中南大学学报（自然科学版）2017，Vol.48Issue(10)：2709-2714,6.DOI:10.11817/j.issn.1672-7207.2017.10.021
冲击诱导损伤岩石的切削特性
Cutting features of damage rock by shock disturbance
摘要
Abstract
In order to improve the drilling efficiency and reduce tools wear, a new rock fragmentation method of shock disturbance was presented. Based on the theory of Walsh, the crack model of the damaged rock around the induced hole was established, the intrusive coefficient equation of cone bit was derived, and the drilling rate model around the induced hole was built. The influence of crack density and the disturbance frequency on the elastic modulus, intrusive coefficient and the cutting force was studied. The results show that with the increase of crack density, the effective elastic modulus decreases and the intrusive coefficient decreases. Under a certain range of internal friction angle, the penetration rate increases obviously with the increase of the crack density. Under the condition of certain axial load, the cutting force of the one-cone bits decreases obviously with the increase of the disturbance frequency.关键词
牙轮钻/冲击诱导/裂纹密度/侵入系数Key words
one-cone bits/shock disturbance/crack density/intrusion coefficient分类
数理科学引用本文复制引用
吴万荣,娄磊,梁向京..冲击诱导损伤岩石的切削特性[J].中南大学学报（自然科学版）,2017,48(10):2709-2714,6.基金项目
国家自然科学基金资助项目(51774340) （51774340）
高性能复杂制造国家重点实验室基金资助项目(zzyjkt2015-03) (Project(51774340) supported by the National Natural Science Foundation of China （zzyjkt2015-03）
Project(zzyjkt2015-03) supported by the State Key Laboratory of High Performance Complex Manufacturing) （zzyjkt2015-03）
