Acoustic emission early-warning method for underground coal unstability dynamic disasters

The invention discloses an acoustic emission early-warning method for underground coal unstability dynamic disasters. The method comprises the following steps that first, monitored object coal is sampled, and the sample is processed to be a standard mechanical test piece; second, a compression fracture mechanical test is carried out on the standard mechanical test piece, and the fracture type of the test piece is determined; third, the stress condition of the monitored coal is analyzed, and the fracture type of the monitored coal is determined according to the fracture type of the standard mechanical test piece; fourth, an acoustic emission instrument is used for monitoring the coal, and collecting acoustic emission signals; fifth, according to the fracture type of the monitored coal and the acoustic emission signals, distinguishing of coal stability is carried out in a classified mode. The early-warning method of the coal unstability dynamic disasters solves the scientific problem of acoustic emission omen o