Abstract:

The orebodies in Pinglidian mining area of Sanshandao gold mine are the quartz vein type gently inclined thin veins.There are many middle rooms underground mining，and the pillar mining method is shallow hole room and pillar method.Since the mine production，the geological reserves are increasingly inadequate as the production scale expands unceasingly.To increase the exploitable mineral resources，the pillar was decided to  be re-explored in the goaf in mining field.After different scheme comparison，the mineral method of the full filling afterwards continuous re-exploitation pillar has been adopted.This method has the advantage of a large amount of filling，safety re-explored and continuous mining.The mining experiment was carried out in Pinglidian mining area used the mining technology，and has obtained a good effect.The stope production capacities reach 20 t/d，and ensure the stable mining production for Pinglidian mining area.

Key words: gently inclined thin veins, pillar re-explored, continuous re-exploitation, mining method