Support design of close-distanced coal seam's asymmetric deformed roadway
During the tunneling of the coal seam roadway,due to the close coal seam mining,the roof was broken and the surrounding rock of the two sides was severely deformed during the initial excavation of the 23306 lower entering gateway in Xiayukou Coal Mine.Aiming at a series of problems,such as roadway surrounding rock deformation and roadway support dif-ficulties and using theoretical analysis and on site monitoring,we explore the causes of the roof breakage during the excava-tion period by optimizing the support scheme.The results show that the improved method of anchor net cable+U-shaped shed support can effectively improve the deformation of the roadway.The further observation of the roadway surrounding rock deformation proves that when the roadway roof is easy to break,at the technical and economic level,the choice of reasonable support parameters and of anchor net cable+scaffolding support can ensure the safe and efficient mining.
roadway surrounding rock deformationanchor net supporton site monitoringsupport optimization
国家科技期刊平台
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