工程科学学报2025，Vol.47Issue(1)：13-24,12.DOI:10.13374/j.issn2095-9389.2023.11.22.001
刃宽对硬岩掘进影响的仿真及试验研究
Research on disc cutter excavation characteristics for different blade width based on numerical simulations and experiments
摘要
Abstract
This study addresses the abnormal failures,such as blade fractures and wear,encountered by disc cutters when excavating hard rock with high uniaxial compressive strength.It is crucial to understand how disc cutter geometric parameters affect excavation efficiency and load,especially when performing disc cutter excavation on hard rock.We propose a rock modeling approach that combines a cohesive model with a solid model,leveraging the characteristics of a cohesive element.The model follows the double linear constituted evolution criterion and the Benzeggagh-Kenane damage failure criteria.Calibration of the cohesive model's microscopic parameters was based on the uniaxial compressive strength test and Brazilian splitting tests,using stress reduction rate curves and crack morphology from these experiments.We developed a simulation model for rock breaking during disc cutter excavation and validated it through linear cutting tests.The study examines linear cutting test results and the simulation of rock breaking during disc cutter excavation results.This study examines how disc cutter width affects rock breaking by considering load curves,rock breaking volume,and specific energy.Results indicate that the cohesive constitutive model effectively simulates rock crack initiation and propagation.The rock breaking process comprises three stages:elastic,crack initiation-propagation,and rock unloading.The crack initiation-propagation stage is critical for rock breaking efficiency.Results show that disc cutter load and rock break volume increase with increasing penetration,blade width,and cutter spacing.Specific energy initially decreases with blade width increase and then increases.Optimal excavation efficiency occurs with a blade width of 13 mm and a spacing of 80 mm,whereas a 7-mm blade fails to achieve complete rock fragmentation,resulting in low efficiency.关键词
滚刀刃宽/Cohesive模型/线切割试验/破岩载荷/破岩效率Key words
cutter blade width/cohesive model/linear cutting test/disc cutter load/rock-breaking efficiency分类
交通运输引用本文复制引用
尚勇,孙靖东,姜海峰,许顺海,段红磊,孙朝阳..刃宽对硬岩掘进影响的仿真及试验研究[J].工程科学学报,2025,47(1):13-24,12.基金项目
国家重点研发计划资助项目(2022YFE0123700) （2022YFE0123700）
国家自然科学基金资助项目(52161145407,U22A20186) （52161145407,U22A20186）
北京建龙重工集团有限公司资助项目(2023-1222) （2023-1222）
