Pillar robbing method of reconstructed artificial stud

Abstract

The invention belongs to the field of underground mining of a metal mine, and discloses a mechanical pillar robbing method of a reconstructed artificial stud through barren rock grouting filling. The method comprises the following steps of: calculating the width and strength of the reconstructed artificial stud according to the ore pillar occurrence condition; finding out the barren rock stockpiling condition on the two sides of the ore pillar by use of a laser scanner, and inducing or forcibly avalanching a dead-zone top plate as required so that the barren rock quantity meets the requirements on the reconstructed artificial stud; constructing a rock drilling ore removal heading on a bottom plate of the ore pillar, drilling grouting holes in the barren rocks on the two sides by a geological drilling rig penetrating through the ore pillar, and grouting the barren rocks on the two sides of the ore pillar by a grouting pump in a multi-pipe continuous grouting manner to construct a reconstructed artificial stud; constructing a return air raise at the inner end of the rock drilling ore removal heading, expanding the return air raise into a cutting vertical slot, and drilling upward sector-shaped blast holes in V-shaped arrangement in the rock drilling ore removal heading; performing ore break by blasting of the whole ore wall and backward stoping; and performing ore removal of the ores outside the safe distance by use of a remote control mining robot, and breaking big ores by a hydraulic breaker of the remote control mining robot. The method provided by the invention has the characteristics of mechanical operation, safety and reliability, low mining depletion loss ratio and the like.

Description

technical field [0001] The invention belongs to the field of underground mining of metal mines, and is a mining method for ore pillar resources. It is mainly applicable to the mining of ore pillars whose surrounding stopes have collapsed or been filled with waste rocks, and is also suitable for mining with induced or forced release. The mining of the ore pillar with the top condition is also applicable to the corner residual ore around the goaf that has been filled with waste rock. Background technique [0002] After decades of large-scale traditional mining of metal mines in my country, while mining a large amount of ore resources, it also leaves a lot of residual ore resources, among which the "three pillars" (top pillar, bottom pillar, and inter-pillar) resources And corner ore accounted for the largest proportion. Due to the limitation of the ore value, mining technology and equipment level at that time, this part of the residual ore resource mining area cannot be mined ...

AI Technical Summary

Problems solved by technology

The first method needs to be operated in the empty area, which has great potential safety hazards, high ore loss and dilution rate, and is only suitable for the recovery of residual ore pillars of thin ore bodies, and the mining cost is high; the problems of the second method are: , the thickness of the ore wall is difficult to determine, and its stability is unreliable, and it is difficult to guarantee the role of supporting and controlling the roof of the stope. On the other hand, this method has a large loss rate and is generally only suitable for the recovery of thin ore bodies and pillars.

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