问题 |
E3S网页汇编
卷积2572021
5线程能源科学与环境工程进步国际讲习班(AESEE 2021) |
|
---|---|---|
文章号 | 03076 | |
页数 | 10 | |
段内 | 环境监控修理和污染控制 | |
多尔市 | https://doi.org/10.1051/e3sconf/202125703076 | |
在线发布 | 2021年5月12日 |
数值模拟分析基于对三角形流水管渣排机制研究
一号重庆艺术科学大学机械电气工程学院
2智能设备制造信息技术学院重庆艺术大学
3机械电气工程学院,Emei校园,西南桥东大学,Emei四川市,614202,中国
4重庆研究所有限公司中国煤技术工程集团
*对应作者:tylq@126.com
According to the characteristics of high efficiency and high hole forming rate of the triangular-shaped drill pipe in the process of drilling in soft outburst coal seam, the slag discharge model of annular gap between the triangular-shaped drill pipe and hole wall is established by using the basic theory of computational fluid dynamics.Using the finite volume element method, the flow field characteristics of the annular flow area between drill pipe and hole wall are analyzed.Through the numerical simulation analysis, the velocity fluctuation effect of the annular flow field of the slag removal model is put forward, that is, the velocity fluctuation zone is formed between the sides of the arc edge of the triangular-shaped drill pipe, which causes the precipitated coal cinder to rise under the vortex action of the flow field, and is quickly discharged out of the hole under the coordination of the axial velocity, which effectively improves the slag removal efficiency and pore forming rate of the drill pipe.Finally, the comparative test of the triangular-shaped drill pipe and wide-blade spiral drill pipe was carried out in the soft outburst coal seam of 31021 lower auxiliary roadway in a mine.钻深度提高19.4%,洞组成率提高17.4%,钻效率提高26.4%。没有钻孔下降和破解现象
必威西汉姆赞助2021年EDP科学出版
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