Device and system for measuring omnidirectional stress of drill hole

The utility model discloses a device and a system for measuring the omni-directional stress of a drill hole. The measuring device for the omni-directional stress of the drill hole comprises a measuring pipe, the measuring pipe is provided with at least three convex parts, each convex part extends in the length direction of the measuring pipe, the length of each convex part is equal to that of the measuring pipe, the convex parts are evenly distributed in the circumferential direction of the measuring pipe, and the measuring pipe is suitable for being integrally deformed outwards when the internal pressure of the measuring pipe is increased. The perimeter of the cross section pattern of the measuring tube is not changed before and after deformation, and the convex parts are suitable for abutting against the inner wall of the drill hole after the measuring tube is deformed. The system for measuring the omnidirectional stress of the drill hole comprises the device for measuring the omnidirectional stress of the