Influence of high mining velocity on periodic weighting during fully-mechanized mining in a shallow seam
Abstract：The Huojitu coal mine is used to develop measurements and theoretical analysis relat- ed to periodic weighting during fully-mechanized mining at high velocities in a shallow seam. High mining velocities are shown to increase the continuous length roof weight although the support and dynamic load coefficients are only modestly affected. The time effect on damage deformation in the surrounding rock is the source of roof weighting dependence on mining ve- locity. High velocities exceed the rate of roof collapse, which requires more rotating movement to realize roof stability, consequently increasing the required continuous length weight. The in- fluence of mining velocity on periodic weighting The Shendong practice of removing support the entrance face is discussed. This serves guidance working face located in the Huojitu mine. requirements are used to model mining yields. end of fully-mechanized mining with a double for safe support removal in the number 21306
Keywords：shallow seammining velocitycontinuous length of roof weightingkey stratum
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 349-354 )