摘要
粒子冲击破岩技术是以高速金属粒子和高速流体破岩为主,以机械钻头破岩为辅的一种新型破岩工艺。针对锥直型加速流道,建立了粒子与流体在冲击破岩过程中速度与加速度的数学模型,分析了冲击过程中能量的吸收规律,提出了单个粒子速度、粒子体积与破岩体积间的函数关系,并基于LSTC-DYNAMIC仿真平台进行了验证分析。基于自主研制的粒子冲击破岩试验装置,开展了粒子直径从0.8 mm^1.4 mm的四种不同直径粒子射流冲击破岩实验,验证了理论模型并提出了粒子体积、冲击速度、流体流速与破岩体积间的匹配关系,为该技术的现场推广提供数据支撑和理论依据。
Particle impact drilling is a new kind of breaking technique, which uses high-speed spherical carbide steel particles and jet flow as a primary means and mechanical breaking for assistance. For flow channel of straight-taper nozzle, a mathematical model of velocity and acceleration in the process of particle and jet flow breaking was established. Through the analysis of the energy absorption law in the impact process, the functional relationship of single particle velocity, particle volume and broken rock volume was established. The results were verified on LSTC-DYNAMIC simulation platform. A particle and jet flow breaking experiment with four particle diameters ranging from 0.8ram to 1.4mm was conducted based on self-developed particle impact rock breaking testing apparatus. The matching relationship of the particle volume, impact velocity, flow velocity and broken volume was verified, which provides supporting data and a theoretical basis for the promotion of this technique.
出处
《工程力学》
EI
CSCD
北大核心
2017年第2期249-256,共8页
Engineering Mechanics
基金
黑龙江省新世纪优秀人才培养计划项目(1254-NCET-005)
黑龙江省博士后科研启动金项目(LBH-Q15018)
关键词
射流破岩
数学建模
仿真
实验研究
粒子
jet flow rock breaking
mathematical modeling
simulation
experimental study
particle
