Fracture Mechanics for Heterogeneous Materials and its Application to Controlled Blasting and Splitting
异质材料断裂力学及其在控制爆破和劈裂中的应用
基本信息
- 批准号:12450408
- 负责人:
- 金额:$ 5.25万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2001
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Although the rock is generally considered to be a heterogeneous material, the rock is usually treated as a homogeneous material in the fracture mechanics. In this study, the influence of heterogeneity on the crack growth in rock was analyzed and discussed.(1) Double-Torsion test was performed to investigate the anisotropy of subcritical crack growth behavior in granite that is a typically heterogeneous rock. The experimental results confirmed that subcritical crack growth in granite was anisotropic and depended on the direction of the crack growth. Furthermore, the geometry of crack path becomes smoother in the case that the crack propagates with lower stress level. These behavior and characteristics are caused by the oriented microcracks. From these results, it is concluded that the crack growth in heterogeneous rock takes place with lower fracture energy by linking of mierocracks existing nearby crack tip.(2) Mineralogical examination, physical properties measurement and slake durability tests of some argillaceous clastic rocks have been carried out and it was made clear that the mineral composition and texture of rocks in addition to smectite mineralogy have a great influence in rock durability.(3) A numerical simulation method based on the finite element method and fracture mechanics for heterogeneous rock was proposed. Analyzing fracture processes of rock splitting by the breaker and rock fragmentation in bench blasting, the mechanism of splitting and fragmentation were clarified.
虽然岩石通常被认为是一种非均质材料,但在断裂力学中,岩石通常被视为一种均质材料。本文分析和讨论了非均质性对岩石裂纹扩展的影响。(1)采用双扭试验研究了典型非均质岩石花岗岩亚临界裂纹扩展行为的各向异性。实验结果证实,花岗岩亚临界裂纹扩展具有各向异性,且与裂纹扩展方向有关。此外,在较低应力水平下裂纹扩展时,裂纹路径的几何形状变得更平滑。这些行为和特征是由取向微裂纹引起的。结果表明,非均质岩石的裂纹扩展是通过裂纹尖端附近微裂纹的连接以较低的断裂能进行的。(2)对部分泥质碎屑岩进行了矿物学检查、物性测量和湖泊耐久性试验,明确了除蒙脱石矿物学外,岩石的矿物组成和结构对岩石耐久性有很大影响。(3)提出了一种基于有限元法和断裂力学的非均质岩石数值模拟方法。分析了台阶爆破破岩破碎和破岩破碎的断裂过程,阐明了破岩破碎的机理。
项目成果
期刊论文数量(36)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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KANEKO Katsuhiko其他文献
KANEKO Katsuhiko的其他文献
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{{ truncateString('KANEKO Katsuhiko', 18)}}的其他基金
Self-sealability of fractures in rock and its application to fracture and strength control
岩石裂缝的自封闭性及其在裂缝和强度控制中的应用
- 批准号:
22246114 - 财政年份:2010
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Study on Micro-Restructuring of Rocklike Materials
类岩石材料的微观重构研究
- 批准号:
19206095 - 财政年份:2007
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Fracturing Design Method based on the Fractal Fracture Mechanics
基于分形断裂力学的压裂设计方法
- 批准号:
16206088 - 财政年份:2004
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Fragmentation controlled blasting
破碎控制爆破
- 批准号:
14350529 - 财政年份:2002
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Monitoring of Rock Slope Stability by the use of high Sensitive Tiltmeter
利用高灵敏度倾斜仪监测岩坡稳定性
- 批准号:
12555283 - 财政年份:2000
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Optimization of Smooth Blasting
平滑爆破优化
- 批准号:
10450387 - 财政年份:1998
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
THREE DIMENSIONAL VISUALIZATION OF ROCK FRACTURING PROCESS
岩石破裂过程的三维可视化
- 批准号:
08455487 - 财政年份:1996
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of VSP Probe for Inspection of Blast Damaged Zone
爆炸损伤区检测用VSP探头的研制
- 批准号:
08555260 - 财政年份:1996
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
岩石の圧縮破壊過程とそのメカニズムに関する研究
岩石压缩断裂过程及其机理研究
- 批准号:
06452361 - 财政年份:1994
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
可逆形状記憶合金を用いた岩石破砕器の開発
可逆形状记忆合金岩石破碎机的研制
- 批准号:
03555137 - 财政年份:1991
- 资助金额:
$ 5.25万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
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岩石破裂与诱发地震室内控制实验
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