矿冶工程
礦冶工程
광야공정
2015年
2期
38-41,46
,共5页
郭阳%李夕兵%马春德%马少维%杨晨
郭暘%李夕兵%馬春德%馬少維%楊晨
곽양%리석병%마춘덕%마소유%양신
应力状态%开挖%采场稳定性%数值模拟
應力狀態%開挖%採場穩定性%數值模擬
응력상태%개알%채장은정성%수치모의
stress states%excavation%stability of stope%numerical simulation
为研究开挖影响采场稳定性的应力因素,利用ABAQUS有限元分析软件,对不同应力状态下的采场稳定性进行了数值模拟,结果表明:当侧压力系数接近于1时有利于开挖的安全性;初始应力增大有利于减小开挖引起的应力重分布过程中的应力增加;初始侧向应力增加有利于开挖后的应力释放,有利于减小开挖后边壁处的竖向应力。
為研究開挖影響採場穩定性的應力因素,利用ABAQUS有限元分析軟件,對不同應力狀態下的採場穩定性進行瞭數值模擬,結果錶明:噹側壓力繫數接近于1時有利于開挖的安全性;初始應力增大有利于減小開挖引起的應力重分佈過程中的應力增加;初始側嚮應力增加有利于開挖後的應力釋放,有利于減小開挖後邊壁處的豎嚮應力。
위연구개알영향채장은정성적응력인소,이용ABAQUS유한원분석연건,대불동응력상태하적채장은정성진행료수치모의,결과표명:당측압력계수접근우1시유리우개알적안전성;초시응력증대유리우감소개알인기적응력중분포과정중적응력증가;초시측향응력증가유리우개알후적응력석방,유리우감소개알후변벽처적수향응력。
In order to investigate factors governing the stability of stope under excavation, numerical simulation was conducted with ABAQUS finite element software for the stability of stope under different stress conditions. It can be concluded from the analysis that the coefficient of lateral pressure approaching to 1 can increase the safety in excavation. An elevated initial stress can slow down the increase rate of stress in the process of stress redistribution caused by excavation, while an elevated initial lateral stress is beneficial to releasing the post?excavation stress, thus reducing the vertical stress at the side wall after excavation.