Abstract: To analyze the mining disturbance influence scope in underground metal mine and its influence degree on ground structures more reasonably and quantitatively, combined with engineering practice in Hualinggou iron mine, we proposed that using Micromine to create true three-dimensional geological model in this paper, using hexahedral discrete technology to mesh the corresponding geological model, and using coupling technology and C language to reconstruct the numerical model in FLAC3D. On this basis, we analysed the influence scope of underground mining disturbance and its influence degree on ground tailings dam. The results show that, first, using coupling technology can create more complex three-dimensional geological model. Second, using numerical calculation method can delineate mining influence scope accurately. Finally, using this technology can analyze underground mining disturbance influence on ground structures in the quantitative view.

Key words: geological modelling, hexahedral discrete, mining disturbance, coupling technology, numerical simulation, security and stability of ground structures