有色金属科学与工程2024，Vol.15Issue(1)：87-96,10.DOI:10.13264/j.cnki.ysjskx.2024.01.011
岩体变形及二次应力下矿体开采效应研究
Study on ore-body mining effect under rock mass deformation and secondary stress
摘要
Abstract
In order to understand the influence of the mining effect of the surrounding rock under deformation and secondary stress,this paper selected the-410 m section to study the ore body effect of caving mining by combining field test and numerical simulation.The results show that the surrounding rock stress changes in shock,there is a stress reduction area near the upper and lower wall surrounding rock of the orebody,the foote is larger than the hanging wall,the maximum principal stress of the roof reaches 0.44 MPa,and local stress concentration.In addition,the stress concentration parts showed similar horizontal scattered distribution phenomenon.At the same time,the mining boundary presents the state of crack development.The horizontal ore body has a slight subsidence trend,and the fault fracture zone is easy to appear near the boundary of the horizontal roadway and the roof crack in the middle section.The deformation in the vertical direction is obvious,and the inclined part is elliptical distribution.The maximum subsidence displacement is 8.00 mm,and the maximum upward deformation is 3.03 mm.The stress extrusion phenomenon is easy to occur near the intersection line.The study has certain guiding significance to grasp the deformation law of rock mass and mine safety information in time and accurately so as to carry out mining safely,effectively and reasonably.关键词
围岩变形/应力集中/现场试验/数值模拟/开采效应Key words
surrounding rock deformation/stress concentration/field test/numerical simulation/mining effect分类
矿业与冶金引用本文复制引用
向欣欣,张耀平,雷大星..岩体变形及二次应力下矿体开采效应研究[J].有色金属科学与工程,2024,15(1):87-96,10.基金项目
江西省教育厅科学技术研究项目(GJJ218511) （GJJ218511）
