Method for preparing inter-chamber blocks for extraction

FIELD: mining industry.

SUBSTANCE: method includes extraction of deposit resources by chambers through one of them, construction of ice-rock backfill in extracted space of primary chambers and following extraction of inter-chamber blocks. In inter-chamber blocks wedge-shaped slits are formed immediately in ceiling of deposit, space of slits is filled with ice-rock backfill, while slits are formed of inter-chamber blocks for 1/3 of width.

EFFECT: higher durability, higher effectiveness.

3 dwg

 

The invention relates to the mining industry and is designed to prepare mezhdurebernyh for extraction of pillars in the development of mineral deposits with Laporte bookmark sloping layers.

The known method of preparing mezhdurebernyh pillars to extraction, including mining of ore deposits cameras through one, erection Laporte bookmarks in mined-out space of the primary cells and the subsequent excavation of the secondary chambers mezhdurebernyh pillars [1].

There is also known a method of underground mining in permafrost, including education primary chamber openings, the flow in the chamber filler, binder and cooled air [2].

The main disadvantage of these methods is that due to the pliability ldaprdn supports the main weight of the strata overlying rocks is transferred over hard Mezhdunarodnye pillars and subsequently complicates their recovery.

The technical challenge is to prepare mezhdurebernyh pillars to the notch, which promotes the redistribution of rock pressure on Mezhdunarodnye pillars and loporto tab, which contributes to the stability of mezhdurebernyh pillars and reducing losses of minerals.

The technical result is achieved in that in the method of preparing Marduk the dimensional pillars to the recess, includes mining stocks reservoir chambers through one, erection Laporte bookmarks in mined-out space of primary cells and subsequent extraction mezhdurebernyh pillars, according to the invention, in mezhdurebernyh the pillars form a wedge-shaped slit directly on the roof deposits the entire length of the chambers that fill the space cracks Laporte tab, and cracks form at 1/3 the width of mezhdurebernyh pillars.

Described in the claims the essential characteristic consists in the education mezhdurebernyh the pillars of the wedge-shaped gaps, provides the malleability of the pillars at the stage of practicing primary camera that allows you to reduce the strain from the weight of overlying strata of rocks.

A significant feature expressed in the fact that the wedge-shaped gap is formed directly on the roof deposits on the whole length of the camera, allows you to save the main array mezhdunarodnogo pillar in pristine condition and to ensure the maintenance of the roof at the stage of testing primary cells.

Significant feature - cracks do is wedge-shaped, allows at the stage of excavation secondary cameras the roof to take arched shape, which gives them a more stable condition.

Significant feature - space slots fill Laporte tab, which is more pliable than ore t is lik promotes uniform distribution of ground pressure.

The essential characteristic consists in the fact that cracks form at 1/3 the width of mezhdurebernyh pillars, gives them the necessary flexibility at the stage of testing primary cells and switchtest of crown pillars at the stage of extraction of the secondary chambers.

The method is illustrated by drawings, where figure 1 shows a site plan of mining operations with the chamber filled Laporte tab; figure 2 - a section a-a figure 1 with the filling wedge-shaped cracks in mezhdurebernyh the pillars tab; figure 3 is the same after excavation mezhdurebernyh pillars.

Conventions on the drawings: 1 is the array of minerals; 2 - primary chamber; 3 - Laporte pillars; 4 - Mezhdunarodnye pillars; 5 wedge - shaped slit.

The method is as follows. When mining deposits 1 cameras 2 before filling them Laporte tab 3 in mezhdurebernyh the 4 pillars directly on the roof deposits form a wedge-shaped slit 5 on the whole length of the camera 2. The gap 5 create explosive or mechanical means. Loporto tab 3 created in the wedge-shaped slits 5 erected simultaneously with filling out the space of 2 cameras. As testing chambers 2 and Pomorski backfill array 3 rock pressure, perceived mezhdurebernye the pillars 4, part of the distribution is located on Laporte pillars 3, aided prepared give mezhdurebernyh pillar 4. Thus, Mezhdunarodnye pillars 4 are prepared for their extraction, as the role of the security pillar holding the roof of the reservoir 1, it begins to Laporta tab 3.

The main advantage of this method is safe to remove mezhdurebernyh pillars and reducing the loss of minerals.

Sources of information taken into account when preparing the description of the invention

1. G.P. Nobuto, VP Zubkov, A.F. Mamonov. Underground mining using Laporte bookmarks on the field Badran in Yakutia. Mining information and analytical Bulletin. M., Moscow state mining University, No. 10, 2001, p.71-74.

2. RF patent №2168627, 7 E 21 41/16, 2001. (prototype).

The method of preparation mezhdurebernyh pillars to mining, including mining stocks reservoir chambers through one, erection Laporte bookmarks in mined-out space of primary cells and subsequent extraction mezhdurebernyh pillar, characterized in that mezhdurebernyh the pillars form a wedge-shaped slit directly on the roof deposits the entire length of the chambers that fill the space cracks Laporte tab, and cracks form at 1/3 the width of mezhdurebernyh pillars.



 

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FIELD: mining industry.

SUBSTANCE: method includes preparation and well extraction of resources of chambers with partial backfill of extraction space. Blocks of upper level relatively to blocks of lower level are placed in staggered order, while blocks are made in form of a stretched upwards hexahedron. Resources of block within one hexahedron are separated on two chambers, one of which, placed along periphery of hexahedron, after extraction and removal of ore from it is filled by hardening backfill. Second order chamber is made of hexahedron-like shape, extracted and removed under protection from artificial block on all six sides of this chamber. Removal of ore from first order chambers is performed through one removal mine - end of level ort and cross-cut in lower portion of block and intermediate sub-level cross-cuts.

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FIELD: mining industry.

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EFFECT: higher safety, higher efficiency.

1 dwg

FIELD: mining industry.

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FIELD: mining industry.

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EFFECT: higher efficiency.

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FIELD: mining industry.

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EFFECT: higher durability, higher effectiveness.

3 dwg

FIELD: mining industry.

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EFFECT: simplified construction, lower laboriousness.

2 dwg

Backfill mix // 2270921

FIELD: mining industry, particularly to develop mineral deposit along with backfilling of worked-out areas.

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2 tbl

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