Basic tasks for improving spectral-acoustic forecasting of dynamic phenomena in coal mines

[摘要] A number of tasks for improving the spectral-acoustic method for forecasting dynamic phenomena and controlling stress condition in coalmines is considered. They are: considering the influence of a gas factor on the danger indicator, dependence of a relative pressure coefficient on the distance between the source and the receiver of the probing acoustic signal, correct selection of operating frequencies, the importance of developing the techniques for defining the critical value of the outburst danger index The influence of the rock mass stress condition ahead of the preliminary opening face on the relative pressure coefficient defined for installing the sound receiver in the wall of the opening behind the opening face is also justified in the article.

[发布机构] Institute of Coal of the Federal, Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, 10 Leningradsky Prospect, Kemerovo; 650065, Russia^1

[效力级别] 地球科学

[关键词] Acoustic method;Acoustic signals;Dynamic phenomena;Forecasting dynamics;Operating frequency;Pressure coefficients;Rock mass stress;Stress condition