In situ stress measurements in stratified hard rock formations

1987 ◽  
Vol 24 (1) ◽  
pp. A15
Keyword(s):  
Hard Rock ◽  
In Situ Stress ◽  
Stress Measurements ◽  
Rock Formations ◽  
In Situ Stress Measurements

In situ stress measurements in some near-surface rock formations – Thorold, Ontario

1976 ◽  
Vol 13 (1) ◽  
pp. 1-7 ◽  
Author(s):  
J. H. L. Palmer ◽  
K. Y. Lo
Keyword(s):  
In Situ Stress ◽  
Rock Unit ◽  
Comprehensive Investigation ◽  
Near Surface ◽  
Stress Measurements ◽  
Rock Formations ◽  
Dependent Behavior ◽  
Major Principal Stress ◽  
In Situ Stress Measurements

Performance of some structures constructed in rocks in southern Ontario have shown severe distress. It has been hypothesized that the problem is due to the high horizontal stresses existing in the rock formations. As part of a comprehensive investigation into the stress relief and time-dependent behavior of the rocks in this area, in situ stress measurements were carried out at a location near the Thorold Tunnel to a depth of 81 ft (25 m). The technique and procedure used are described in detail. It was found that high horizontal stresses, varying from 1200 to 2100 psi (8300 to 14500 kPa) exist in each rock unit encountered. The direction of the major principal stress in the horizontal plane appears to be orientated at N 60° E.

Estimation of the present-day stress field using in-situ stress measurements in the Alxa area, Inner Mongolia for China's HLW disposal

2017 ◽  
Vol 220 ◽  
pp. 76-84 ◽  
Author(s):  
Jianju Du ◽  
Xianghui Qin ◽  
Qingli Zeng ◽  
Luqing Zhang ◽  
Qunce Chen ◽  
...  
Keyword(s):  
Stress Field ◽  
Inner Mongolia ◽  
In Situ Stress ◽  
Stress Measurements ◽  
In Situ Stress Measurements
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