JUSTIFICATION OF PROCESS SOLUTIONS ON MULTI-ENTRY PREPARATION AND MINING OF A SERIES OF VERY CLOSE COAL BEDS
A. A. Isachenko1, T. V. Petrova2
1JSC OUK Yuzhkuzbassugol, Branch of Erunakovskaya-VIII Mine, Novokuznetsk, Russia
2Siberian State Industrial University, Novokuznetsk, Russia
Keywords: Extraction pillar, entry, coal pillar, numerical modeling, underground workings, rock failure, stresses, strains
Abstract
Variants of the transition from two- to three-entry preparation of a series of very close shallow coal seams are considered, including methods for determining the minimum width of belt pillars based on the stability criteria of supported developing entries and prevention of geodynamic phenomena. A methodical approach is elaborated for the sequential transition from the production-tested two-entry preparation and mining of the extraction pillar to three-entry preparation.
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