我国矿产资源的总体特征：单一矿种矿床较少，多为多种有用组份（组成成分）伴生于同一矿体中（可称为伴生矿床），或两种以上的矿种共生在同一地质建造中（可称为共生矿床）；同一矿体或同一地区的矿床往往前后经历多次成矿的地质作用，增加了综(There anre two characteristics of the mineral resources in China. There is little mines with single resource, while most of mines with multi-resources. The same ore or the ore in the same area was influenced by the metallogenic geological processes in several times, which makes the mining the ores complex. Therefore, it has the important sence in doing research on the theory of surface mining the multi-resources.)