摘要
为了研究弓长岭露天矿台阶爆破扰动对台阶下方浅埋采空区稳定性的影响;根据弓长岭露天矿真实的工程地质条件和施工方案,基于细观损伤力学理论,采用FLAC3D对台阶爆破扰动下采空区损伤演化过程进行了数值模拟,研究了台阶爆破扰动对露天矿浅埋采空区稳定性的影响。结果表明:施加爆破扰动后,采空区顶板变形量增加,而施加爆破扰动位置距离采空区越近,顶板变形增加量也越大;在距离采空区75 m处施加爆破扰动时,采空区顶板有失稳破坏的风险。
In order to study the impact of bench blasting disturbance on the stability of the shallow goaf below the bench in Gongchangling Open-pit Mine,according to the real engineering geological conditions and construction plan of Gongchangling Open-pit Mine,based on the theory of mesoscopic damage mechanics,FLAC3Dnumerical simulation was used to carry out the numerical simulation of the damage evolution process of the goaf under the disturbance of bench blasting,and study the influence of bench blasting disturbance on the stability of the shallow buried goaf in the open-pit mine.The results show that after the blasting disturbance,the deformation of the goaf roof increases,and the closer the blasting disturbance is applied to the goaf,the greater the increase in roof deformation.When the blasting disturbance is applied at a distance of 75 m from the goaf,the roof of the goaf has the risk of instability and damage.
作者
王宇驰
杨勇
王泽琦
李斓堃
杨震
WANG Yuchi;YANG Yong;WANG Zeqi;LI Lankun;YANG Zhen(Open-pit Mining Branch,Gongchangling Mining Corporation of Ansteel Mining,Liaoyang 111008,China;Institute of Rock Instability and Seismicity Research,Northeastern University,Shenyang 110819,China)
出处
《露天采矿技术》
CAS
2023年第1期12-15,共4页
Opencast Mining Technology
基金
国家自然科学基金青年基金资助项目(51904056)
鞍钢集团矿业公司企业委托资助项目(2021-科A07)。
关键词
台阶爆破
动态扰动
浅埋采空区
细观损伤
数值模拟
step blasting
dynamic disturbance
shallow goaf
mesoscopic damage
numerical simulation
