Visual test system and test method for coal spontaneous combustion behavior

The invention belongs to the technical field of mine safety, and particularly provides a visual test system and test method for coal spontaneous combustion behaviors. The visual test system comprises an intelligent gas distribution system, a temperature control box, a transparent furnace tank, a schlieren instrument, a high-precision electronic scale, a sound wave acquisition and analysis system, a coal surface stress acquisition and analysis system, a vacuum pumping system, a temperature control system, a gas acquisition and analysis system and computer equipment. The visual test system for the coal spontaneous combustion behavior can simulate the spontaneous combustion process of a coal sample in different gas environments, records the sound wave state, the weight, the surface stress and the gas product data of coal reaction, is reasonable in overall structure and simple to operate, has high test precision, wide applicability and practicability, has popularization value, and is suitable for popularization a