采矿与安全工程学报2025，Vol.42Issue(2)：463-471,9.DOI:10.13545／j.cnki.jmse.2024.0052
振动冲击复合加载下青砂岩破裂特征及断裂能利用效率研究
Study on the fracturing characteristics and utilization efficiency of fracturing energy in green sandstone under vibration-impact composite loading
摘要
Abstract
This study aims to delve into the fracturing characteristics and utilization efficiency of fractu-ring energy in rock under vibration-impact composite loading.First,physical experiments and micro-scopic parameter calibration were conducted.On this basis,the macro-micro mechanical response rela-tionship of green sandstone was established,and the fracturing characteristics and crack distribution char-acteristics in green sandstone under vibration-impact composite loading were analyzed.Additionally,the fracturing energy and its utilization efficiency were also discussed.The results show that under vibration-impact composite loading,the fracturing of green sandstone intensifies with the increase of vibration am-plitude and frequency,and the fracturing characteristics resemble the crack distribution characteristics in this process.Shear cracks are the main cause of crack propagation and extension,while final fracturing results from the interaction between tensile cracks and shear cracks.Both the fracturing energy and its u-tilization efficiency can be significantly promoted by changing the impact velocity,and they can be slightly enhanced by changing the vibration amplitude and frequency.The research results not only give a preliminarily illustration of the fracturing characteristics and utilization efficiency of fracturing energy in green sandstone under vibration-impact composite loading,but also provide reference for reasonable se-lection of parameters in the process of rock crushing.关键词
青砂岩/振动冲击/破裂特征/断裂能利用效率Key words
green sandstone/vibration-impact/fracture characteristics/utilization efficiency of fracture energy分类
矿山工程引用本文复制引用
赵环帅,王田,潘永泰,毕研琨,张钏,乔鑫,赵英嘉,张志镇,卢美全,叶黔玉..振动冲击复合加载下青砂岩破裂特征及断裂能利用效率研究[J].采矿与安全工程学报,2025,42(2):463-471,9.基金项目
国家自然科学基金面上项目(52074308) （52074308）
