刘维福, 丁序海, 周 光. 基于CT成像的煤岩孔裂隙结构重建及渗流模拟研究[J]. 煤矿安全, 2021, 52(2): 23-27.
    引用本文: 刘维福, 丁序海, 周 光. 基于CT成像的煤岩孔裂隙结构重建及渗流模拟研究[J]. 煤矿安全, 2021, 52(2): 23-27.
    LIU Weifu, DING Xuhai, ZHOU Guang. Reconstruction and seepage simulation of coal and rock pore fracture structure based on CT imaging[J]. Safety in Coal Mines, 2021, 52(2): 23-27.
    Citation: LIU Weifu, DING Xuhai, ZHOU Guang. Reconstruction and seepage simulation of coal and rock pore fracture structure based on CT imaging[J]. Safety in Coal Mines, 2021, 52(2): 23-27.

    基于CT成像的煤岩孔裂隙结构重建及渗流模拟研究

    Reconstruction and seepage simulation of coal and rock pore fracture structure based on CT imaging

    • 摘要: 为了探索煤层压力注水在不同渗透率裂隙条件下的渗流特性,采用CT成像技术对煤样扫描,获得原始图像,利用MATLAB软件中值滤波函数对其噪声点进行滤除,获得二值化孔隙骨架图像,最后采用COMSOL数值分析软件中的插值函数重构煤体二维模型,建立煤体渗流过程的液体流动模型,数值模拟分析压力水的渗流演化过程。研究结果表明:利用MATLAB分析软件处理CT扫描图像,可准确的描述煤岩的孔隙结构;经过COMSOL插值函数对煤的二维模型做出精细表征;水在煤体中流动主要受孔隙结构的影响,在主裂隙水流动衰减速度很小,而在煤基质和次裂隙夹杂区域部分流动,在基质部分基本不流动。

       

      Abstract: In order to explore the seepage characteristics of coal seam pressure water injection under different permeability and fracture conditions, CT scanning technology was used to scan coal samples and obtain the original image. The noise points are filtered by using the median filter function of MATLAB software, and then the original binary image is obtained. Finally, the two-dimensional model of coal body is reconstructed by using the interpolation function in COMSOL numerical analysis software, and the fluid-solid coupling model of coal body seepage process is established, and the seepage evolution process of pressure water is analyzed by numerical simulation. The results show that the pore structure of coal can be accurately described by processing CT scanning images with MATLAB analysis software; the two-dimensional model of coal can be finely characterized by COMSOL interpolation function; the flow of water in coal is mainly affected by pore structure, and the flow attenuation rate of main fissure water is very small, while in the coal matrix and sub-fissure inclusion area, the flow is basically not in the matrix part flow.

       

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