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由于高压水射流破岩的影响因素繁多和作用机理的复杂,运用动态非线性有限元法,进行高压射流的数值试验,分析破岩过程中应力及破岩深度变化,以破岩过程中诸如射流速度、射流直径、射流入射角度、射流束数等控制参数为研究方向,基于ANSYA/LS-DYNA进行不同井深条件岩石破坏的显示动力有限元分析。结果表明,进行高压水射流破岩时选取不同射流控制参数所实现的射流效率明显不同,射流速度和射流直径的增大都会增加破岩的深度;射流垂直入射时,破岩效果最好;射流束数和破岩深度成反比。以本文研究结果指导实际现场操作,可以有效提高破岩效率。
Because of the numerous influencing factors and complicated mechanism of action of rock breaking by high pressure water jet, the dynamic nonlinear finite element method is used to carry out numerical experiments of high pressure jet to analyze the changes of stress and rock breaking depth during rock breaking. Velocity, jet diameter, jet incident angle, jet beam number and other control parameters for the study direction, based on the ANSYA / LS-DYNA different depth conditions of rock failure display dynamic finite element analysis. The results show that the efficiency of jets selected by different jet control parameters during the rock breaking of high pressure water jets is obviously different. The increase of jets velocity and jet diameter will increase the depth of rock breaking. When the jets are perpendicularly injected, the rock breaking effect is the best. The number of beams is inversely proportional to the rock breaking depth. The results of this paper to guide the actual operation of the site, you can effectively improve rock breaking efficiency.