Upward filling mining method for layered drift two-step stoping along strike

Abstract

The invention provides an upward filling mining method for layered drift two-step stoping along a strike. The method comprises the following steps: dividing ore blocks along the strike of an ore body, and constructing two central stope connection ways and two two-wing stope connection ways perpendicular to the strike of the ore body; entering the ore body through the central stope connection ways, carrying out one-step stoping on a footwall ore body by adopting a layering method, and carrying out cemented filling after stoping of each layer is completed; and after the stoping for the footwall ore body exceeds predetermined layers of a hanging-wall ore body, carrying out two-step stoping on the hanging-wall ore body through the two-wing stope connection ways, filling a goaf, and completing mining for the ore body. According to the invention, through the mode, the stoping area can be effectively controlled, the closing frequency of accurate mining project and a drift method is reduced, safety production is guaranteed, meanwhile, the problems of low production capacity of ore bodies with the thickness of about 20 m and difficult trolley construction are solved, and a high practical application value is achieved.

Description

technical field [0001] The invention relates to the technical field of filling mining, in particular to a two-step back mining upward filling mining method along a stratified approach along the strike. Background technique [0002] With the advancement of mineral exploration and mining technology, various mining methods have emerged, including open-field mining, caving, and filling mining. Among them, the filling mining method can maximize the recovery of mineral resources and protect the underground and surface environment by filling the goaf with filling materials, and is widely used in the mining of various minerals. At the same time, based on the mining needs of different types of ore bodies, the filling mining method is further divided into layered filling mining method, approach filling mining method, upward filling mining method, and downward filling mining method according to the different mining methods and mining directions of the ore body. How to design the most ...

AI Technical Summary

Problems solved by technology

The footwall ore body is mined in one step by layering method, and after the footwall ore body is mined beyond the hanging wall ore body, the hanging wall ore body is mined in two steps by layering method or approach method, thereby effectively controlling the mining area, reducing the number of closures of mining quasi-engineering and approach method, while ensuring safe production, it also solves the problems of low production capacity of ore bodies around 20m and difficult construction of trolleys

Images