Geomechanical Modeling to Evaluate Technology Parameters for Coal Mining in the Interaction Zone of Longwall Face and Gate Roadway
V. M. Seryakov1, S. V. Rib2, V. V. Basov2, V. N. Fryanov2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
2Siberain State Industrial University, Novokuznetsk, 654007 Russia
Keywords: очистной забой, угольные шахты, механизированная крепь, напряжения, смещения, горная выработка, массив горных пород, остаточная прочность, передовая выработка, породный прослоек, Longwall face, coal mines, powered roof support, stresses, displacements, roadway, rock mass, residual strength, gate roadway, dirt bed
Abstract
The results of numerical modeling to evaluate geomechanical behavior of rocks in the vicinity of a fully mechanized longwall face and a gate roadway during gradual narrowing of a coal pillar between them are presented. Variants of longwall face passing of diagonal cut-through are discussed for coal seams of complex structure and various thickness. The regularities of redistribution of stresses, strains, and residual strengths of coal and rocks under variation in coal seam thickness, pillar width and location of dirty bed are determined. The recommendations on the technology for mining coal pillars as their width is decreased and for stability of gate roadways are substantiated to ensure trouble-free operation of fully mechanized longwall faces.
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