Monitoring of Roof Subsidence Based On Manmade Acoustic Signal Properties
V. I. Shilov1, Z. V. Aksenov2
1MNTL RIVAS, Moscow, Russia
2National University of Science and Technology, Moscow, Russia
Keywords: Manmade acoustic signal, main roof subsidence, mining safety, acoustic control of rock mass condition, relative stress dynamics
Abstract
The manmade acoustic signal properties are determined for rock mass monitoring aimed to predict main roof subsidence in coal longwalls. The limit properties for the automatic problem algorithm are defined. The dynamics of the informative parameters of a manmade acoustic signal is demonstrated as a case-study of the main roof subsidence areas in longwalls in Yalevsky Mine, Kirov Mine and Komsomolets Mine. The parameter stability of the integral resonance frequency energy at different distances from a setup room lengthwise an extraction panel is studied in three longwalls in coal mines of SUEK-Kuzbass in order to find correlation between relative stresses and intensity of interlaminar strains. The proposed and proven prognostic parameter enables timing of main roof subsidence and evaluation of the process dynamics.
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