摘要
基于有效压力指标法测定原理及方法,对河北某矿煤层钻孔有效抽放半径进行了测定,得出有效抽放半径与抽放时间之间的拟合曲线,认为该煤层89 mm抽放钻孔的极限有效影响半径为8.7 m,极限抽放时间为300 d,而抽放时间定为90 d,即有效抽放半径为4.5 m比较经济合理。
Based on the principles and methods of pressure index,the drilling drainage radius in a coal seam of Hebei is measured with the method,and the fitting curve between the effective drainage radius and drainage time is educed.The result shows that the limit effective influence radius of 89 mm drainage drilling is 8.7 m in this coal seam,the limit drainage time is 300 d.Determining 90 d to the just drainage time,in other words determining 4.5 m to the just drainage radius is more economical and rational.
出处
《煤矿安全》
CAS
北大核心
2013年第8期166-168,共3页
Safety in Coal Mines
关键词
有效压力指标
抽放半径
钻孔有效抽放系数
极限抽放时间
有效影响半径
effective pressure index
drainage radius
drilling effective drainage coefficients
limit drainage time
effective influence radius
