Abstract:

The basic principle and method of optimizing the exploration grid with geostatistics methods are discussed.Taking Jiaojia gold mine for an example，using SURPAC software establishes the gold deposits three-dimensional models，combining with sample data of drilling and groove，using the ordinary kriging methods to estimates gold grade valuation and reserve.Orebody spacing occurrence and ore grade distributions are showed visually，and their variation laws are analyzed and evaluated.Optimum exploration grid is simulated according to valuation variance function of exploration grid and mesh configuration.These methods are applied actually in the middle of the deep mines，and provide reliable geologic information for mining design.

Key words: Surpac platform, geostatistics, three-dimensional deposit model, exploratory grid, variogram