To further strengthen production safety of coal mining enterprises, based on the gas inspection personnel in accordance with the inspection chart to perform gas inspection process, the existence of "residual" empty class, Shenzhou Mining Industry Company introduced fingerprint inspection system, using the fingerprint identification, through fingerprints and binding equipment, inspection points and address card binding, the uniqueness of the authenticity of inspection personnel, inspection data were ensured, which effectively prevented the inspection personnel "leak" empty class, etc., made the gas "class three check" system into effect.