Coal mine goaf directional inert gas injection fire preventing and extinguishing system

The utility model discloses a coal mine goaf directional inert injection fire preventing and extinguishing system which is characterized in that temperature sensors are sequentially arranged at intervals backwards from the position of a roadway working face, each temperature sensor is connected with a signal center device through a lead, a gas pipeline is laid in the roadway tunneling direction, and a plurality of gas outlet holes are formed in a gas injection floral tube in the length direction; the number of the gas injection floral tubes is consistent with that of the temperature sensors, all the gas injection floral tubes are vertically communicated with the gas pipeline and are in one-to-one correspondence with the positions of the temperature sensors, an intelligent valve is arranged between the gas pipeline and each gas injection floral tube, and the intelligent valves and the high-pressure gas pump are connected with the computer through control cables. And the computer is connected with the signal hu