基于突变理论的深部煤柱稳定性
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TU822

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国家自然科学基金(52278324)


Research on Stability of Deep Coal Pillar Based on Catastrophe Theory
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    摘要:

    本文针对神华新街矿区盾构工法建设煤矿长距离斜井,研究了深部条件下保护煤柱的自身稳定性。研究发现,根据煤柱不同区域受力特征的差异性,可将其分成弹性核区和边缘塑性区,在此基础上建立了煤柱尖点突变模型,并经推导得到了煤柱的失稳判别公式。通过数值计算(UDEC)分析了深部盾构斜井保护煤柱在开采过程中的稳定状态。试验结果表明,随着煤层的开采能量缓慢释放,120m煤柱自边缘向内部逐渐屈服,并在单侧出现4.5m的塑性区。经公式判别,该工程中保护煤柱可以在深部开采条件下保持稳定,研究结果对相似工程中合理煤柱的留设提供了借鉴。

    Abstract:

    To study the self-stability of coal pillars under deep conditions, this article focuses on the engineering practice of constructing long-distance inclined tunnel in coal mines using shield tunneling method in Shenhua Xinjie mining area. The study found that the coal pillar can be divided into elastic core zone and marginal plastic zone due to the difference of stress characteristics in different regions. On this basis, a cusp-catastrophe model of coal pillar was deduced, and the formula for determining the instability of the coal pillar has been derived, then the stable state of deep coal pillars during mining was analyzed through numerical calculation (UDEC). The experimental results indicate that as the mining energy of the coal layer slowly releases, the 120m coal pillar gradually yields from the edge to the interior, and a 4.5m plastic zone appears on one side. After calculation, the coal pillar in this project can maintain stability under deep mining conditions, and the research results provide a reference for the reasonable retention of coal pillars in similar projects.

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亓轶,朱向阳,王承亮,等. 基于突变理论的深部煤柱稳定性[J]. 科学技术与工程, 2024, 24(15): 6234-6240.
Qi Yi, Zhu Xiangyang, Wang Chengliang, et al. Research on Stability of Deep Coal Pillar Based on Catastrophe Theory[J]. Science Technology and Engineering,2024,24(15):6234-6240.

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  • 收稿日期:2023-07-03
  • 最后修改日期:2024-03-16
  • 录用日期:2023-10-24
  • 在线发布日期: 2024-06-04
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