西安科技大学学报2017，Vol.37Issue(2)：159-163,5.DOI:10.13800/j.cnki.xakjdxxb.2017.0203
基于声发射特征的覆岩采动裂隙演化规律研究
Study of the dynamic evolution rules of mining fracture based on acoustic emission technique
摘要
Abstract
To study the law of energy release during mining fracture evolution,based on experimental conditions,through the methods of physical similar simulation and theoretical analysis,combined with acoustic emission technology,we studied acoustic emission characteristics during mining fracture evolution.Results show that it is a complicated process of energy dissipation for the dynamic evolution of mining fracture.During the initial stage of model excavation,the damage of overburden rock is feeble,and the acoustic emission is not obvious.The displacement of strata is small,only separation fractures appear;during the medium stage of model excavation,acoustic emission phenomenon is obvious with the increase of the times of periodic pressure,and broken fissures develop in the horizontal and vertical directions;with the excavation of model,during the periodic pressure,the receiving times of acoustic emission is stable gradually,energy dissipation also tends to be stable,and broken fissures develop only in the horizontal direction with the excavation of model.关键词
覆岩/采动裂隙/声发射/能量耗散Key words
overburden rock/mining fissure/acoustic emission/energy dissipation分类
矿业与冶金引用本文复制引用
李志梁,李树刚,林海飞,秦伟博,陈高峰..基于声发射特征的覆岩采动裂隙演化规律研究[J].西安科技大学学报,2017,37(2):159-163,5.基金项目
国家自然科学基金科学仪器基础研究专款(51327007) （51327007）
国家自然科学青年基金(51304156) （51304156）
