The Hydromechanical Performance of Idealized Rock Fissures

理想化岩石裂隙的流体力学性能

• 批准号: 8708976
• 负责人: Derek Elsworth
• 金额: $ 6万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-06-01 至 1990-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708976&HistoricalAwards=false
• 关键词: Hydromechanical; Performance; Idealized; Rock; Fissures

Characterization of the behavior of saturated rock asses to imposed perturbations in effective stress is of fundamental importance in understanding response in rock engineering and tectonophysics. Of particular interest are the changes in hydraulic conductivitry that may be manifest under relatively limited shear displacement across rock joints. Where normal stresses are low, relative to the strength of asperities comprising the joint wall, dilational opening will greatly increase the void volume of the mass. Since the potential for hydraulic discharge is increased proportionally to the cube of the joint aperture change, extremely large conductivity enhancements may occur for modest shear offsets. The fundamental parameters controlling this phenomenon are investigated by conducting laboratory and analytical appraisals of conductivity enhancement of sheared joints. Analytical studies will allow the expected performance of idealized joint profiles to be quantified prior to testing. The suite of laboratory tests, conducted in large scale (12x12x12 inch blocks) and under shear loading, will allow direct comparison with the analytical results.

饱和岩体在外加应力作用下的特性 有效应力的扰动对于 理解岩石工程和构造物理学的响应。 的 特别令人感兴趣的是水力传导性的变化， 在相对有限的岩石剪切位移下， 接头. 当正应力较低时，相对于 包括接缝壁的凹凸不平，扩张开口将大大 增加物质的空隙体积。 由于潜在的 液压排放量与水的立方成比例地增加， 接头孔径变化、极大的导电性增强可 对于适度的剪切偏移发生。 基本参数控制 这种现象是通过进行实验室研究， 剪切接头导电性增强的分析评价。 分析研究将允许理想化的预期性能 在测试前对接缝轮廓进行量化。 套件 实验室测试，在大规模（12x12x12英寸块）进行， 在剪切载荷下，将允许直接与分析比较 结果