Application of acoustic methods for rock mass hydrotreatment parameter control and efficiency assessment


A.V. Shadrin, Yu.A. Diyuk, A.S. Teleguz

The article discusses the application of acoustic methods of routine monitoring of coal-rock mass hazardous in terms of gas and coal dust outbursts and rock bumps, with three compulsory procedures: hazard risk forecast, application of hazard risk management method if the hazard is predicted by the forecast, and monitoring of the efficiency of the implemented method. Seismic scanning, acoustic emission (AE) and spectral-acoustic methods are analyzed. The authors prove that seismic scanning method is helpful for the detection of faults formed ahead of a driven working – one of the significant factors of outburst hazard. AE method can be reasonably used for the monitoring of poorly caving roof and/or coal seam hydrotreatment, which is accompanied by the development (growth) of fractures emitting acoustic emission pulses. Spectral-acoustic method is efficient for the monitoring of the face area stress state before and after implementation of a gas and dust outburst and rock bump hazard management method (for instance, hydrotreatment efficiency monitoring). The research was funded through a grant from the Russian Science Foundation (Project No. 17-17-01143)

Key words: coal-rock mass, gas and coal dust outbursts and rock bumps, hazard forecast, seismic scanning, hydrotreatment, acoustic emission, spectral-acoustic method, efficiency monitoring

Mining Industry Journal №2 (138) 2018, p.79