不同冲煤量对有效抽采半径的影响规律研究

发布时间：2018-06-30 16:47

本文选题：冲孔量 + 瓦斯抽采　；参考：《中国安全生产科学技术》2017年09期

【摘要】：水力冲孔可通过高压水射流使钻孔孔洞周围煤体形成卸压区,增加煤层透气性,提高抽采效果。不同冲煤量将直接影响孔洞的形态大小和有效抽采半径。以中马村矿为例,通过现场试验、数值模拟等方法分析研究了不同冲煤量对有效抽采半径的影响规律。结果表明:抽采90 d,单位冲煤量为1,1.5,2 t/m的有效抽采半径分别为3.45,3.61,3.88 m与现场得到的结论基本一致。抽采时间一定时,有效抽采半径随着单位冲煤量的增加逐渐增大,但增大趋势逐渐减弱。单位冲煤量一定时,随着抽采时间增加,瓦斯压力逐渐降低,有效抽采半径不断增大。研究结论对优化钻孔布孔参数,提高瓦斯灾害防治效果具有重要意义。
[Abstract]:Hydraulic punching can make the coal body around the hole form pressure relief zone through high pressure water jet, increase the permeability of coal seam and improve the extraction effect. Different amount of coal flushing will directly affect the size of the hole shape and effective extraction radius. Taking Zhongmachun Mine as an example, the influence of different coal flushing on the effective extraction radius is analyzed and studied by field test and numerical simulation. The results show that the effective extraction radius of extraction is 3.45 ~ 3.61 ~ 3.88 m and the effective extraction radius is 3.45 ~ 3.61 ~ 3.88 m, which is in good agreement with the results obtained in the field. When the extraction time is fixed, the effective extraction radius increases gradually with the increase of the unit amount of coal flushing, but the increasing trend gradually weakens. With the increase of extraction time, the gas pressure decreases gradually and the effective extraction radius increases. The conclusion is of great significance for optimizing the parameters of borehole layout and improving the effect of gas disaster prevention.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;郑州煤炭工业(集团)有限责任公司;贵州工程应用技术学院矿业工程学院;
【分类号】：TD712.61

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