The invention discloses a triaxial rock mechanical testing
machine, which comprises a test unit, an axial
supercharger, a pressure chamber base, a pressure chamber base, a pressure chamber base and a pressure chamber base, wherein the test unit is arranged on the pressure chamber base and below the axial
supercharger; the pressure chamber cover is coaxially arranged with the axial
supercharger, can be lifted and is used for sealing the test unit; the gas confining
pressure system is used for providing confining pressure for the
test sample of the test unit in the sealed state; the
computer control system is connected with the gas confining
pressure system and used for controlling the gas confining
pressure system to provide confining pressure; the test unit comprises: a sleeve for filling a sample; a
heat conducting filler is arranged between the
heating furnace and the sleeve; the cage-shaped cooling
system is arranged on the outer side of the
heating furnace, and a first sensor and a second sensor are arranged between the cage-shaped cooling
system and the
heating furnace; the first sensor is axially coupled with the sample and is used for collecting the
axial strain of the sample; the second sensor is radially coupled with the sleeve and is used for collecting the radial strain of the sample. Confining pressure can be provided and deformation measurement can be realized at high temperature.