Direct shear and tensile test on cemented healed joints from El Teniente mine, Chile

摘要

Direct shear and direct tensile tests have been conducted on specimens taken from drill cores of porphyry ore from the El Teniente mine containing infilled veins and bands of e g copper sulphide. The direct shear tests were conducted at different normal stress levels in order to determine the failure shear strengths. The direct tensile tests were conducted using stiff load frame in order to be able to obtain the complete stress-deformation curve and a set-up yielding a moment stiff fixation of the loading platens in order to prevent rotations. The tensile failure stress and fracture energy was computed in the cases when the failure was localized to the vein.