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  • 标题:Research of mechanical characteristics and roadway support in two-soft and one-hard coal seam
  • 作者:Hai Tao Wang ; Cheng Tong ; Ya Jun Wang
  • 期刊名称:IOP Conference Series: Earth and Environmental Science
  • 印刷版ISSN:1755-1307
  • 电子版ISSN:1755-1315
  • 出版年度:2018
  • 卷号:186
  • 期号:5
  • 页码:012032
  • DOI:10.1088/1755-1315/186/5/012032
  • 语种:English
  • 出版社:IOP Publishing
  • 摘要:This paper is concerned with a solution to difficulties, such as a closer convergence between the ribs, a greater floor deformation and a more challenging roadway support, as occurs in fully mechanized panel 21203 return airway of Yunmei Number one coal mine. The research builded on the data derived from field measurement and was combined with the law underlying the movement of overlying strata, caving characteristics, and the law governing the distribution of initial support pressure, as is typical of the coal seam, known as "two-soft and one-hard" in the mine. The study features a horse-shoe arch U tape steel support form developed from the currently-used roadway support form-a support form of rectangular cross section comprised of bolt, anchor cable, anchor net, and the FLAC3D numerical simulation based on experiment parameters behind uniaxial compression of surrounding rocks. The results demonstrate that the improved support form may enable an effective change in the roadway stress behavior. The field application shows that the horse-shoe U-type steel support form may provide a more effective control of the extent to which there occur the convergence between the two ribs and floor heave; and a better solution to a greater deformation occurring in return airways.
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