摘要
喷嘴直径、泵压、磨料浓度是磨料水射流辅助岩石钻进技术的关键水力学参数,这3个因素直接影响磨料射流的冲孔速度,从而影响磨料水射流钻头的破岩效率.通过理论分析建立了冲孔速度与关键水力学参数的关系式,并进行了磨料射流冲蚀灰岩试验.理论分析和试验结果表明:喷嘴直径对冲孔速度影响最大,其次是泵压和磨料浓度的影响.对试验数据进行回归分析,得到了方便现场应用的冲孔速度计算公式.本文的研究成果为新型磨料水射流钻头岩石钻进速度的选择提供了依据.
To abrasive water jets (AWJ) assisted bit for rock drilling, the penetration speed efficiency can be effected by three main hydraulic parameters of AWJ, namely nozzle diameter, jet pressure and abrasive concentration. By theoretically analyzing, equation for the relationship between penetration speed and main hydraulic parameters was established. The AWJ drilling experiment within limestone was carried out as well. Results obtained from theoretical and experimental ways indicated that nuzzle diameter was the most important effect factor to penetration speed, which was followed by jet pressure and abrasive concentration orderly. Convenient calculation formula of penetration was derived from regression analysis of experimental data. The achievements of present study provide reference evidences for drilling speed of this new abrasive water jets bit.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2012年第5期837-845,共9页
Journal of Basic Science and Engineering
基金
国家创新群体基金资助项目(50921063)
国家自然科学基金(51104191)
重庆市杰出青年基金资助项目(CSTC
2009BA6047)
国家自然科学基金青年基金(51204122)
中国博士后科学基金(2012M511270)
