Scholarlink

<p>As mining operations progressively extend to greater depths annually, the water hazard associated with the Ordovician limestone floor has emerged as a critical threat to the safe extraction of coal within the lower coal group of North China-type coalfields. The combined effects of high confined water pressure and mining-induced stress activate weak zones within concealed geological structures, transforming them into conduits for water ingress and leading to frequent water inrush incidents. Confined water infiltrates structurally vulnerable areas, triggering floor water inrush events that result in substantial losses. This study commences with the establishment of a macroscopic geological model, followed by the development of a mechanical model for water inrush occurring in collapsed columns and faults, which incorporates the coupled influences of mining-induced stress and confined water pressure. Theoretical analysis indicates that, under uniform mining conditions, a consistent relationship exists between the short semi-axis length (a, in meters) of the collapsed column and the fault opening width (δ, in meters). Notably, it is inferred that concealed collapsed columns are more susceptible to water inrush than concealed faults, thereby providing a theoretical foundation for an empirical observation that previously lacked validation. The water inrush mechanics model elucidates the intrinsic relationships among the principal factors affecting water inrush under consistent mining conditions. Specifically, the relative critical conditions for water inrush in collapsed columns—characterized by varying overburden thickness parameters and the ratio of short to long axes (a/b)—exhibit a monotonically decreasing trend. Furthermore, the relative critical value for fault water inrush decreases monotonically with increasing fault dip angle and is inversely proportional to both the fault opening width and the fault extension length. These findings contribute to the theoretical framework for the prevention and control of mine water hazards, thereby providing a robust basis for safe mining practices and the mitigation of water-related risks in mining operations<sup>1</sup>.</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 the mechanism and primary controlling factors of collapse column and fault water inrush

  • 期刊论文

  • 发表日期：

    2026年2月14日

查看全文
  • Xiao-Ya Chuai,
  • Jin-Song Shen,
  • Yan-Xiao He,
  • Xiao-Yu Chuai

摘要

As mining operations progressively extend to greater depths annually, the water hazard associated with the Ordovician limestone floor has emerged as a critical threat to the safe extraction of coal within the lower coal group of North China-type coalfields. The combined effects of high confined water pressure and mining-induced stress activate weak zones within concealed geological structures, transforming them into conduits for water ingress and leading to frequent water inrush incidents. Confined water infiltrates structurally vulnerable areas, triggering floor water inrush events that result in substantial losses. This study commences with the establishment of a macroscopic geological model, followed by the development of a mechanical model for water inrush occurring in collapsed columns and faults, which incorporates the coupled influences of mining-induced stress and confined water pressure. Theoretical analysis indicates that, under uniform mining conditions, a consistent relationship exists between the short semi-axis length (a, in meters) of the collapsed column and the fault opening width (δ, in meters). Notably, it is inferred that concealed collapsed columns are more susceptible to water inrush than concealed faults, thereby providing a theoretical foundation for an empirical observation that previously lacked validation. The water inrush mechanics model elucidates the intrinsic relationships among the principal factors affecting water inrush under consistent mining conditions. Specifically, the relative critical conditions for water inrush in collapsed columns—characterized by varying overburden thickness parameters and the ratio of short to long axes (a/b)—exhibit a monotonically decreasing trend. Furthermore, the relative critical value for fault water inrush decreases monotonically with increasing fault dip angle and is inversely proportional to both the fault opening width and the fault extension length. These findings contribute to the theoretical framework for the prevention and control of mine water hazards, thereby providing a robust basis for safe mining practices and the mitigation of water-related risks in mining operations1.