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首页> 外文期刊>Advances in civil engineering >Gas Distribution Law for the Fully Mechanized Top-Coal Caving Face in a Gassy Extra-Thick Coal Seam
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Gas Distribution Law for the Fully Mechanized Top-Coal Caving Face in a Gassy Extra-Thick Coal Seam

机译：瓦斯特厚煤层综放面瓦斯分布规律。

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摘要

Mine gas overflow is a serious threat to the safe and efficient longwall mining of gassy coal seams. Based on the field mining conditions and gas extraction of the fully mechanized top-coal caving face of a gassy coal mine, the space volume fraction distribution and emission (extraction rate) of gas in the face were tested by an arrangement of measuring points in the stereo grid., The isograms of gas volume fraction distribution for each measurement section and air direction in the face are drawn., The research shows that each measurement section gas volume fraction distribution is presented for an asymmetric concave curve along the vertical direction of the coal wall in the air-inlet side and the air-return side of the face; on the working face air-return side, the determination of gas volume fraction distribution of the section appears as falling straight line along the vertical direction of the coal wall. Before the first weighting, the absolute quantity of gas emission in the working face increased with the advancing of the working face, reached the maximum at the time of the first weighting, and then remained stable.
机译：矿井瓦斯涌出严重威胁着瓦斯煤层的安全，高效的长壁开采。根据瓦斯煤矿综放面的野外开采条件和瓦斯抽放情况，通过布置测量点进行了工作面瓦斯的空间体积分数分布和释放（抽采率）测试。立体网格。，绘制了每个测量段的瓦斯体积分数分布等值线和工作面中的空气方向等轴测图。，研究表明，沿着煤的垂直方向的不对称凹曲线呈现了每个测量段的瓦斯体积分数分布壁面在进气口侧和回风侧；在工作面回风侧，该部分的瓦斯体积分数分布的确定显示为沿煤壁垂直方向的下降直线。在第一次加权之前，工作面中气体的绝对排放量随工作面的前进而增加，在第一次加权时达到最大值，然后保持稳定。

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  • 来源
    《Advances in civil engineering》 |2018年第10期|3563728.1-3563728.8|共8页
  • 作者

    Wang Wenlin; Wang Fangtian; Zhao Bin; Li Gang;

  • 作者单位

    Shaanxi Huabin Coal Ltd, Share Ltd, Xianyang 713500, Shaanxi, Peoples R China;

    Key Lab Mine Geol Hazards Mech & Control, Xian 710054, Shaanxi, Peoples R China|China Univ Min & Technol, Minist Educ China, Sch Mines, Key Lab Deep Coal Resource Min, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Minist Educ China, Sch Mines, Key Lab Deep Coal Resource Min, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, Minist Educ China, Sch Mines, Key Lab Deep Coal Resource Min, Xuzhou 221116, Jiangsu, Peoples R China;

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