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<p>In rockburst-prone coal mines, high-strength hard roof intensifies mine pressure and dynamic impacts. Conventional underground pressure relief methods such as large-diameter boreholes and coal seam blasting provide only localized weakening, failing to achieve large-scale modifications of hard rock at greater heights. Using theoretical analysis and numerical simulations of staged fracturing in horizontal wells, this study investigated the optimal fracturing parameters for hard rock in a rockburst-prone coal mine in Binchang mining area. With a fracturing height of 20 m and segment length of 50 m, fractured rock can effectively absorb impact energy and mitigate rockburst risks, effectively maintaining the stability of underground and subsurface engineering structures.</p>

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Research on Pressure Relief Parameters of Staged Fracturing Technology in Horizontal Wells for Impact Ground Pressure in Mines

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Kun Zhang,
  • Chiheng Cai,
  • Jianxi Ren,
  • Mengchen Yun,
  • Biao Jiao,
  • Huadong Yang,
  • Chenyang Zhang,
  • Pengfei Zhang,
  • Zheng Liu

摘要

In rockburst-prone coal mines, high-strength hard roof intensifies mine pressure and dynamic impacts. Conventional underground pressure relief methods such as large-diameter boreholes and coal seam blasting provide only localized weakening, failing to achieve large-scale modifications of hard rock at greater heights. Using theoretical analysis and numerical simulations of staged fracturing in horizontal wells, this study investigated the optimal fracturing parameters for hard rock in a rockburst-prone coal mine in Binchang mining area. With a fracturing height of 20 m and segment length of 50 m, fractured rock can effectively absorb impact energy and mitigate rockburst risks, effectively maintaining the stability of underground and subsurface engineering structures.