SU403853A1 - '-' "- INVENTIONS - Google Patents

Description

one

The invention relates to the mining industry and may be used for the development of mosh ore deposits.

The known method does not allow for the safe mining of powerful ore deposits, since the presence of people in the chambers is necessary.

The proposed method allows to reduce losses when carrying out the upper and lower hooking.

To do this, ore is produced through the side of the chambers, with some of the supporting ore pillars between the undercut workings being extinguished at the same time as the ore is crushed in the chambers, and the rest of the pillars, together with artificially constructed bridges, isolate the developed space for sectional laying them with hardening material.

FIG. 1 shows a diagram of the workings; in fig. 2 is a longitudinal section of the section during the blasting and production of ore; in fig. 3 - the same cross section.

The developed section of the deposit is divided into sections 1. Preparatory drifts 2 pass along the border of the section in the soil and the top of the deposit, and of them are subsurface mines 3. Belt pillars 4 are left at the boundaries and inside sections 4. The plot is developed stepwise along the sewage front notch chambers 5. Length of chambers

corresponds to the width of the sections. The ore blasting is carried out by blasting wells 6 at the cutting slot 7 located at the boundary of the section from the side of the ore massif.

To protect the bookmark from destruction, the breaking is conducted along the chamber, and from the side of the backfill array, an ore crust is left, which, as it is exposed, is collapsed from the seismic effect of explosions.

Repulsed ore is released to the lower subsiding openings through the side of the chambers from under the ore visor 8, loaded with loading machines into the wagons and delivered to the ore pass. At the same time, part of the pillars are repaid simultaneously with the blasting and release of ore from the chambers, and the rest with additional installation of shields or bridges of broken ore 9, isolate the used chamber for subsequent laying with hardening material 10. The laying is fed through pipes that are laid from the surface along the well , and further along the upper notched cuttings.

As a filling material may

Low-strength hardening mixtures such as tailings or crushed material with the addition of clay, ground slag, lime or cement should be used. A continuous production process is achieved by sequentially alternating operations in sections. how

As a rule, in one of the sections ore is drilled and crushed, in the other - output, in the third - backfilling, and in the fourth work they do not lead, as a hardening tab is gaining strength in it.

The time of one cycle in the extraction of ore in three sections, corresponding to the hardening time of the bookmark, depends on the thickness of the deposit, the width of the layer to be removed and ranges from one to three months.

After the chambers are worked out in all four sections, the next row of chambers is prepared for excavation, while the slit workings within the working area can be completed immediately or gradually as the work front progresses.

Subject invention

The method of developing powerful ore deposits with continuous ore excavation by stepped chambers followed by their laying, characterized in that, in order to reduce losses when conducting the upper and lower cuttings, the ore is produced through the side of the chambers, and

supporting ore pillars between undercut mines are absorbed simultaneously with ore blasting in the chambers, and the remaining pillars with artificially constructed bridges isolate the developed space for sectional laying them with hardening material.

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iO FIG. 2

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