蔡永乐, 杨小彬, 陶振翔, 李全中. 含瓦斯煤岩蠕变渗流耦合试验研究[J]. 煤矿安全, 2016, 47(12): 19-22.
    引用本文: 蔡永乐, 杨小彬, 陶振翔, 李全中. 含瓦斯煤岩蠕变渗流耦合试验研究[J]. 煤矿安全, 2016, 47(12): 19-22.
    CAI Yongle, YANG Xiaobin, TAO Zhenxiang, LI Quanzhong. Experimental Study on Creep Seepage Coupling of Coal and Rock Containing Gas[J]. Safety in Coal Mines, 2016, 47(12): 19-22.
    Citation: CAI Yongle, YANG Xiaobin, TAO Zhenxiang, LI Quanzhong. Experimental Study on Creep Seepage Coupling of Coal and Rock Containing Gas[J]. Safety in Coal Mines, 2016, 47(12): 19-22.

    含瓦斯煤岩蠕变渗流耦合试验研究

    Experimental Study on Creep Seepage Coupling of Coal and Rock Containing Gas

    • 摘要: 应用自行设计的CSCG-160型重力液压恒载蠕变渗流试验系统,进行了煤样蠕变渗流特性试验,研究煤体蠕变过程中变形和渗流特性,并将试验结果与数值模拟结果进行了对比分析。研究结果表明:煤岩蠕变特性明显,蠕变载荷较小时,煤岩呈现衰减蠕变,较高的蠕变载荷水平下煤岩具有典型的蠕变3阶段;煤岩试样的环向应变随轴向应变的增大而增大,体积应变随轴向应变的增加呈现先增大后减小的趋势;煤岩渗透率随时间变化的曲线与煤岩蠕变试验曲线的变化趋势一致,煤岩的渗透率随蠕变载荷水平的增加而增大;煤岩蠕变过程的渗透率随轴向应变的增大而增大,渗透率增加的速率也随着轴向应变的增大而增大。

       

      Abstract: Using self-designed CSCG-160 gravity type hydraulic dead load creep seepage system, we carry out the creep and seepage characteristic experiment of coal sample, and study deformation and seepage characteristics in coal creep process, and compare and analyze the experimental results and numerical simulation results. The results show that coal rock creep characteristics are obviously; when the creep load is small, the coal and rock shows attenuation creep, and coal and rock has three typical creep stages under high creep stress level; sample of coal and rock circumferential strain increases with the increase of axial strain, and volumetric strain shows a trend of first increase and then decrease with the increase of axial strain; the variation of coal and rock permeability with time is consistent with the change trend of coal rock creep test curve, and the permeability of coal rock increases with the increase of creep load level; the permeability of coal rock creep process increases with the increase of axial strain, and the rate of permeability increases with the increase of axial strain.

       

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