摘要
利用时变边界力学理论讨论了连续采矿顶板诱导失稳崩落过程,给出了连续回采诱导顶板失稳崩落中时变边界的几何描述.RFPA软件通过单元性质弱化的方法来处理单元的破坏问题,准动态的模拟崩落体的时变边界问题,从而获得连续采矿诱导顶板失稳崩落时变边界的一种有效解决途经.通过RFPA计算分析了铜坑矿充填体下矿体连续开采诱导顶板失稳崩落过程,分析该过程中顶板诱导失稳崩落的时变效应及其规律.计算结果表明在一定的连续回采采空区的空间条件下,运用局部人工干扰诱导顶板围岩致裂,可以有效形成顶板诱导失稳崩落.
The process of continuous mining and induction caving roof are analyzed by the theroy of time-varying mechanics. The geometry of boundary are described when the continuous mining and induction caving roof. To RFPA soft,it is effective method throught avianizeing the parameters of elements to handle the destroy element, simulate the time-varying boundary condition. By the method,the problems of the time-varying boundary are sloved to the contiuous mining and induction caving roof. Using the RFPA soft, the time-varying effectings and laws are analysesed to continuous mining and induction caving roof under complex filling body. The results of the time-varying effecting show that the enclosing rock mass are avianized by the change of mining stope space,the roof is induced fractureing by artificial disturbance in the part roof,and insteability caving in roof,it is effective method to handle empty.
出处
《广西大学学报(自然科学版)》
CAS
CSCD
2008年第1期96-99,共4页
Journal of Guangxi University(Natural Science Edition)
基金
“十一五”国家科技支撑计划重点项目(2006BAB02A02)
国家自然科学基金资助项目(50490274)
国家教育部博士点基金资助项目(20050533035)
中南大学理科发展基金资助项目(07SDF10)
关键词
时变力学
连续采矿
诱导失稳
RFPA
time-varying mechanics
success mining
induction instability
RFPA