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Every gigantic Coal and Gas Outburst begins as a tiny, localized coal failure. This point of failure leads to a rupture of the coal seam, resulting in a violent ejection of enormous amounts of gas and pulverized coal. Whether the size of an outburst is predictable and whether a large-scale outburst requires unique conditions different from smaller events are fundamental questions associated with the potential for disaster probabilistic forecasting. In this study, we conducted a series of outburst simulations using carbon dioxide (CO2) and He and recorded acoustic signals in the frequency band 0.5–50 Hz during each outburst. We established that the cross-correlation coefficients of initial waveforms between Different-Sized Outbursts are generally high, which provides evidence for identical onsets of large and small events. Therefore, we focused on the self-similar properties of rupture growth and developed a viable model to explain the outburst mechanism. In our model, every outburst ....

Gas Outburst , Different Sized Outbursts , Acoustic Waveform , Gas Desorption , Utburst Simulation , Ropagation Mechanism ,