磨料水射流钻头喷嘴设计与试验研究-《郑州大学学报(工学版)》

文章信息/Info

作者:: 卢义玉; 沈晓莹; 黄辰.; 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400044;重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044, 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400044;重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044, 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400044;重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

Author(s):: LU Yi- yu1; 2SHEN Xiao-ying21; 2HUANG chen1; 2; 1.National & Local Joint Engineering Laboratory of Cas Drainage in Complex Coal Seam , Chongqing University ， Chongqing400030 ,China; 2.The State Key Laboratory for Coal Mine Disaster Dynamics and Control，Chongqing University , Chongqing400030 , China

Keywords:: nozzle; abrasive water jets bit; Fluent; uniform design; regression analysis

摘要:: 提出利用磨料水射流钻头解决在硬岩中钻孔速度慢的问题.通过磨料水射流钻头工作原理分析得出喷嘴结构制约了冲孔速度,是决定钻头破岩效率的关键因素.运用均匀设计法和Fluent数值模拟对影响冲孔速度的主要参数进行了研究,确定了磨料水射流钻头喷嘴的最优结构参数和实验参数,得出了喷嘴结构参数与泵压和磨料浓度之间存在交互作用.实验室岩石钻进实验表明,优化后的磨料水射流钻头硬岩钻进速度是原三翼钻头的5.6倍,是对照组1的1.25倍,是对照组2的1.18倍,表明在硬岩中钻进具有显著优越性.

Abstract:: A new type of bits called abrasive water jets bit can solve the problem that the speed is slow in hardrock drilling. The analysis of working principle for abrasive water jets bits shows that the efficiency of breakingrock by abrasive water jets bit is limited by punching speed affected by the structure of nozle.The main pa-rameters of affecting punching speed were studied by uniform design and numerical simulation.The optimumstructure parameters of nozzle and experimental parameters were determined.There are interactions betweenpressure,abrasive concentration with structures of nozle.Laboratory experiments show that the drilling speedby optimized abrasive water jets bit is 1.57 times faster than original three wings bit,1.25 times larger thancontrol group 1 and 1.18 times than control group 2,which shows significant advantages in hard rock drilling.