Ring shear and seepage-coupled apparatus and ring shear and seepage-coupled test system for rock and rock fracture under tension or compression stress

A ring shear and seepage-coupled apparatus for rock and rock fracture under tension or compression stress, comprising a first frame, a second frame, a first bottom plate, a second bottom plate, an axial piston rod, a torque transferring shaft, an axial force transducer, a torque transducer, an upper shear box, a lower shear box and a seepage structure,

• wherein the first frame is in fixed connection with the first bottom plate, the second frame is in fixed connection with the second bottom plate, the first frame is positioned between the first bottom plate and the second bottom plate, and the second frame is positioned at a side of the second bottom plate, with the side away from the first bottom plate;
• the upper shear box and the lower shear box are positioned in the second frame, a specimen is fixedly arranged between the upper shear box and the lower shear box, and the upper shear box, the lower shear box and the specimen are positioned on a same axis;
• the torque transducer is provided on the torque transferring shaft;
• the torque transferring shaft has one end fixedly connected onto the first bottom plate, and the other end penetrating through the second bottom plate and fixedly connected with the lower shear box, so as to transmit a torque to the specimen;
• the axial force transducer is provided on the axial piston rod, and the axial piston rod is in fixed connection with the upper shear box, for applying an axial load on the specimen;
• and
• the seepage structure comprises a circumferential seepage structure and a radial seepage structure, wherein the circumferential seepage structure is configured for performing a circumferential seepage test, and the radial seepage structure is configured for performing a radial seepage test.