Downward Horizontal Layered Dry Fill Mining Method

Abstract

The invention relates to a mining method. The stoping sequence of the mining method is that layers are turned from top to bottom; each stoping layer is 2-2.2m; the bottoms of the stoping layers are filled with materials; mining and filling are performed simultaneously in the stoping process; the filling layer is taken as the roof of the next stoping layer; a working face is advanced from the roof to the floor; in the process of production, the maximal roof control distance of the stoping working face is 3.2m and the minimal roof control distance is 2.2m; one or two reinforced concrete water-resisting layers are arranged on each stoping layer; the water-resisting layers tilt to one side and drain water to a water sump at the next layer and water is drained out of a mine by a drainage system of the mine. By adopting the method, the traditional mining technology is changed. The downward horizontal-slice dry-type filling mining method has the advantages of improvement of stoping efficiency, simultaneousness in mining and filling, full utilization of wastes which are generated in the process of mining and smelting, lessened pollution of discharged pollutants to the environment, reduction of land occupation and basic eradication of roof fall accidents.

Description

technical field [0001] The invention relates to a mining method, in particular to a downward horizontal layered dry filling mining method with high mining efficiency, which can effectively prevent spontaneous combustion and fire in goafs, and simultaneously avoid surface subsidence. Background technique [0002] The filling mining method belongs to the artificial support mining method. In the mine room or ore block, as the mining face advances, the filling material is sent to the goaf to manage the ground pressure, control the collapse of the surrounding rock and the movement of the ground surface, and protect the formed filling body down for recovery. This law is applicable to the mining of high-grade, scarce and valuable ore bodies with unstable surrounding rocks, where the ground surface does not allow subsidence, and the mining conditions are complex, such as water bodies, railway trunk lines, ore bodies under major buildings, and mines with the risk of spontaneous comb...

AI Technical Summary

Problems solved by technology

[0007] What the present invention aims to solve is the problem that the existing upward layered filling method causes the roof melt of the stope to collapse, and there is sometimes a small area of ​​ground subsidence above the goaf. Downward horizontal layered dry filling mining method to avoid surface subsidence