球型镶齿滚刀参数对破岩比能影响性研究

Study on influence of the rock breaking specific energy based on parameters of spherical insert hob

研究球型镶齿滚刀破岩过程中刀盘转速、钻压、镶齿数、刀盘间距以及贯入度5种因素对破岩比能的影响,利用ABAQUS有限元计算软件,建立双排滚刀直线切割围岩的动力显式模型;基于正交试验法,设置五因素四水平正交试验L16(4~5),通过极差分析和方差分析找出不同因素变化对破岩比能的影响规律,并对比分析最优组合和最不利工况下滚刀滚动力和破岩效果。研究结果表明:影响滚刀破岩比能因素的主次顺序依次是钻压、刀盘排距、转速、刀齿数和贯入度;适用于中风化凝灰岩互层的钻具参数为转速12.56 m/s,钻压25 kN,刀齿数34个,刀盘排距35 mm,贯入度1 mm,此时的破岩比能为0.382 8 MJ/m^3,优化效果较好。

The influences of five factors on rock breaking specific energy of spherical insert hob, such as rotational speed, drilling pressure, number of cutter teeth, cutter head spacing and penetration, were studied. The dynamic explicit model of double row hob cutting surrounding rock in straight line was established by using ABAQUS finite element calculation software. Based on orthogonal test method, five factors and four levels orthogonal test L16(45) was set up. Through range analysis and variance analysis, the influence law of different factors on rock breaking specific energy was found, and the rolling force and rock breaking effect of hob under the optimal combination and the most unfavorable conditions were compared and analyzed. The results show that: the order of influencing factors of rock-breaking specific energy of hobs is drilling pressure, cutter head spacing, rotational speed, number of cutter teeth and penetration. The parameters of drilling tools suitable for weathered tuff interbedding are rotational speed 12.56 m/s, drilling pressure 25 kN, number of cutter teeth 34, cutter head spacing 35 mm, penetration 1 mm, and rock-breaking specific energy at this time. The optimum result is 0.382 8 MJ/m^3.