上向分层充填法采矿的数值模拟研究  被引量:5

Numerical Simulation on Upward Sublevel Filling Method

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作  者:胡丽珍[1] 李云安[1] 雷银[1] 王钦刚[1] 王伟[1] 刘莎[1] 

机构地区:[1]中国地质大学工程学院,湖北武汉430070

出  处:《金属矿山》2014年第1期5-8,共4页Metal Mine

摘  要:为了科学地评价矿区在水岩耦合条件下采矿过程中的矿柱稳定性以及地面沉降问题,避免工程经验类比法的不确定性和随意性,在工程地质勘察以及岩体物理力学试验的基础上,运用应力和位移的统一场理论,以司家营铁矿为工程背景,利用矿段的工程地质剖面图,在有限元数值分析软件ANSYS中建立精细的三维数值计算模型,导入FLAC3D数值模拟软件进行矿区在水岩耦合条件下的数值模拟,最后获得地表沉降云图、矿柱的应力云图以及渗流场的矢量分布图。在此基础上对矿山开挖过程中的地面位移、矿柱应力和渗流场的分布特征进行了分析,对上覆岩层及地表变形和矿柱承受的应力状况进行预测。最终成果不仅可以对现阶段矿山的开采过程提供一定的科学依据,同时对矿山的安全生产具有重要的指导意义。In order to make a scientific evaluation of pillar stability and ground subsidence in the mining area under the condition of water-rock coupling in the process of mining, the uncertainty and randomness of engineering experience analogy method should be avoided. On the basis of engineering geological investigation, as well as physical and mechanical test of rock mass, applying the theory of the unity of the stress and displacement field, with the engineering background of Sijiaying iron ore,the engineering geological profile of ore block is used to establish fine 3D numerical model in the finite element numerical analysis software ANSYS. It imports the FLAC3D numerical simulation software for numerical simulation of the mine under the condition of the coupling. Finally the surface subsidence maps, the pillar stress cloud maps and the vector distribution of the seepage field were obtained. On the basis of this, the ground displacement, pillar stress and seepage field distribution character- istics in the process of mining excavation, are analyzed to predict deformation of overburden and surface, and the stress of pil- lar. Final results can not only provide certain scientific basis for mine mining process at present stage, and also has an important guiding significance for mine safety in production.

关 键 词:上向分层充填法 数值模拟 矿柱稳定性 地面沉降 水岩耦合 

分 类 号:TD853.343[矿业工程—金属矿开采]

 

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