Question: A triaxial test is conducted on a rock sample with a joint inclined at an angle of 3 5 deg to the horizontal. The

A triaxial test is conducted on a rock sample with a joint inclined at an angle of 35\deg to the horizontal. The properties of the intact rock and the joint are given as follows: for intact rock, c=6 MPa, -40\deg ; for joint, c,=2 MPa, $=26\deg . The confining pressure for the test is 10 MPa. Determine which will fail first, the intact rock or the joint?Give numerical justification for your answer.

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