结构工程师2026，Vol.42Issue(4)：72-78,7.DOI:10.15935/j.cnki.jggcs.202604.0009
PDC复合冲击钻下的岩石破碎过程应力变化规律研究
Study on Stress Variation Law of Rock Fragmentation Process under PDC Composite Impact Drilling
张剑 1王宁 1王朝义 1王崇 1王升1
作者信息
- 1. 河南省核技术应用中心,郑州 450044
- 折叠
摘要
Abstract
To refine the independent influence of key variables on stress variation,the stress variation patterns during rock fragmentation under PDC composite impact drilling were investigated.A 2 500-300 m rock section from a specific area was selected as the research subject.Based on the stress variation patterns,EDEM was configured with contact parameters for experimental rock and steel plate materials.A 3D simulation model was created using CAD,and the normal constraint state was determined by analyzing the bonding relationships of rock particles.A rock particle contact model was constructed to analyze critical tangential stress,critical normal stress,tangential contact stiffness,and normal contact height.The uniaxial compression method was used to validate and set the loading speed and average loading time.The impact drilling contact position was adjusted for stress zeroing,and the experimental force relationship during loading was recorded.It was concluded that stress variation is related to cutting time,fragmentation mode,cutting depth,cutting tooth diameter,and cutting angle.The results indicate that when the cutting parameter includes a 5° cutting inclination angle,an 8mm cutting diameter,a 2 m/s cutting speed,and a 2.5 mm cutting depth,the cutting stress is lower,and the excavation efficiency is higher.关键词
PDC复合冲击钻/岩石破碎/应力变化规律/掘进效率/离散元方法Key words
PDC composite impact drill/rock fragmentation/stress variation law/excavation efficiency/discrete element method分类
矿业与冶金引用本文复制引用
张剑,王宁,王朝义,王崇,王升..PDC复合冲击钻下的岩石破碎过程应力变化规律研究[J].结构工程师,2026,42(4):72-78,7.
