... that the specimens could be heated to the assigned value from the outside to the inside and then the specimens were taken out and cooled down in the air. The experiment used displacement control mode, and the loading rate is 0.0015 mm/s. reservoir geomechanics Rock Deformation peak strength plastic...

... length and confining pressure (as shown in figure a, b), fissure inclination has a little effect on the peak strength of the rock samples, the impact of the fissure inclination to the peak strength decreases as the confining pres- sure increases. The two rock samples that the fissure length is 12 mm...

...- uous mechanics method mainly manifests in the later peak strength in application. From this point of view, discontinuous method can replace continuous mechanics method. 3 DESCRIPTION ON SITE DAMAGE ZONE CHARACTERISTIC All of the fracture forms in surrounding rock are dam- age zone performance...

... testing under confining pressures to 4 MPa (8 steps). The peak strengths of various instances thus obtained are shown in table 2. Table 2: The peak axial strength, samples under various confining pressures 3(MPa) 0.5 1 Intact 1(MPa) 1 1 .6 7 1 3 .3 2 0.00 00 1.00 06 2.00 06 3.00 06 4.00 06 5.00 06...

... is discussed in terms of stress-strain curves, fracture patterns as well as peak strength. Then another six true triaxial compression tests are undertaken under true triaxial loading stress to study the intermediate principal stress effect. In conventional triaxial compression tests, the orientation...

... properties of rock masses were decreased to about 50% of those values of rock mass without joints. And the behavior of the rock mass changed from brittle to perfectly plastic with increase in the number of joints. Also the values of Young's modulus, Poisson's ratio and peak strength are almost similar from...