煤矿安全2017，Vol.48Issue(2)：101-104,4.DOI:10.13347/j.cnki.mkaq.2017.02.027
煤矿井下反循环取样钻头外喷孔参数优化
Parameters Optimization for External Nozzle of Reverse Circulation Sampling Drill Bit in Underground Coal Mine
摘要
Abstract
The underground coal mine air reverse circulation sampling technique is important to improve accuracy of determining gas content by direct method.Numerical modeling is used to study and optimize the angle and position of coal mine air reverse circulation sampling drill bit nozzle.The research resuhs show that when the external nozzle angle is 15 ° and the arrangement is appropriately away from the drill teeth,it can make drill bit produce better reverse circulation effect;increasing the sampling depth and improving the quality of sampling can prevent drill bit damage and drill burying accidents.关键词
瓦斯含量/空气反循环/取样钻头/钻头外喷孔/数值模拟Key words
gas content/air reverse circulation/sampling drill bit/external nozzle of drill bit/numerical modeling分类
矿业与冶金引用本文复制引用
张睿..煤矿井下反循环取样钻头外喷孔参数优化[J].煤矿安全,2017,48(2):101-104,4.基金项目
“两江学者”计划专项资助项目([2013]渝九证字第1406号) （[2013]渝九证字第1406号）
