矿产保护与利用Issue(6)：17-20,4.DOI:10.13779/j.cnki.issn1001-0076.2016.06.004
多次开挖扰动下采空区围岩应力演化数值模拟
Stress Evolution Numerical Simulation of Goa f Surrounding Rock under Repetitious Excavation Disturbance
摘要
Abstract
Taking an iron mine in Handan -Xingtai district as research object and adopting the combined method of field investigation and numerical modeling , the stress evolution law of goaf sur-rounding rock under repetitious excavation disturbance is revealed by using finite element numerical simulation software MIDAS/GTS to build a numerical model of three stage nine stope .The results showed that: the stress of surrounding rock was changing all the time , and the different stopes could produce interaction effects between the same and different levels under repetitious excavation disturbance .In addition , the stope had an obvious disturbance effect on its adjacent stope and di-agonal stope .The barrier pillar became pressure area and the sill pillar became relief area after the first level excavation;when the second level excavation was completed , the pressure area appeared on crown pillar of the first stope , and the relief area on pillars of vertical adjacent stope became pressure area between the first and second levels;after third level excavation , three pillars of adja-cent stope changed from pressure area to relief area .关键词
开挖扰动/数值模拟/围岩/应力演化Key words
excavation disturbance/numerical simulation/surrounding rock/stress evolution分类
矿业与冶金引用本文复制引用
卢宏建,梁鹏,顾乃满,张松林,张九零..多次开挖扰动下采空区围岩应力演化数值模拟[J].矿产保护与利用,2016,(6):17-20,4.基金项目
国家自然科学基金项目（51404086）；河北省自然科学基金项目 （）
