FUNCTIONAL RELATIONSHIP ESTABLISHMENT BETWEEN THE OUTBURST HAZARD CRITERIA OF SPECTRAL-ACOUSTIC AND INSTRUMENTAL METHODS OF CURRENT OUTBURST FORECAST
Journal Title: Вестник научного центра по безопасности работ в угольной промышленности - Year 2018, Vol 0, Issue 4
Abstract
Instrumental and geophysical methods of coal seam outburst hazard current forecast are analyzed. It is shown that instrumental methods have scientifically based criteria for outburst hazard, however, they are characterized by periodicity of execution, long duration and the need to stop mining at the time of their execution. Geophysical methods are carried out continuously, do not interfere with mining, but do not have sufficient scientific substantiation. It has been established that the known versions of the most reliable geophysical spectral-acoustic method of the current forecast of outburst hazard implemented in AK-1 and SAKSM instruments have significant drawbacks, the main ones are not using the whole noise spectrum of the working mining equipment and the lack of a method for determining the outburst hazard indicator critical value. A variant of the spectral-acoustic method is proposed and justified, based on the dependence of the median amplitude-frequency characteristic of operating mining equipment (combine, shearer, drill rod, jackhammer) on the stress state of the face area, using almost the entire noise spectrum. A functional relationship has been established between the critical values of the outburst hazard indicators of the spectral-acoustic and instrumental outburst hazard forecasting methods through the initial gas emission rate and the drill fines output. On the basis of the established connection, a methodology was developed for determining the indicator critical value and the spectral-acoustic method outburst hazard criterion using the instrumental forecast method.
Authors and Affiliations
A. V. Shadrin, A. A. Kontrimas, Yu. A. Diiuk
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