Crack detection device for fractured rock mass of hot dry rock

The utility model discloses a hot dry rock fractured rock mass crack detection device, and belongs to the technical field of rock mass crack detection. The utility model discloses a crack detection device for a fractured rock mass of hot dry rock. When the detection device is used for rock mass crack detection; opening motor, driving wheel to rotate, the driven wheel rotates under the transmissionaction of the transmission belt; further, the bevel gear rotates; dRIVING ROTATION OF A DRIVING GEAR, rotation of the driving gear enables a threaded rod meshed with the inner side of the chain to move left and right through the meshing connection effect of the chain. The lower end of the threaded rod is fixedly connected with the ultrasonic probe; therefore, the ultrasonic probe moves left and right, the position of the rock mass crack can be determined through the left and right movement of the ultrasonic probe, then relevant data of the rock mass crack can be measured more accurately, a worker can master relevant