Mechanics of Fluid Saturated, Slip-Weakening Fault Zones

流体饱和、滑动减弱的断裂带的力学

• 批准号: 9526767
• 负责人: John Rudnicki
• 金额: $ 10.59万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526767&HistoricalAwards=false
• 关键词: Mechanics; Fluid; Saturated; Slip; Weakening

9526767 Rudnicki This research is a theoretical examination of the effects of coupling of shear deformation with pore fluid pressure changes on the stability of slip in fault gouge zones. Pore pressure alterations arise from shear-induced dilatancy or compaction and shear heating. The model incorporates idealizations of material behavior observed in laboratory experiments and estimated and measured in situ conditions. Numerical and asymptotic solution of the equations describing the model yield predictions of the evolution of fault slip and the temperature and pore pressure in the fault zone. The pressure and temperature changes predicted by the analysis provide a basis for the interpretation of hydrothermal mineralization and chemical alterations often observed in exhumed fault gouge zones. This research is a component of the National Earthquake Hazard Reduction Program. *** ??

9526767 rudnicki这项研究是对剪切变形与孔隙流体压力变化对断层岩层区域稳定性的耦合的影响的理论检查。 孔隙压力改变是由剪切引起的膨胀或压实和剪切加热产生的。 该模型结合了在实验室实验中观察到的材料行为的理想化，并在原位条件下进行了估计和测量。 方程的数值和渐近解决方案描述了模型的屈服预测断层滑移演变以及断层区温度和孔隙压力的预测。 分析预测的压力和温度变化为解释水热矿化和化学改变提供了基础，经常在杂种断层区域中观察到。 这项研究是国家地震危害计划的组成部分。 *** ??