Continuous mining method suitable for high-middle section

Abstract

The invention provides a continuous mining method suitable for a high-middle section. The method comprises the steps of S1, a stope preparation project and S2, a back production project. The stope preparation project comprises the steps that S101, a high-middle section stope is divided into a plurality of layered stopes; S102, an out-of-vein roadway is tunneled along the trend on the lower plate of the ore body, and then a sectional flat roadway and a stope connected roadway are tunneled, wherein the central line of the stope connected roadway is perpendicular to the central line of the corresponding layered stope; S103, a filling return air service raise is arranged and communicates with the out-of-vein roadway, the sectional flat roadway and the stope connected roadway; a waste stone chute and an ore chute are respectively arranged; and S104, a bottom pillar is not left in the high-middle section stope, a bottom-pulling roadway is directly tunneled at the upper part of a bottom plate, the bottom-pulling roadway is expanded to the boundary of a mine room by taking the bottom-pulling roadway as a free surface, a bottom-pulling space is formed, top-lifting mining is performed upwards, and mined ore is transported away. In the back production project, the stope with relatively stable rock conditions adopts an upward horizontal layering filling mining method, and the stope with relatively broken rock condition adopts an upward horizontal drift filling mining method. The method can effectively improve the back production strength and the ore drawing efficiency of the thin ore body.

Description

technical field [0001] The invention relates to the field of mining technology, in particular to a continuous mining method suitable for high and middle sections, wherein the high and middle sections refer to stopes with a middle section height of 80 meters to 150 meters. Background technique [0002] Steeply inclined thin ore bodies usually refer to ore bodies with a dip angle greater than 55° and an ore body thickness less than 4m. At present, the main mining methods of steeply inclined thin ore bodies are shallow hole retention method and wall cutting and filling method. The shallow hole retention method requires that the thickness of the ore body is not greater than 4m, the inclination angle is above 55°, the ore rock is stable, and the occurrence is single. It is a mining method that is more suitable for small-scale mine mining; In the dry filling method, the surrounding rock and ore are collapsed during the mining process, and the mined ore is released through the sli...

AI Technical Summary

Problems solved by technology

However, the mining intensity of these two steeply inclined thin ore body mining methods is low, the ore recovery efficiency is low, and continuous mining cannot be carried out in the stope, and the ore selection grade is low, and the ore loss rate and dilution rate are relatively large, which greatly reduces the mine. economic benefits

Images