摘要
利用FLAC3D有限元分析软件,根据开采深度、矿体倾角、矿体厚度三因素设计L16(45)正交试验方案模型。极差和方差分析结果表明:对水平最大位移和移动范围的影响程度,开采深度>矿体倾角>矿体厚度;对垂直最大位移的影响程度,矿体倾角>开采深度>矿体厚度;地表水平位移呈"山峰-山谷"型曲线,山谷段随着倾角的增加逐渐向下盘方向移动。下沉曲线为漏斗型曲线,开采深度增加到某一深度后,靠近矿体中心附近的岩体会发生隆起。随着矿体倾角的增加,影响地表出现移动盆地的矿体开采深度也相应增加,即矿体倾角越小,越容易在地表形成移动盆地。形成的边界角随着开采深度的增加而减小,逐渐稳定于50°左右,矿体的倾角越大,边界角趋于稳定的速度越快。
With use of FLAC3D finite element analysis software,L16(45) orthogonal test model is designed according to mining depth,orebody dip angle and orebody thickness. The range and variance analysis show that the influencing factors on horizontal maximum displacement and range of movement is listed as mining depth > orebody dip > orebody thickness and the influencing degree of factors on vertical maximum displacement is listed as orebody dip angle> mining depth > orebody thickness. The horizontal displacement of surface shows a "peak-valley" curve,and the valley section moves downward to the footwall with the increasing of dip angle. The subsidence curve shows a funnel-shaped curve as that when the mining depth increases to a certain depth,the rock mass near the center of the ore body will be uplifted. With the increasing of orebody dip angle,the mining depth of mobile basins on the surface increases,that is,the smaller the orebody dip angle,the easier the mobile basin forms on the surface. The formed boundary angle decreases with the increasing of mining depth,and gradually stabilizes at about 50 degrees. The bigger the dip angle of ore body,the faster the boundary angle tends to be stable.
作者
韩智勇
曹建立
刘洋
刘欢
李广辉
谭宝会
Han Zhiyong;Cao Jianli;Liu Yang Liu Huan;Li Guanghui;Tan Baohui(College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2020年第2期158-162,共5页
Metal Mine
基金
十三五国家重点研发计划课题(编号:2016YFC0801606)。
关键词
急倾斜厚矿体
地表岩移
数值模拟
正交试验
Steeply inclined and thick ore-body
Surface strata movement
Numerical simulation
Orthogonal tests
