VARIATION LAW OF COAL PERMEABILITY UNDER CYCLIC LOADING AND UNLOADING
作者: Jingna Guo Jiangfeng Liu Qiang Li Xu Chen Zhanqing Chen Bingxiang Huang Shuliang Chen
刊名: Thermal Science, 2019, Vol.23 (3A/2019), pp.1487-1494
来源数据库: Society for Thermal Engineers of Serbia
DOI: https://doi.org/10.2298/TSCI180907215G
关键词: Coal permeabilityCoal seamLoading pathPlastic flow
原始语种摘要: In the excavation process, the coal pillar will undergo shear failure due to repeated loading and unloading from mining stress. Meanwhile, plastic flow will occur after shear failure. The permeability change of the coal pillar under plastic flow is closely related to the loading path. Through a permeability test of the coal sample after shear yielding under cyclic loading and unloading conditions, the variation law of permeability of a coal seam under plastic flow was obtained. The results show that the permeability of the coal sample increases as the axial strain decreases during the unloading phase. During the loading phase, as the axial strain increases, the permeability of the coal sample decreases. Scanning electron microscope tests show that the crack opening is larger at lower...
全文获取路径: PDF下载  塞尔维亚热力工程师协会  (合作)
分享到:

×
关键词翻译
关键词翻译
  • unloading 卸荷
  • plastic 可塑性的
  • pillar 
  • permeability 磁导率
  • strain 应变
  • variation 变异
  • shear 切变
  • toward 
  • microscope 显微镜
  • electron 电子