Abstract: In order to obtain the information of reserve scope，distribution and development potential of available coal resources，grasp the information of coal resources reserve of mining field productivity construction，plan the mining scheme of mining field，and to provide the reliable guarantee for the sustainable development of coal resources，taking the A₁ coal seam of a mining field of Blikun mining area，Xinjiang as the research example，a new three-dimensional geological modeling and reserve estimation method based on 3DMine software is proposed.Firstly，the geological database is established，the ore-body boundary is delimited and the three-dimensional ore-body model is built based on the existing geological information and drilling data；Secondly，the ore-body model is divided into the discrete block combination models，and the ordinary kriging spatial interpolation method is used to estimate coal resources reserve.The research results show that，the samples' information is considered fully during the process of estimating coal resources reserve based on ordinary kriging spatial interpolation method.Compared with the traditional geological block method，the estimating results by the ordinary kriging spatial interpolation method is more reliable；Besides that，the ordinary kriging spatial interpolation method considers the shape and size of coal samples and spatial structural characteristics between coal samples and the variables such as reserves blocks.Therefore，it can provide some reference for mining design and strategic planning.

Key words: 3Dmine, Geological modeling, Reserve estimation, Geological database, Block combination model, Ordinary kriging spatial interpolation method