Study on Synchronous Response Law of Acoustic and Electrical Signals of Outburst Coal Rock under Load and Fracture

A multisignal nanosecond synchronous acquisition system to measure acoustic emission (AE) and electromagnetic radiation (EMR) generated during the process of loading failure coal rock samples is established. The correlation between energy AE EMR signals stress outburst coal-rock was studied, characteristics fracturing were analyzed. results show that (1) before samples, fluctuation largest, with same rising falling trend, intensity not strictly positively correlated, phenomenon low when high; (2) deviation degree frequency exhibit a good response fracturing. drop stronger than AE, signal richer signal. it feasible develop combined early warning technology improve forecasting accuracy gas outbursts.