Rock fracture extension detection system and method based on thermal imaging and image recognition

The invention provides a rock fracture extension detection system and method based on thermal imaging and image recognition, and relates to the technical field of rock mechanical tests. The system comprises a uniaxial loading device, a rock test piece, a heat source, a thermal imager, a support and a computer, the rock test piece is arranged on a loading base of the uniaxial loading device, the support and the rock test piece are oppositely arranged, a plurality of two-dimensional slide rails are arranged on the support, and the thermal imager and the heat source are mounted on the two-dimensional slide rails; under the condition that the thermal imager is not in contact with the rock test piece, a thermal imaging image of the rock test piece in a stress loading state is obtained, the thermal imaging image is analyzed through a computer, the fracture development situation of the rock test piece in the stress loading state is extracted, and a fracture expansion three-dimensional diagramand fracture data at all