Intercolumn recovery method for overburden reconstruction with waste rock filling in empty area and top surrounding rock caving

Abstract

Provided is a studding recovery method for reconstructing a covering layer through dead zone wastefill and top surrounding rock spallation collaboratively. The method comprises the specific steps that after waste rock is exploited out from a chamber and a top column through an open-stope method, a goaf is filled with the waste rock to reach a certain height, surrounding rock at the top of a studding is collapsed off once, and the studding covering layer is reconstructed collaboratively; the studding is divided into a plurality of layers, and a drilling drift is tunneled in the center of the bottom of the layers; an end non-through cutting groove is formed in the tail end of the drilling drift through a cutting courtyard slot broaching method; the cutting groove serves as the ore breaking free face, and the studding is subjected to sequential top-to-bottom interlamination advance and in-layers retreating type recovery; and broken ore is shoveled to a winze through a scooptram and is conveyed to the surface of the earth by an ore pocket through an electric locomotive. The invention first provides the method for collaboratively reconstructing the studding covering layer, the safety of studding recovery is improved, and the ore recovery rate is increased effectively.

Description

technical field [0001] The invention relates to a method for recovering inter-pillars in underground mining of metal mines, in particular to a method for recovering inter-columns in which waste rock filling in empty areas and surrounding rock caving at the top cooperate to recreate the overburden, and are suitable for surrounding rocks that are more than moderately stable and horizontally inclined Recovery of pillars left by open-field mining of thick-extremely thick ore bodies or steeply inclined thick-extremely thick ore bodies. Background technique [0002] The guiding ideology of the open-pit mining method is to divide the ore block into a mine room and a pillar, and recover it in two steps. For the surrounding rocks with moderately stable surrounding rocks, medium-thick-extremely-thick orebodies with gentle inclines or steeply-inclined thick-extremely thick orebodies, the conventional recovery methods are mainly layered caving method, mass caving method, and medium-thic...

AI Technical Summary

Problems solved by technology

It can overcome the disadvantages of excessively large exposed area of ​​goaf and high ore loss rate caused by conventional recovery methods in the recovery of studs, reduce the exposed area of ​​goafs, reduce the loss of ore, and make goaf treatment and stud recovery organically synergistic , and ultimately achieve safe, efficient, and low-cost recycling of intercolumns

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