Abstract: The divide of exploration stage have to take notice of the different geological feature and different demand of development of all kinds of minerals. 1. Either the experience of coal exploration or the current requirement, the stage of coal searching （preliminary prospecting） is indispensable. 2. The "preliminary exploration" of unified divide is not corresponding with the "preliminary exploration" of the general rules of coal exploration. 3. The geological data as a result of detailed exploration for mine planning may have three cases owing to the different condition of geological setting. Detailed exploration must obtained reserve A. If only reserve B or reserve C are obtained, it named "perliminary exploration（final）" or "detailed prospecting（final）". They have the different usage and are no good to use the same term "exploration".