Abstract: Dachang Tin Mine in Guangxi is a major tin industrial base in China and fine vein orebody is one of the main orebodies in Dachang's Tongkengkuang tin deposit. Based on the analysis and research of this orebody, a mathematic-economic model is established by using large geological software Surpac and geological statistic principle, thus providing a basis for the dynamic management of the mine data and a scientific ground for the full and rational utilization of mineral resource.

Key words: Fine vein orebody, Mathematic-economic model