Analytical device and analytical method for simulating coal gas change during coal cutting of coal cutter

The invention discloses an analytical device and analytical method for simulating the coal gas change during coal cutting of a coal cutter. The analytical device is composed of an air intake system, a crushing system, a temperature control system, an air extraction system and an analysis system. The method comprises the steps of: A. making unbroken coal into a lump coal sample with a volume larger than 20cm*20cm*10cm; B. placing the lump coal samples in a crushing chamber, controlling the air quantity by the air intake system, at the same time letting the temperature control system control the temperature at 25-800DEG C through a heating resistance wire, and then starting a motor to drive a pick to cut the coal at a rotation speed of 20-40r/min; and C. extracting the gas in the crushing system every other 20-30s by the air extraction system, and transporting the extracted gas to the analysis system to conduct gas component analysis. With the device and the method provided by the invention, the gas change situ