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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 rock breaking technology is based on high-speed metal particles and high-speed fluid rock breaking, broken rock with mechanical drill, a new broken rock technology. Aiming at the conical straight accelerating runner, the mathematical model of the velocity and acceleration of particles and fluid in the course of impact rock breaking is established. The law of energy absorption in the process of impacting is analyzed. The relationship between the particle velocity and the volume of rock mass is presented Function relationship, and based on LSTC-DYNAMIC simulation platform for verification analysis. Based on the self-developed particle impact and rock breaking device, four different diameter particle jet impingement rock breaking tests with particle diameter from 0.8 mm to 1.4 mm were carried out. The theoretical model was validated and the particle volume, impact velocity, fluid velocity and breaking The matching relationship between rock volume provides the data support and theoretical basis for the on-the-spot promotion of this technology.