Real-time diagnosis method of prominent coal and gas

A diagnosis method of this invention extracts the daily concentration average value, the daily movement average value, the highest concentration value and the power value i from the gas concentration data; k is set as the daily concentration average value/ daily movement average value; n is set as the highest concentration value/daily movement average value. The values of k, n and i are judged and are quantified to obtain sub-indexes of M1, M2 and M3; the comprehensive calculation is performed to M1, M2 and M3; the weights of M1, M2 and M3 are set as C1, C2 and C3, and the comprehensive index x is set, wherein M is equal to C1M1+C2M2+C3M3; when M is less than 0.5, then it is in the normal state; when M is not smaller than 0.5 and less than 0.8, then it is in the threatening state; when M is not smaller than 0.8 and less than 1.0, then it is in the dangerous state. This invention is combined with the mine monitoring system, synthesizes the change character of the gas concentration of three factors in the wind