摘要
运用三维非线性孔隙介质固液耦合模型,研究了饱和介质条件下地下开采对上覆岩层变形和地表移动的影响,并利用OpenSees有限元平台,以程潮铁矿西区回采采用的充填开采法为例,模拟了-360m至-500m的水平开采过程;文中还研究了地表沉降在饱和孔隙介质中的响应规律、移动特征和破坏状态,并给出其破坏等级,为地表移动范围的设计提供了依据。
This paper proposes a 3D non-linear model of coupled porous solid liquid and investigates the influences of underground mining on overburden deformation and surface displacements within saturated porous medium. Cut and fill mining activities between - 360 m and - 500 m levels in the west wing of Chengchao Mine are simulated on OPENSEES FEM platform developed by University of California, Berkeley. After response patterns, deformation characteristics and failure mechanism due to surface subsidence within saturated porous medium are evaluated, failure levels are suggested. This provides a fundamental basis for the design of surface displacement.
出处
《有色金属(矿山部分)》
2008年第2期1-4,共4页
NONFERROUS METALS(Mining Section)
基金
湖北省教育厅科学研究项目基金(基金号:D200711002)
关键词
充填法
孔隙介质
固液耦合
有限元
cut and fill mining
porous medium
coupled solid-liquid model
FEM