基于RFPA^(2D)的顶板诱导崩落时变效应数值模拟  

Numerical simulation of time-varying effecting of induction caving roof based on RFPA^(2D)

作　　者：胡建华[1] 周科平[1] 古德生[1] 苏家红[1] 

机构地区：[1]中南大学资源与安全工程学院湖南省深部金属矿开发与灾害控制重点实验室,湖南长沙410083

出　　处：《中国矿业》2007年第10期86-88,共3页China Mining Magazine

基　　金：国家自然科学基金资助项目(50490274);国家教育部博士点基金(20050533035);中南大学理科发展基金资助项目(07SDF10)

摘　　要：以铜坑矿92#矿体T112-T115顶板诱导崩落试验矿段为研究对象,通过RFPA计算分析了顶板诱导崩落过程的时变效应,发现在顶板可稳最大的暴露空区面积为4500m2;在第四矿段回采后,顶板围岩极大的弱化和冒落,影响顶板高度达到48m。为了保证生产安全条件,人工诱导崩落顶板必须在回采第四步矿段后进行,其人工诱导顶板的安全高度为50m。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。Using the RFPA soft, to the T112-T115 test mine of 92^# orebody in Tongkeng Mine, the time-varying effecting are simulated and analysised to induction caving roof. The results are showed following： ①The steady empty area is up to 4500 m^2. ②when the fourth order, rock of roof have been avianized, the caving line height is 48m, then the roof must be caving by manual inducation in order to make sure safe mine, the safe height of indcation caving engineering must up 50m to empty. The results of 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.

关 键 词：顶板诱导崩落 RFPA 时变效应 采空区 

分 类 号：TD856.11[矿业工程—金属矿开采]