DOI: 10.11799/ce201606021
Characteristics of roof weighting interval in unstable coal seam during fully mechanized top coal caving
ZHANG Feng-yan
Abstract：To analyze the influence of coal seam thickness and shape on weighting interval, beam-type mechanical model is applied to analyze the first and periodic weighting interval of coal seam. The field periodic weighting condition and the variation of seam thickness and shape is monitored in J7401 working face of HeLin mine. The theoretical results and the measurement data are compared, combining with the coal seam distribution graph and the weighting characteristics graph, the result shows that, when the coal seam thickness is smaller the periodic weighting step is relatively higher. And the concave shape of coal seam may lessen the periodic weighting step, while the convex shape may do the opposite.
Keywords：unstable coal seamcoal seam thicknesscoal seam shaperegularity of roof weightingweighting interval
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 68-70 )