关键词: 充填采矿法, 接顶问题, 砂浆自然安息角法, 顶板围岩, 倒立喇叭口

Abstract: During the mining process with upward horizontal slicing and cemented stowing method in multi-metal contact zone sulfide ore body of high quality，high value，high sulfur combustion characteristics and gently dipping medium thickness，the traditional floor-contact methods，artificial floor-contact and slurry pressurized floor-contact，are not applicable.In order to solve this problem，a floor-contact method-“mortar nature angle of repose method” is designed by using nature angle of repose of stowing material which had flowed in gob.Three floor-contact methods with the aid of inverted bell-mouth or stowing small rise are proposed to realize the floor-contact under three deferent conditions.First，the roof surrounding rock of ore body is horizontal or nearly; Second，the roof surrounding rock on one side of filling filter well is higher than that on the other side（the dip angle is greater than 6°); Third，the roof surrounding rock on one side of stowing filter well is lower than that on the other side.This method sets a good example for the mine with stowing method.

Key words: Stowing method, Floor-contact problem, Mortar nature angle of repose method, Roof surrounding rock, Inverted bell-mouth