The influence of ascending mining on the movement character of overlying coal seam in coal seams group
Abstract：The movement and damage character and pressure relief effect on coal seam gas of the over strata were analyzed in ascending mining under different first mining thickness of the under seam in the short-distance coal seams group of Zhaogezhuang Coal Mine through theoretical calculations,field practice and UDEC numerical simulation.With existing mining conditions,the results show that first mining 4 m of the top layer of No.12 coal seam,then mining the No.9 coal,finally using top-caving technology mining the under layer of No.12 coal seam is a scientific and reasonable exploitation method.
Keywords：coal seams groupascending miningmovement of coal seamtop-caving method
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)