Abstract: To achieve the safe withdraw of NO. 3207 large-mining-height working face in Huoerxinhe mine at the situation of soft coal seam and complex geological conditions ,it is determined not to reduce the mining height ,and withdraw the face enquipments in the way of making insant dismantle roadway.The reasonable position of the roadway is determined in the base of analyzing the preserving of neighboring main roadway protective piller ,the limit of equipment size,and the mine pressure behave law during the late mining.The reasonable roadway section size is obtained by geometric calculation of the process of hydraulic support recovering. By reforming the process of the network linking and mining technology,a series of support technology suitable for 5.0m large-vertical height dismantle roadway is created.

Key words: soft-coal seam, large-mining-height fully-mechanized, large-vertical height, instant withdrawing