基于特征粒径的盘形滚刀破岩最优贯入度分析

Analysis of the Optimal Penetration of Disc Cutter in Rock Breaking Based on Characteristic Particle Size

基于北京工业大学机械破岩平台,对泥岩和青砂岩组合的复合岩体进行盘形滚刀线性切割试验,探索盘形滚刀破岩后的岩渣特性与贯入度的关系。试验过程中设置6组不同的贯入度(1.0 mm、3.0 mm、5.0 mm、7.0 mm、9.0 mm和11.0 mm),收集不同贯入度下滚刀破岩产生的岩渣,使用Rosin-Rammler函数分析岩渣数据,引入特征粒径理论分析滚刀破岩时的最优贯入度,提出一种基于特征粒径理论确定最优贯入度的方法。通过对比分析,发现利用特征粒径理论得到的最优贯入度与通过比能得到的最优贯入度一致,验证了所提方法的有效性,且该方法更为直接、方便。

Based on the mechanical rock breaking platform of Beijing University of Technology,the linear cutting test is performed with disc cutters on the composite rock mass composed of mudstone and green sandstone,to explore the relationship between the rock debris features and the penetration after rock breaking with disc cutters.During the test,six sets of different penetrations(1.0 mm,3.0 mm,5.0 mm,7.0 mm,9.0 mm and 11.0 mm)are set to collect the rock debris generated from rock breaking with the disc cutters at different penetrations.The Rosin-Rammler function is used to analyze the rock debris data,and the characteristic particle size theory is used to analyze the optimal penetration during rock breaking with the disc cutters.Furthermore,a method based on the characteristic particle size theory is proposed to determine the optimal penetration.Through comparative analysis,it was found that the optimal penetration obtained using the characteristic particle size theory is consistent with the optimal penetration obtained through specific energy,which verifies the effectiveness of the proposed method;and this method is more direct and convenient.