遇层角法在瓦斯抽采定向钻孔中的计算与应用

doi:10.11799/ce201309031

煤炭工程 ›› 2013, Vol. 45 ›› Issue (9): 91-93.doi: 10.11799/ce201309031

遇层角法在瓦斯抽采定向钻孔中的计算与应用

徐保龙,魏宏超,金新

中国煤炭科工集团西安研究院

收稿日期:2012-11-12 修回日期:2013-01-18 出版日期:2013-09-10 发布日期:2013-09-10
通讯作者: 徐保龙 E-mail:xubaolong@cctegxian.com

The Calculation and Application of the Angle of Penetration Method in Coal Gas Exploiting Directional Borehole

Received:2012-11-12 Revised:2013-01-18 Online:2013-09-10 Published:2013-09-10

摘要/Abstract

摘要：

为了能够直接反映瓦斯抽采定向钻孔轨迹与煤（岩）层的相对位置，优化钻孔轨迹设计并提高钻孔轨迹控制精度，文章提出了遇层角法。首先介绍了遇层角法的概念，然后创建模型并进行了钻孔遇层角的分析与计算，进而导出煤（岩）层法向偏差的计算公式。通过举例说明了遇层角法对于瓦斯抽采定向钻孔轨迹的优化设计与准确控制中具有积极意义。

关键词: 遇层角法, 瓦斯抽采定向钻孔, 法向偏差, 钻孔轨迹

Abstract:

In order to reflect the relative space of the coal gas exploiting directional borehole line and coal or strata and optimize the borehole line design and enhance the accuracy in controlling, so the paper introduced the angle of penetration method. The paper built a model to calculate the angle of penetration and introduced the method to calculate the slice thickness of coal or strata. That the angle of penetration method was benefited to optimize the borehole line design and enhance the accuracy in controlling was concluded by an example.

Key words: the angle of penetration method, coal gas exploiting directional borehole, normal deviation, borehole trajectory