爆炸衬砌过程中流态砂浆内应力变化规律的数值模拟  

Numerical Simulation for Time History of Stress Distributions in the Mortar During Explosive Lining

作　　者：王海亮[1] 李新明[1] 丁慧哲[1] 赵常伟[1] 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建教育部重点实验室,山东青岛266510

出　　处：《科技导报》2007年第23期38-41,共4页Science & Technology Review

基　　金：国家自然科学基金项目(10672091)

摘　　要：应用DYNA-2D有限元程序,对爆炸衬砌过程中流态砂浆内的应力变化进行了数值模拟研究。研究表明,流态砂浆进入应力振荡阶段后,应力振荡的特征是砂浆内各单元不仅沿径向呈层状振荡,而且还沿切向呈团状振荡。在应力振荡初期,以沿径向层状振荡为主;在炸药爆炸并达到最大压力的同时,砂浆内部各单元受到最大压应力的冲击作用。Explosive lining process is numerically simulated by DYNA-2D finite element program, and the time history of stress distributions in the fluid mortar during explosive lining is analyzed. Analysis results indicate that, at the stage of stress oscillation, each mortar element oscillates not only in a lamellar way along the radial directions but also in a way of clustering along the tangential directions. In the initial stages, the fluid mortar elements oscillate mainly in the lamellar way along the radial directions. Each mortar element is subjected to the impact of the maximum compressive stress when the explosive is detonated and reaches its maximum pressure.

关 键 词：爆炸衬砌 流态砂浆 应力 数值模拟 

分 类 号：TU435[建筑科学—岩土工程]