The state of stress and strain in a rock mass around a single working

1972 ◽  
Vol 8 (4) ◽  
pp. 462-465 ◽  
Author(s):  
M. T. Alimzhanov
Keyword(s):  
Rock Mass ◽  
The State ◽  
Stress And Strain ◽  
State Of Stress

The State of Stress and Strain Adjacent to Notches in a New Class of Nonlinear Elastic Bodies

2019 ◽  
Vol 135 (1-2) ◽  
pp. 375-397 ◽  
Author(s):  
Vojtěch Kulvait ◽  
Josef Málek ◽  
K. R. Rajagopal
Keyword(s):  
The State ◽  
Stress And Strain ◽  
New Class ◽  
Elastic Bodies ◽  
State Of Stress ◽  
Nonlinear Elastic

Stress and Strain in Spinning Paraboloid Dishes

1959 ◽  
Vol 81 (1) ◽  
pp. 43-50
Author(s):  
M. J. Cohen
Keyword(s):  
Angular Distance ◽  
The State ◽  
Stress And Strain ◽  
Shear Stresses ◽  
Simple Arithmetic ◽  
State Of Stress ◽  
Actual Evaluation

The following is an investigation to determine completely the state of stress and strain in spinning paraboloid dishes both whole and holed at the center. The material of the dish is homogeneous and its thickness is constant. The results comprise expressions for the radial, hoop, and shear stresses, the bonding moments, and deformation induced by the spinning of the dish in terms of the angular distance from the center of the dish. Tables at the end of the paper make the actual evaluation of these stresses, moments, and deformations a matter of simple arithmetic.

The effect of stress on the primary permeability of rock cores—a facet of hydraulic fracturing

1981 ◽  
Vol 18 (2) ◽  
pp. 195-204 ◽  
Author(s):  
R. Heystee ◽  
J.-C. Roegiers
Keyword(s):  
Rock Mass ◽  
Hydraulic Fracturing ◽  
The State ◽  
Stress Conditions ◽  
Breakdown Pressure ◽  
Rock Types ◽  
State Of Stress ◽  
Pressurization Rate ◽  
Fluid Penetration ◽  
Fracturing Experiments

Recent laboratory hydraulic fracturing experiments have shown that fluid penetration into the rock mass adjacent to the borehole being pressurized has a significant influence on the magnitude of the breakdown pressure. One factor affecting the degree of penetration of the pressurizing fluid is the permeability of the rock mass, which in turn is a function of the state of stress present in the rock mass. To study this permeability–stress relationship, a radial permeameter was constructed and three rock types tested. Derived expressions show that during radially divergent and convergent flow in the permeameter, the state of stress in the rock specimen is tensile and compressive respectively. The radial permeameter test results show that the permeability of rock increases significantly under tensile stress conditions and reduces under compressive stress conditions. The results from this study were used to develop a conceptual model which explains the dependency of breakdown pressure levels on the pressurization rate.

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