Abstract: After the underground metal mine is transited into the deep mining， the engineering disasters such as rock burst and creep of the hard rock are arising， The experiment is a fundamental approach to discover its failure mechanism. Due to the characterization of high strength and elastic-brittle in hard rock， it is difficult to investigate the post-failure behavior by using the conventional rock triaxial apparatus； Furthermore， a high accuracy transducer is needed for slight deformation and creep measurement. In view of this， combining with the development experience in the international advanced rock triaxial servo system， the feasible scheme and strengthening index of the system are put forward to meet the requirements of the hard rock failure process tests and the rheological test. Rockman 207 rock triaxial apparatus has been cooperatively developed with Changchun Chaoyang Test Instrument Co.， Ltd. With features of high stiffness， rapid servo response speed and high precision in measuring volume change， the system can meet the needs of short-term full failure process test and long-term rheological test for the mechanical tests of hard rock viewed from the verification and preliminary test results.

Key words: Triaxial apparatus for hard rock, Elastic-brittle, Complete stress-strain curve, Rheology, Deep mining