The layout temperature at each post in the coal mine is measured every 3 to 5 hours. Coal mine underground air temperature roving inspection system: The temperature inspection is the same as the gas inspection, and a 38-year system is implemented. Each shift is responsible for a gas inspector, who conducts at least 2 inspections. The time interval between two inspections is not less than 3 hours and must not be greater than 5 Hour.