Sublevel open-stop and delayed filling mining method

Abstract

The invention relates to a sublevel open-stop and delayed filling mining method. According to the method, cutting crosscuts are wholly undercut along the width of chambers and pillars so that the space of scope rock drilling is shared with ore drawing, drilling operations of vertical parallel blast holes are achieved in undercutting space, positioning accuracy of drilling the vertical parallel blast holes is high, the intervals among the blast holes are even, and the defect of high blasting boulder yield caused by drilling sector blast holes in traditional rock drilling cross cuts is avoided; during chamber (or pillar) scoping, driving of ore drawing gateways and ore drawing admission passages in fill materials of adjacent pillars (or chambers) isn't needed, and accordingly the safety is improved; simultaneously, ores are directly drawn from the undercutting space of the chambers and the pillars, the space of ore drawing is large, mutual interference is small, ore drawing efficiency is high, and ores are drawn completely without any dead space and secondary ore loss; artificial sill pillars are constructed, ore sill plates aren't needed to be reserved, the ores are free of primary loss, and the rate of resource recycling is high. Barren rocks and ore beneficiation tailings are used for filling gobs, the barren rocks are not taken out of pits, constructions of tailing dams and barren rock yards are reduced, and land occupation is small.

Description

technical field [0001] The invention belongs to the technical field of mining underground metal mines, and in particular relates to a segmented empty field followed by filling mining method, which can be used for underground medium-steady or above, inclined and steeply inclined thick and extremely thick ore bodies, and steeply inclined parallel extremely thin ore veins. Safe and efficient mining of fine ore belts. Background technique [0002] At present, in the mining of inclined and sharply inclined ore bodies with moderately stable ore and surrounding rocks, the segmented open-stop and then-fill mining method is widely used. This method is developed on the basis of the original empty field method and filling method. It combines the advantages of the empty field method and the filling method. , and then carry out cemented filling to the mined-out area. When filling, the lower part is filled with high lime-sand ratio, and the upper part is cemented with low lime-sand ratio...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for overcoming the existing sectional empty space and subsequent filling mining method, which requires driving into the ore-exiting horizontal roadway and the ore-exiting roadway from the filling false column, and the excavation and ore-exiting operations are unsafe and the excavation efficiency is low; The cutting workload is heavy, the accuracy of the fan-shaped blast holes is difficult to control, and the large block rate is high; the ore discharge is disturbed, the ore is not clean, and there is a secondary ore loss; the ore floor is reserved, it is difficult to recycle, and there is a resource loss and other shortcomings. Segmented Empty Stop Subsequent Differential Filling Mining Method with Large Bottom Section

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