SU1448051A1 - Method of mining ore beds - Google Patents

Abstract

The invention relates to mining and m. used in underground mining of mineral deposits. The purpose of the invention is to increase the efficiency of development by reducing the cost of creating a cutting gap and maintaining loading and hauling workings. From the sloping ramp located on the flank of the ore body, the sublevel 1, loading and delivery ones pass. 2 and drilling 3 development. At the end of each subsequent excavation unit, prior to the start of cleaning works, a cutting slot 6 is formed in the previous excavation unit. In the previous excavation unit, broken ore is stored in slot 6 for the period of cleaning work. This massed ore is compacted by blasting layers in the slit 6 of the next excavation unit with the formation of a sub-vertical contact from the compacted ore at the boundary of the excavation units when the broken rock mass is released from the previous excavation unit. After laying the previous extraction unit hardening sfs

Description

g

IV is ff

00

about

SP

SUE discharged zamagazinirovannoy in the slit of ore from the end of the loading and delivery of extractors with a step equal to the width of the notch 5, (pinned vertical layer 4, but the direction of the steering body. 3 Il.

one

The invention relates to mining and can be used in underground mining of mineral deposits primarily in the extraction of valuable ores of medium stability in the host rocks of the same stability and the need to maintain the surface.

The purpose of the invention is to increase the efficiency of development by reducing the cost of creating a cutting gap and maintaining loading and hauling workings.

FIG. I shows a horizontal section along the strike of a part of the ore body being mined; in fig. 2 is a section A-A on FIG. one; FIG. 3 is a section BB in FIG. one.

FIG. I-3 shows: 1 - delivery output; 2- ogruzochno-delivery workings; 3 - drilling development; 4 - vertical layer; 5 - trimming; 6 - cut off the slit; 7 - blast holes in the cutting gap; 8 - backfill array; 9 - ore compacted in the gap; 10 - hardening mixture; 11, - blast holes in the ore mass of the rifle; 12 - ore is repelled; 13 - filling pipeline; 14 - isolating jumpers; 15 - ventilation louvers.

The method is carried out as follows.

From the inclined exit located on the flank of the ore body, sublevel delivery 1, loading and delivery 2 and boring 3 workplaces are made, from which sub-floor continuous mining of the ore body is made by vertical layers 4 of equal thickness, divided by equal cutting width 5 ( Fig. 1 and Fig. 2).

The cut-out slit 6 is formed by blasting holes 7 by contact with a backfill array 8 along the vertical layer 4 along the ore body along the strike of the ore from drilling workings 3 located below and perpendicular to the loading and production workings 2, successively with an advance step equal to at least twice the width of the trimming line 5 in the vertical layer (Fig. 1 and Fig. 2). Continuous clearance of the cut-off slot with a sequential step of advance makes it possible to reduce by several times the penetration rate from

carved insurgents, tdk as in the vertical layer passes only one detachable rising, mine penetration in each trimming, as provided in the prototype. With

This ore in the next slit 6 to be excavated, the prunings 5 are compacted by the explosion of the subsequent rows of wells 7 in the decorated slit 6, which allows in the process of dredging the ore from the pruning 5 to get in the slit 6

close to the vertical wall of compacted ore 9 and prevent the penetration of the bookmark into the cutting slot 6 in the process of feeding the filling (hardening) mixture 10 into the cut-out trim (Fig. 3).

The ore mass of rifle 5 is fenced off to the cutting slot 6, from which the broken compacted ore 9 is preliminarily produced. The ore is fouled off by layers from two to three rows of fan (explosive) wells 11 drilled from loading and hauling workings 2,

used as drilling workings (Fig. 1 and Fig. 2).

Repulsed ore 12 from attachment 5 is produced using self-propelled loading and hauling machines and transported by loading and hauling 2 and hauling 1 mines to the main storey ore passes (Fig. 1).

The arrangement of the drilling workings 3 for shaping the cutting gap 6 below the level of loading and hauling workings 2 makes it possible to eliminate the irregularity of the ore production and delivery horizon and significantly reduce the cost of maintaining this horizon (Fig. 1 and Fig. 2). This is also facilitated by the scheme of face ore production from the cut-in with successive redemption in the backing order of loading and hauling workings 2 (Fig. 1).

The developed space trimming 5 in the vertical layer 4 Lay the hardening mixture 0, transport) through the filling pipe 13, located in the loading and delivery 2 and delivery 1 workings of the upper substage. Preliminary in loading and hauling mines 2 insulating bridges 14 are installed (Fig. 2 and Fig. 3).

In order to improve the ventilation of the sewage treatment plant: downhole loading and hauling excavations 2 as the mills 5 are mined are connected by ventilation slumps 15 to the boring excavation 3, which is also a valve 3

developmental output (Fig. I and Fig. 2). End-to-end ventilation due to obshihigahtny depression reduces the ventilation time compared with the time of ventilation of dead-end workings with ventilation devices used in the prototype method, and increases the time of productive work of loading and hauling machines.

The height of the sub-floor, the parameters of the vertical layers and cuttings, mine workings and drilling and blasting operations are determined by calculations depending on the stability of the ores and host rocks, as well as the strength of the backfill.

Claims (1)

Invention Formula The method of developing ore bodies, including the drilling of drilling and loading and sublevel workings, the formation of a cutting gap at the end of each subsequent excavation unit before the start of cleaning works four peeling off the excavated unit with the storage of broken ore in it, the period of refining work in the previous excavation unit, the release of ore store in the ore slit after laying the previous excavation unit, breaking the ore body into the cutting slot with vertical cut-outs and releasing the broken mountain mass, characterized by in order to increase the efficiency of development by reducing the cost of creating a cut-off slot and maintaining loading and hauling workings, the gas-coated ore in the cut-off slot of each previous excavation by breaking the sealing unit layers in cutting slit cutter unit posleduyu5 conductive with the formation of the densified subvertical contact at the boundary of the excavation of ore units with the release of broken rock mass from the previous cutter unit, and the release is carried out Q from the end of the loading and hauling workings with schagom equal to the width of the trimming. 0 Fig2 6-6 Fig.Z