Abstract: Building block model is the key problem that should be solved in mine 3D calculation of reserves.Due to such problems as low-efficiency and low-precision using the traditional method, this paper raises the rapidly filled arithmetic of 3D block model by BSP tree structure.This algorithm is adopted to build the magnitude of blocks model under constraint of the complicated ore body and terrain, and it has been successfully used in 3D calculation of reserves in some mine, meanwhile showing the arithmetic is efficient, precise and operable.  

Key words: BSP Tree, Block Model, 3D Calculation of Reserves