Study Of Mining Gateroad Layout On The Extremely Close Coal Seam Group In Chenghe Mining Area

The extremely close coal seam mining group under coal mining face gateroad layout isalways one of the difficult technical problems of safety and high efficiency mining，therefore，in-depth understanding of the extremely close coal seam mining group working face gateroadlayout，high efficient implementation of the work safety is important.In this paper，using the similar material simulation experiment，computer simulationand theoretical analysis，numerical simulation，in order to Chenghe Bailiang XuSheng coalmine as the research object，based on the analysis of very short distance coal seam mininggroup overburden failure law of abutment pressure， transmission and distributioncharacteristics,on the basis of reasonable arrangement of upper and lower coal seam workingface gateroad layout has carried on the system and further research.Based on similarity simulation experiment and numerical simulation on FLAC3D,acomprehensive analysis of upper and lower coal seam working face gateroad layout, externalfault，overlapping，wrong three different gateroad layout, the deformation characteristics ofgateroad surrounding rock pressure and supporting change. Physical simulation experimentand numerical simulation study shows that, in the wrong type and overlapping type ofgateroad layout, the lower part of No.5coal seam in No.4coal seam of coal pillar upper leftin the stress concentration zone and the shear zone, deformation of surrounding rock is large,difficult to maintain; wrong arrangement, in mining gateroad side goaf stress decreasing zone,is conducive to the maintenance of gateroad. Finally,combined with the specific engineeringexample Bailiang XuSheng coal mine, and gives a reasonable scheme of Gateroad No.5coalseam and its related parameters. The research results of the similar mine mining also havecertain reference significance.