地震学报（英文版）2002，Vol.15Issue(1)：47-55,9.
Physical meaning and prediction efficiency of the load/unload response ratio of rocks in strain-weakening phase before failure*
Physical meaning and prediction efficiency of the load/unload response ratio of rocks in strain-weakening phase before failure*
摘要
Abstract
Rock experiment results indicate that the load/unload response ratio (LURR) of rocks expressed via strain energy may have singular or negative value after the stress in the rock reaches its maximum before rock failure or when the rock goes into the strain-weakening phase. The universality of this phenomenon is discussed. Expressed via strain or strain energy and the travel time of P wave, the variation form of the reciprocal of LURR during the process of rock failure preparation is derived. The results show that after a sharp decrease the reciprocal of LURR reaches its minimum when the main fracture of the rock is about to appear. This feature can be taken as an indication that the rock main fracture is impending.关键词
strain-weakening phase/load/unload response ratio/prediction efficiencyKey words
strain-weakening phase/load/unload response ratio/prediction efficiency分类
天文与地球科学引用本文复制引用
许昭永,杨润海,王彬,赵晋明,王赟赟,梅世蓉..Physical meaning and prediction efficiency of the load/unload response ratio of rocks in strain-weakening phase before failure*[J].地震学报（英文版）,2002,15(1):47-55,9.基金项目
Key project from China Seismological Bureau (9691309020301) and State Natural Sciences Foundation of China (19732060). （9691309020301）
