摘要
为了研究影响顺层钻孔抽采瓦斯的因素,采用理论分析和数值模拟的方法,分析了煤体有效应力,建立了顺层钻孔抽采三维几何模型,数值模拟了不同抽采时间下顺层钻孔周围瓦斯含量分布情况、不同抽采负压下顺层钻孔周围煤体孔隙率变化规律以及不同钻孔直径下顺层钻孔周围瓦斯含量分布情况。研究为顺层钻孔抽采瓦斯的钻孔设计提供技术支持。
In order to study the factors affecting gas extraction by borehole along seam,the effective stress of coal body was analyzed by theoretical analysis and numerical simulation.A three-dimensional geometric model of gas extraction along seam was established.The gas content distribution around borehole along seam under different extraction time,the variation law of coal porosity around borehole along seam under different negative pressure and the diameter of borehole were simulated by numerical simulation.Distribution of gas content around boreholes in lower bedding.The research provided technical support for borehole design of bedding gas extraction.
作者
方亮
张青
Fang Liang;Zhang Qing(Juji Coal Mine,Yongcheng Coal Company,Henan Energy and Chemical Industry Group,Yongcheng 476600,China)
出处
《能源与环保》
2019年第10期33-36,共4页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
顺层钻孔
影响因素
抽采时间
抽采负压
钻孔直径
borehole along seam
influencing factors
extraction time
extraction negative pressure
borehole diameter
