Influence of Close Distance Coal Seam Occurrence on Staggered Distance of Simultaneous Mining Face
XU Guoqing
Abstract：To solve the safety problem of a mine in Shanxi Province when the coal seam is mined at short distance under the staggered distance of a single working face, we applied the orthogonal analysis to study the influence of seam occurrence parame-ters on staggered distance of the simultaneous mining faces by means of FLAC3D numerical simulation. Results show that the oc-currence state of simultaneous mining seam has a large effect on the staggered distance, especially the thickness of upper seam. When seam occurrence is unstable, the staggered distance cannot remain unchanged when coal seams are mined simultaneously. Based on the research results, the dynamic adjustment method of staggered distance based on coal seam occurrence state is pro-posed, which achieves good mining and supporting effect and has major implications on mining under the similar condition.
Keywords：close distance seamsimultaneous mining facesseam occurrenceorthogonal experimentdynamic adjustment
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 67-71 )