基于3DMine-FLAC^(3D)的复杂采空区稳定性分析  

Stability analysis of complex goaf based on 3DMine-FLAC^(3D)

作　　者：杨宁 尹贤刚 钟勇 林尧 YANG Ning;YIN Xiangang;ZHONG Yong;IJN Yao(Changsha Institute of Mine Research Co.,Lid.,Changsha Hunan 410012 ,China;National Key Laboratory of Safety Tech no logy of MetalMine,Changsha Hunan 410012 ,China;National Engineering Research Center for Metal Mining.Changsha Hunan 410012,China;Luoyang Kunyu Mining Co. . Ltd.,Luoyang Henan 471700,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]国家金属采矿工程技术研究中心,湖南长沙410012 [3]金属矿山安全技术国家重点实验室,湖南长沙410012 [4]洛阳坤宇矿业有限公司,河南洛阳471700

出　　处：《化工矿物与加工》2019年第4期22-24,28,共4页Industrial Minerals & Processing

基　　金："十二五"国家科技支撑计划课题(2015BAB14B01)

摘　　要：某矿山经空场法开采多年,形成大量采空区,为消除采空区造成的安全隐患,需对采空区稳定性进行研究。通过实地调查、现场取样以及室内岩石力学试验得到矿岩力学参数,利用3DMine软件建立了矿山采空区的三维可视化模型,以此为基础,采用FLAC^(3D)数值模拟软件对采空区的稳定性进行了模拟分析,结果表明:Ⅰ号、Ⅱ号、Ⅲ号采空区对周围岩体的影响最大,Ⅰ号采空区上部地表位移较大,塑性区连通至地表,是矿体开采对地压影响最大的采空区。Ⅱ号采空区围岩上盘中部区域受拉应力影响较大,影响采空区的整体稳定性;Ⅰ号采空区与Ⅲ号采空区之间区域的岩体出现剪切破坏,Ⅲ号采空区顶板围岩稳定性较差。为保证安全生产,应尽快对采空区进行治理。a large number of goaf areas have been formed in a mine after many years of open-pit mining. In order to eliminate the hidden danger caused by the goaf .the stability of goaf needs to be studied. The parameters of ore-rock mechanics were obtained through the on-site investigation. field sampling and laboratory rock mechanics tests and the 3D visualization model of mined-out area was established by using 3DMine software.On this basis, the stability of goaf was simulated and analyzed with FLAC^3D 11 numerical simulation software. The results show that No.I . No.Ⅱ and No.Ⅲ goafs have the greatest influence on the surrounding rock mass and No. I goaf with a large surface dis placement in its upper part and the plastic zone being connected to the surface is the mined-out area that the ore body mining has the biggest influence on the ground pressure. The central part of surrounding rock on the hanging wail in No.Ⅱ goaf is significantly affected by tensile stress. affecting the overall stability of minedout area. Shear failure occurs in the rock mass in the area between No. I goaf and No.Ⅲ goaf whose roof surrounding rock has poor stability. The goafs should be duly treated to ensure safe production.

关 键 词：空场法 采空区 三维模型 数值模拟 稳定性分析 

分 类 号：TD325[矿业工程—矿井建设]