Interlaminar deformations during top coal caving

This study focuses on determination and analysis of the parameters and features of manmade acoustic signals in top coal caving with a view to predicting hazardous dynamic events. The prediction results of top coal caving based on the analytical calculations using the data on the structure and strength characteristics of rocks above coal seams Polenovsky and Boldyrevsky in Kirov mine and seam 52 in Yalevsky mine are presented. The research aim was processing and analysis of information provided by the automation system of acoustic rock mass control (SARMC) and the hazardous dynamic event prediction for the purpose of stress–strain monitoring of rock mass. Dynamics of weakened interfaces of layers and the face rock mass condition were assessed using the manmade acoustic signal parameters. The features of the manmade acoustic signals in the layered medium are described, and the influence of the face advance on variability of the signal parameters is discussed. Using the analysis and interpretation data, the detailed patterns of relative stresses in longwall sites of the above-listed mines during top coal caving are obtained.

Aksenov Z. V. Interlaminar deformations during top coal caving. MIAB. Mining Inf. Anal. Bull. 2021;(9):23-35. [In Russ]. DOI: 10.25018/0236_1493_2021_9_0_23.

Z.V. Aksenov, Graduate Student, e-mail: aksenov.zakhar@yandex.ru, Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

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