A mechanism and characteristic analysis of rock core discing in the in-situ stress survey on deep coalmine

2010 ◽  
pp. 271-274
Author(s):  
Y Jiang ◽  
T Wang ◽  
L Hu ◽  
S Tian
Keyword(s):  
In Situ Stress ◽  
Characteristic Analysis ◽  
Core Discing

Determination of three-dimensional directions of in situ stress from core discing

Rock Stress ◽  
2020 ◽  
pp. 237-243
Author(s):  
K. Matsuki ◽  
N. Kaga ◽  
T. Yokoyama ◽  
N. Tsuda
Keyword(s):  
Three Dimensional ◽  
In Situ Stress ◽  
Core Discing

scholarly journals Effects of In-situ Stress on Thickness of Disc in Core Discing

2002 ◽  
Vol 118 (10,11) ◽  
pp. 650-658 ◽  
Author(s):  
Noriyuki KAGA ◽  
Koji MATSUKI ◽  
Kiyotoshi SAKAGUCHI
Keyword(s):  
In Situ Stress ◽  
Core Discing

Estimation of magnitudes of three-dimensional in situ stress from core discing

Rock Stress ◽  
2020 ◽  
pp. 245-251
Author(s):  
N. Kaga ◽  
K. Matsuki ◽  
T. Yokoyama ◽  
N. Tsuda
Keyword(s):  
Three Dimensional ◽  
In Situ Stress ◽  
Core Discing

scholarly journals A Method for Estimating Three-dimensional Directions of In-situ Stress from Geometry of Core Discing.

2002 ◽  
Vol 118 (10/11) ◽  
pp. 659-666
Author(s):  
Koji MATSUKI ◽  
Noriyuki KAGA ◽  
Kiyotoshi SAKAGUCHI
Keyword(s):  
Three Dimensional ◽  
In Situ Stress ◽  
Core Discing

The effect of sample disturbance on laboratory properties of Lac du Bonnet granite

1994 ◽  
Vol 31 (5) ◽  
pp. 692-702 ◽  
Author(s):  
C. Derek Martin ◽  
Brian Stimpson
Keyword(s):  
In Situ Stress ◽  
P Wave ◽  
Confining Stress ◽  
Near Surface ◽  
Brittle Rocks ◽  
Frictional Properties ◽  
Stress Dependent ◽  
Sample Disturbance ◽  
Core Discing

Laboratory properties of Lac du Bonnet granite samples collected at depths ranging from near-surface to 1000 m were established. The laboratory properties indicated that either the in situ properties were changing with depth or the samples were changing with depth. Comparison of P-wave velocities in the samples and in situ confirmed the latter, i.e., sample disturbance was affecting the laboratory properties. The strength of the damaged samples indicated that sample disturbance affected the cohesion of the material, not the frictional properties, and that the cohesion loss cannot be accounted for, by applying a confining stress. Sample disturbance started to affect the laboratory properties of Lac du Bonnet granite when the maximum far-field in situ stress exceeded about 10% of the unconfined compression strength. Key words : sample disturbance, core discing, cohesion, brittle rocks, damage, microcracks, stress-dependent Young's modulus.

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