黄土沟谷区浅埋煤层矿压特征数值模拟及支架选型研究

Numerical simulation of mine pressure characteristics and support selection in shallow coal seams in loess gully terrain

  • 摘要:
    目的 以朱家峁煤矿为研究对象,针对黄土沟谷区浅埋煤层开采中的矿压特征与支架选型问题,进行了数值模拟研究。研究的目的是分析朱家峁煤矿沟谷区域浅埋煤层的矿压变化规律,并探讨不同支架类型在该地质条件下的适用性,为矿井的安全高效开采提供理论依据。
    方法 通过使用FLAC3D有限元软件建立了数值模型,模拟了工作面不同推进距离下煤岩体的应力分布,并分析了矿压对支架选型的影响。
    结果 研究结果表明,随着工作面的推进,煤壁前方的应力增高区不断扩展,采空区上部的拉应力逐步影响至地表,矿压在沟谷地形下表现出较大的复杂性。基于这些矿压特征,建议采用两柱掩护式液压支架,该支架在受力均衡、结构简单和适应性强等方面具有明显优势,能够有效应对矿压问题,保障工作面安全开采。
    结论 研究为类似矿井的支架选型与矿压管理提供了技术参考,并为朱家峁煤矿及其他沟谷区煤矿的安全开采提供了重要支持。

     

    Abstract: This study takes Zhujiamao Coal Mine as the research object, and conducts a numerical simulation investigation into the mine pressure characteristics and support selection issues in shallow coal seam mining under loess gully terrain. The aim is to analyze the variation patterns of mine pressure in the gully area of Zhujiamao Coal Mine and to explore the applicability of different support types under these geological conditions, thereby providing a theoretical basis for safe and efficient mining. A numerical model was established using FLAC3D finite element software to simulate the stress distribution of the coal and rock mass at different advance distances of the working face, and the influence of mine pressure on support selection was analyzed. The results show that as the working face advances, the stress concentration zone in front of the coal wall continuously expands, and the tensile stress above the goaf gradually affects the ground surface, with the mine pressure exhibiting considerable complexity under gully topography. Based on these mine pressure characteristics, this paper recommends the adoption of a two-leg shield hydraulic support. This support type offers distinct advantages in terms of balanced loading, simple structure, and strong adaptability, enabling it to effectively address mine pressure issues and ensure safe mining at the working face. The research provides a technical reference for support selection and mine pressure management in similar mines.

     

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