根据钻孔崩落资料确定剑川地区应力场方向  

CONTEMPORARY ORIENTATION OF TECTONIC STRESS FIELD IN THE JIANCHUAN DETERMINED FROM THE BOREHOLE BREAKOUTS

作　　者：翟青山[1] 毛吉震[1] 张钧[1] 魏庆云 李方全[1] 

机构地区：[1]国家地震局地壳应力研究所

出　　处：《地震地质》1989年第2期46-64,共19页Seismology and Geology

基　　金：地震学联合科学基金

摘　　要：本文论述了钻孔崩落的力学机制、产生环境及其与现今构造应力场的关系,介绍了超声波井下电视的测井原理、操作技术和钻孔崩落测井资料分析方法。根据一口800米深钻孔的超声波井下电视测井获得的崩落资料,确定剑川地震活动区最大水平主应力方向为N20°E。这与近两年来在该区采用水压致裂法测定的最大水平主压应力方向N15°E是十分一致的。The mechanism of borhole breakouts, its formation environment and relation with the present-day tectonic stress field are presented in this paper; The logging principle of ultrasonic borehole televiewer, operating techniques and analyzing method of borehole breakout data are also described. In high seismic area of Jianchuan, the orientation of the maximum horizontal compressive stress is N20°E determined by the borehole breakouts obtained from the ultrasonic borehole televiewer logging data in an 800m deep well, It is very consistent with N15°E of those measured using the hydraulic fracturing method in the same well.

关 键 词：钻孔崩落 应力场 方向 地震活动区 

分 类 号：P315.5[天文地球—地震学]