Gas monitoring device for treating coal mine goaf

The utility model belongs to the technical field of underground gas monitoring, and particularly relates to a gas monitoring device for coal mine goaf treatment, which comprises a plurality of detection components, each detection component comprises a detection box, a gas sensor, a controller and an alarm, the detection box is communicated with a gas inlet main pipe and a gas extraction pipe, and one end of the gas inlet main pipe far away from the detection box is closed; the gas inlet main pipe is communicated with a plurality of gas inlet branch pipes, electromagnetic valves used for controlling the gas inlet branch pipes to be connected and disconnected are installed on the gas inlet branch pipes, the electromagnetic valves, the gas sensor and the alarm are all electrically connected with the controller, and the gas sensor is installed in the detection box and transmits collected gas concentration data to the controller so as to control the alarm to work; one end of the exhaust pipe away from the detectio