Hierarchical true triaxial pressure head with acoustic emission system based on lamination design

The invention discloses a staged true triaxial pressure head with an acoustic emission system based on lamination design, and relates to the technical field of rock mechanics tests, the staged true triaxial pressure head comprises a plurality of staged loading pressure heads arranged in a true triaxial loading frame, and the staged loading pressure heads are symmetrically arranged in XYZ directions and are used for loading rock samples; the staged loading pressure head comprises a first-stage pressure head and a second-stage pressure head, one end of the first-stage pressure head is fixedly connected with the second-stage pressure head, and the other end of the first-stage pressure head is used for being in contact with a rock sample; and an acoustic emission monitoring system is arranged in the primary pressure head. While the acoustic emission monitoring system is protected from being damaged, the close contact between the acoustic emission monitoring system and the rock sample is realized, the path for tra