摘要
为了计算瓦斯抽采钻孔合理封孔深度,根据巷道钻孔窥视及数值模拟实验,总结出巷道“三带”的分布与巷道的宽度和高度相关,其规律为松动破碎带为巷道外接圆半径的2倍,集中应力带为巷道外接圆半径的1倍,巷道外接圆半径的3倍以外为原始应力带;通过相关研究结果验证,该规律符合实际;结合有关研究,得出瓦斯抽采钻孔合理封孔深度为巷道外接圆半径的3倍。
In order to calculate the reasonable sealing depth of gas drainage borehole,the experiment of peeking and numerical simulation according to the tunnel drilling,the distribution of"three zones"in roadway is related to the width and height of roadway.The regularity is that the loose fracture zone is 2 times of the circumscribed circle radius of the roadway and the concentrated stress zone is 1 times the radius of outer circle and 3 times the original stress zone;through the related research result verification,the law is in line with reality;in conjunction with relevant research,the reasonable sealing depth of gas drainage borehole is 3 times of the circumscribed circle radius of roadway.
作者
郑伟
张仁松
张际涛
ZHENG Wei;ZHANG Ren-song;ZHANG Ji-tao(Guizhou Institute of Technology,Guiyang 550000,China;Guizhou Zhiyuan Engineering and Technical Consulting Co.,Ltd.,Guiyang 550000,China)
出处
《煤炭技术》
CAS
北大核心
2021年第7期122-125,共4页
Coal Technology
关键词
巷道
三带
钻孔
封孔深度
计算
roadways
three zones
borehole
sealing hole depth
calculation
