考虑煤层含水率的穿层钻孔布置参数优化研究
发布时间：2018-10-21 10:09
【摘要】：针对于含水率较大煤层的瓦斯钻孔抽采半径受含水率影响较大的问题,借助含水率与煤体渗透率的动态关系,结合误差对比分析,对瓦斯压力值进行参数拟合,得出了适用于水-瓦斯-煤三相耦合的Klinkenberg效应方程及煤体孔隙率-含水率关系的方程。在上述模型基础下,结合现场实际条件,模拟了穿层钻孔最佳的抽采半径,并在现场运用,钻孔间距10 m时瓦斯抽出在73.2%左右,抽采效果良好。
[Abstract]:In view of the problem that the radius of gas borehole drainage in coal seam with high moisture content is greatly affected by water content, by virtue of the dynamic relationship between water content and permeability of coal body, combining with the comparative analysis of errors, the parameter fitting of gas pressure value is carried out. The equation of Klinkenberg effect and the relation between porosity and water content of coal body are obtained, which are suitable for the three-phase coupling of water, gas and coal. On the basis of the above model, combined with the actual conditions on the spot, the optimum extraction radius of the perforated borehole is simulated, and it is used in the field. The gas extraction is about 73.2% when the borehole spacing is 10 m, and the drainage effect is good.
【作者单位】： 中煤科工集团重庆研究院有限公司;
【基金】：国家科技重大专项资助项目(2016ZX05043-005)
【分类号】：TD712.6
[Abstract]:In view of the problem that the radius of gas borehole drainage in coal seam with high moisture content is greatly affected by water content, by virtue of the dynamic relationship between water content and permeability of coal body, combining with the comparative analysis of errors, the parameter fitting of gas pressure value is carried out. The equation of Klinkenberg effect and the relation between porosity and water content of coal body are obtained, which are suitable for the three-phase coupling of water, gas and coal. On the basis of the above model, combined with the actual conditions on the spot, the optimum extraction radius of the perforated borehole is simulated, and it is used in the field. The gas extraction is about 73.2% when the borehole spacing is 10 m, and the drainage effect is good.
【作者单位】： 中煤科工集团重庆研究院有限公司;
【基金】：国家科技重大专项资助项目(2016ZX05043-005)
【分类号】：TD712.6
【参考文献】
相关期刊论文 前10条
1 许江;耿加波;彭守建;刘东;聂闻;;不同含水率条件下煤与瓦斯突出的声发射特性[J];煤炭学报;2015年05期
2 李树刚;赵鹏翔;林海飞;肖鹏;魏宗勇;;煤岩瓦斯“固-气”耦合物理模拟相似材料特性实验研究[J];煤炭学报;2015年01期
3 周哲;卢义玉;葛兆龙;杨枫;张欣玮;;水-瓦斯-煤三相耦合作用下煤岩强度特性及实验研究[J];煤炭学报;2014年12期
4 彭信山;刘明举;陈阳;王倩;;含水性及水动力条件对煤层瓦斯逸散与赋存的控制作用[J];煤炭学报;2014年S1期
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