Fundamental study on strength of rock under high water vapor pressure
高水汽压下岩石强度基础研究
基本信息
- 批准号:09651031
- 负责人:
- 金额:$ 2.37万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1997
- 资助国家:日本
- 起止时间:1997 至 1998
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The strength of rocks is affected by the density, the shape and the direction of cracks, the strain and stress rate of loading, the stress state, the temperature and the existence of water in vapor phase or in liquid phase, and so on. Many researchers have indicated that the strength of rocks is dependent on the suberitical crack growth due to stress corrosion.The stress corrosion crack growth occurs because the chemical action of an environmental agent, such as water, weakens the strained bonded at crack tips and facilitates crack propagation, and the crack velocity as a stress intensity factor is exceeded the stress corrosion limit increases with increasing water vapor pressure. Charles, Krokosky et at. and Mizutani et al. have shown the experimental results that the strength of rocks under uniaxial compression test increases with decreasing water vapor pressure in atmosphere. Accordingly, it is considered that the strength of rocks may be controlled by surrounding environment of roc … More ks, based on the above facts.In this research, to examine the influence of non-atmospheric environment, namely water, acetone, ethanol, methanol in vapor phase and hydrogen as the stress corrosion agent, on the strength of rock, uniaxial compression test and disc lest under the vapor pressure of the range from 10^<-3> to 10^6 Pa are conducted on Kumamoto andesite.From the experimental results, it is made clear that tie compressive and tensile strength of Kumamoto andesite increases with decreasing the water vapor pressure and that water is tie most effective agent which promotes the stress corrosion among them. Since the degree of influence of these materials on the compressive strength is the same as that on the tensile strength, it is considered that the mechanism of the fracture under compressive and tensile stress state is almost the same. Finally, it is shown that the strength of rock under inorganic gas environment, like hydrogen, Argon, nitrogen and oxygen, is two times as much as that under the same water vapor pressure. Less
岩石的强度受密度、裂纹的形状和方向、加载的应变和应力速率、应力状态、温度以及气相或液相水的存在等影响。许多研究人员指出,岩石的强度取决于应力腐蚀引起的近温裂纹扩展。应力腐蚀裂纹扩展的发生是因为环境剂(例如水)的化学作用削弱了裂纹尖端的应变结合并促进裂纹扩展,并且作为应力强度因子的裂纹速度超过了应力腐蚀极限,随着水蒸气压力的增加而增加。查尔斯、克罗科斯基等。和水谷等人。实验结果表明,单轴压缩试验下岩石的强度随着大气中水蒸气压的降低而增加。据此,基于上述事实,认为岩石的强度可能受岩石周围环境的控制。本研究旨在考察非大气环境,即水、丙酮、乙醇、气相甲醇和氢气作为应力腐蚀剂对岩石强度的影响,在蒸汽压10^<-3>至10^<-3>范围内进行单轴压缩试验和圆盘试验。 在熊本安山岩上进行了10^6 Pa试验。实验结果表明,熊本安山岩的抗压和抗拉强度随着水蒸气压的降低而增大,水是促进其中应力腐蚀最有效的剂。由于这些材料对抗压强度的影响程度与对抗拉强度的影响程度相同,因此认为压、拉应力状态下的断裂机理几乎相同。最后表明,在氢、氩、氮、氧等无机气体环境下,岩石的强度是相同水蒸气压下的两倍。较少的
项目成果
期刊论文数量(0)
专著数量(0)
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Y.Obara, H.Horikawa and K.Sugawara: "The Strength of Rocks under Lower Water Vapor Pressure" Proc.of the Korea-Japan Joint Symp.on Rock Engineering, Korea (Seoul). 109-114 (1996)
Y.Obara、H.Horikawa 和 K.Sukawara:“较低水蒸气压力下岩石的强度”Proc.of the Korean-Japan Joint Symp.on Rock Engineering,韩国(首尔)。
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- 影响因子:0
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- 通讯作者:
Y.Obara,H.Horikawa,K.Sugawara: "The strength of rocks under lower water vapor pressure" Proc.Korea-Japan Joint Symp on Rock Eng. 1. 109-114 (1996)
Y.Obara,H.Horikawa,K.Sukawara:“较低水蒸气压力下岩石的强度”Proc.Korea-Japan Joint Symp on Rock Eng。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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- 通讯作者:
Y. Obara, H. Horikawa, K. Sugawara: "The strength of rocks under lower water vapor pressure" Proc. Korea-Japan Joint Symp. on Rock Eng.1. 109-114 (1996)
Y. Obara、H. Horikawa、K. Sukawara:“较低水蒸气压力下岩石的强度”Proc。
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Y. Obara, K. Sugawara: "Strength of rock under non-atmospheric environment" Proc. Int Coug. ISRM. (1999)
Y. Obara,K. Sukawara:“非大气环境下岩石的强度”Proc。
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Obara, Y., S.S.Kang, J.Otani, A.Sato and K.Sugawara: "Strength of Rock under Non-atmospheric Environment" Proc.Int.Cong.ISRM,France (Paris). (to be published). (1999)
Obara, Y.、S.S.Kang、J.Otani、A.Sato 和 K.Sukawara:“非大气环境下的岩石强度”Proc.Int.Cong.ISRM,法国(巴黎)。
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{{ truncateString('OBARA Yuzo', 18)}}的其他基金
Innovation of fracture toughness test for new horizon of rock fracture mechanics
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- 批准号:
25630416 - 财政年份:2013
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$ 2.37万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Visualization innovation of structure and phenomena in the geo-materials leaded by non-destructive visualization method, X-ray CT method
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- 批准号:
23246156 - 财政年份:2011
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Development of design method for support system of cavern using cable bolt
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15360477 - 财政年份:2003
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Study on the stability of roof beam consisted of cracked rock
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07651151 - 财政年份:1995
- 资助金额:
$ 2.37万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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