基于裂隙发育规律的多重采空区危险范围研究

    谷保泽,李明星,雷晓荣,邱少杰,赵乾坤

    谷保泽,李明星,雷晓荣,邱少杰,赵乾坤. 基于裂隙发育规律的多重采空区危险范围研究[J]. 煤矿安全, 2023, 54(8): 58-64.
    引用本文: 谷保泽,李明星,雷晓荣,邱少杰,赵乾坤. 基于裂隙发育规律的多重采空区危险范围研究[J]. 煤矿安全, 2023, 54(8): 58-64.
    GU Baoze. Division method of coal spontaneous combustion zone in multi-layer goafs based on fracture development law[J]. Safety in Coal Mines, 2023, 54(8): 58-64.
    Citation: GU Baoze. Division method of coal spontaneous combustion zone in multi-layer goafs based on fracture development law[J]. Safety in Coal Mines, 2023, 54(8): 58-64.

    基于裂隙发育规律的多重采空区危险范围研究

    Division method of coal spontaneous combustion zone in multi-layer goafs based on fracture development law

    • 摘要: 为准确划分浅埋深煤层群多重采空区煤自燃危险范围,从而采取有效防治措施,基于多孔介质渗流方程和氧气体积分数平衡方程,利用颗粒流离散元软件PFC建立数学模型,进行重复开采影响下裂隙通道发育规律研究。结果表明:采空区内侧20 m区域内,裂隙数量占比78%;采空区上方大孔隙率区域沿回采方向持续移动,细长特征得以保持,回采线、采空区后方及上方孔隙率较大。根据计算结果和工作面回采程序,1203工作面采空区危险范围划分为严重漏风危险区、一般漏风危险区、弱漏风危险区和难漏风危险区。
      Abstract: In order to accurately divide the risk range of coal spontaneous combustion in multiple goafs of shallow buried deep coal seam group and take effective prevention and control measures, based on the porous medium seepage equation and oxygen volume fraction equilibrium equation, the mathematical model is established by using particle flow discrete element software PFC, and the development law of fracture channel under the influence of repeated mining is studied. The results show that 78 % of the floor cracks are distributed in the range of 20 m of the boundary of mined-out area. The porosity distribution in the upper part of the mining space continues to expand with the advance of the working face, and maintains a slender shape. The areas with large porosity are still distributed above, behind and near the working face. According to the calculation results and the mining process, the danger range of the goaf area of the 1203 working surface is divided into serious air leakage danger area, general air leakage danger area, weak air leakage danger area and difficult air leakage danger area.
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    出版历程
    • 网络出版日期:  2023-09-04
    • 刊出日期:  2023-09-04

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