Scholarlink

<p>Taking a mine in Guizhou Province as the research background, a combination of similar simulation experiments and numerical simulation was used to analyse the spatial distribution of overburden collapse and the development of fissures during the mining process. The results indicate that: (1) During the mining of the upper coal seam, the overlying rock is not affected by faults, the ‘three zones’ are significantly developed, the collapse morphology exhibits a typical ‘trapezoidal’ structure, and the fractures undergo stages of formation, expansion, and closure; (2) The lower coal seam is affected by reverse faults, resulting in asymmetrical overburden collapse patterns and discontinuous fissure development. When mining across faults, periodic pressure is intense, and the stride length is significantly reduced, with severe rock fragmentation near the faults. (3) Under repeated mining activities, the displacement and subsidence of the lower coal seam are greater than those of the upper coal seam. By quantifying the spatio-temporal distribution of mining-induced fractures using fractal dimension, it is clear that their development and evolution follow a process of formation, development, and closure. The research results can provide a theoretical basis for the safe development of coal mines under similar geological conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on fracture development and failure characteristics of repeated mining overlying strata in multi-coal seams with faults

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月1日

查看全文
  • Baoyan Zhi,
  • Rui Guo,
  • Gang Guo,
  • Shusen Zhang,
  • Jiankun Yuan,
  • Canyu Lei,
  • Zuhao Xu

摘要

Taking a mine in Guizhou Province as the research background, a combination of similar simulation experiments and numerical simulation was used to analyse the spatial distribution of overburden collapse and the development of fissures during the mining process. The results indicate that: (1) During the mining of the upper coal seam, the overlying rock is not affected by faults, the ‘three zones’ are significantly developed, the collapse morphology exhibits a typical ‘trapezoidal’ structure, and the fractures undergo stages of formation, expansion, and closure; (2) The lower coal seam is affected by reverse faults, resulting in asymmetrical overburden collapse patterns and discontinuous fissure development. When mining across faults, periodic pressure is intense, and the stride length is significantly reduced, with severe rock fragmentation near the faults. (3) Under repeated mining activities, the displacement and subsidence of the lower coal seam are greater than those of the upper coal seam. By quantifying the spatio-temporal distribution of mining-induced fractures using fractal dimension, it is clear that their development and evolution follow a process of formation, development, and closure. The research results can provide a theoretical basis for the safe development of coal mines under similar geological conditions.