractals; Fracture; Multi-crack; Microseismicity; Universality class; Impact fracture; Lineament; Subsurface crack model; 準静的破壊; S波スプリッティング

Results obtained during the research term (1993-1995) are summarized for each researcher in the following :(1) We investigated universal properties of fracture by numerical simulations. It was proven that strong macroscopic universality holds both in the cases of crack propagation model on a plane and of 3-dimensional impact fracture (Takayasu).(2) Asynthetic modelling of geothermal structure was developed which accounts for the heat discharge at the surface, the subsurface temperature, the electric resistivity structure, the Curie point depth and the inert gas composition of fumarolic gas (Yusa).(3) The multiple cracking behavior in rock was examined based on the fractal nature of acoustic emission (AE). It is demonstrated that the multiple cracking behavior in rock could be analyzed using a numerical model in conjunction with the AE results (Hashida).(4) The conditions for propagation and unstable oscillation of cracks were characterized by nondimentional fracture parameters for both … More single crack and multiple cracks (Sano).(5) A new method of detecting and monitoring fractures by use of seismic waves was proposed. The effect of injecting air into fracture was nvestigated by using both model experiments and numerical simulations. An AVO inversion method and a depth transform technique of seismic reflection data were developed. A current-convergent resistivity log by adding auxiliary sources was investigated (Sasa).(6) A fractal model to quantify the crack distribution in rock masses and a method to evaluate model input parameters by a lineament analysis of earth satellite image have been proposed. By applying the proposed method to a granite field, the crack distribution and the connectivity of cracks have been estimated (kaneko).(7) Analytical data of aero-photo and satellite images were compared with geologically identified natural fracture systems. Geologically undefined lineaments were traced by gamma ray survey. A new analytical method for satellite image was introduced (Takashima).(8) The fractal analysis on the 1500 faults of 6 groups suggests that the relationship between the width of shear zone and fault displacement, size (displacement) distribution, and the spatial distributions of faults and fault displacements show the fractal distributions whose fractal dimensions change depending on the ductility of rocks and the total energy density injected (Ohtsuki).(9) The structure of elastic wave velocity and density of the crust is known to be heterogeneous. Analyzing the well-log data obtained at 5 wells in Kyushu and Kanto, Japan, we found that their power spectra obey a power law for a wide range in wavelength from a few tens of centimeters to a few hundred meters (Sato).(10) Fractal dimensions of splitting fracture surface of welded tuff specimens using by divider method are nearly in inverse proportion to the strength. On the other hand, the coefficient of variation of dimensions near the pre-crack in CT specimens are nealry in proportion to the fracture toughness (Tano). Less

在以下研究人员中总结了研究术语（1993-1995）中获得的结果：（1）我们通过数值模拟研究了骨折的普遍特性。事实证明，强大的宏观宇宙在平面上的裂纹繁殖模型和3维冲击裂缝（Takayasu）的情况下都保持着。（2）地热结构的异常建模是开发的，这是由于表面上的热量排放，是表面上的热量排放的，是电阻的温度，电抗性尖端的速度率和屈服于屈服的速度（3）。根据声发射（AE）的分形性，检查了岩石中的行为。证明，可以使用数值模型与AE结果结合（Hashida）分析岩石中的多重裂纹行为。（4）通过非限定性分裂参数来表征裂纹的传播和不稳定裂纹的条件…通过……通过使用新的方法（5）来检测新方法。使用模型实验和数值模拟研究了将空气注射到断裂中的影响。开发了一种AVO倒置方法和地震反射数据的深度变换技术。研究了通过添加辅助源（SASA）的电流抗抗性对数。（6）一种分形模型，用于量化岩石质量中的裂纹分布，并提出了一种通过接地卫星图像的线性分析来评估模型输入参数的方法。通过将提出的方法应用于花岗岩场，已经估计了裂纹分布和裂纹的连通性（Kaneko）。（7）将Aero-Photo和卫星图像的分析数据与地质鉴定的天然断裂系统进行了比较。通过Gamma Ray调查来追溯地质不确定的谱系。引入了一种新的卫星图像分析方法（takashima）。（8）对6组的1500故障的分形分析表明，剪切区域的宽度与故障位移的宽度与故障位移的宽度，大小（位移）分布以及空间分布以及断层位移的空间分布表明其分类分布的总和在岩石上的总体依赖于岩石的总和，岩石上的岩石上的岩石上的依次依赖于岩石上的岩石上的岩石上的依据，这些岩石的依次是岩石上的降落型，这些岩石的依次依赖于岩石上的rock依次差异。 （ohtsuki）。（9）已知弹性波速度和密度的结构是异质的。分析在日本京都和关东的5口井中获得的井log数据，我们发现它们的功率谱遵守幂律，从几十厘米到几百米到几百米（SATO）的波长范围很广。（10）使用除型塔夫表面的分布式裂纹表面使用除非分数的分数，这是分数的优势。另一方面，CT样品中裂缝附近尺寸的变化系数与断裂韧性（TANO）成比例。较少的

项目成果

大沢信二・由佐悠紀・北岡豪一: "霧島火山群の噴気不活性ガス組成" 温泉科学. 45. 290-294 (1995)

Shinji Osawa、Yuki Yusa、Goichi Kitaoka：“雾岛火山群喷气孔惰性气体的组成”《温泉科学》45. 290-294 (1995)。

Sato,H: "Formulation of the multiple non-isotropic scattering process in 3-D space on the basis of the energy transport theory" Geophys.J.Int.121. 523-531 (1995)

Sato,H：“基于能量传输理论的 3D 空间中多重非各向同性散射过程的公式化”Geophys.J.Int.121。

K.Watanabe and H.Takahashi: "Parametric Study of the Energy Extraction from Hot Dry Rock Based on Fractal Fracture Network Model" Geothermics. 24-3. 223-236 (1995)

K.Watanabe 和 H.Takahashi：“基于分形断裂网络模型的干热岩石能量提取的参数研究”地热学。

H.Inaoka and H.Takayasu: "Universal fragment size distribution in a numerical model of impact fracture" Physica A. 229. 5-25 (1996)

H.Inaoka 和 H.Takayasu：“冲击断裂数值模型中的通用碎片尺寸分布”Physica A. 229. 5-25 (1996)

佐野雅己: "破壊の非線形ダイナミクスから統計物理へ" 応用物理学会誌. 64. 793-797 (1995)

佐野正美：“从断裂的非线性动力学到统计物理学”日本应用物理学会杂志 64. 793-797 (1995)。