Study on Optimal Roadways Layout of Contiguous Seams by Simultaneous Mining
ZHANG Chun-lei
ZHANG Yong
Abstract：In order to determine No. 3 and No. 4 coal seam roadway layout of one mine during simultaneous mining,combining with the geo-logical condition of coal seam,firstly,by the theoretical analysis,the roadways of the mining face mined simultaneously were arranged out-ward staggered.Then the numerical simulation FLAC3D was adopted to optimize the distance between roadways of contiguous seams by min-ing simultaneously,and the rational separation distance of roadways was 20 m. Finally,through the coal mine practice,the roof-to-floor convergence was 150 mm,and the convergence of two side walls was 120 mm in the lower roadway of No.3409 working face.The influence scope was limited in the range of 60 m in front of working face.The layout of roadways in contiguous seams by simultaneous mining was ra-tional and the deformation of the surrounding rock of roadways was controlled effectively.
Keywords：contiguous seamsmining simultaneouslyrational gateway separation distanceoptimal layout
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 53-56,78 )