RU2261993C1 - Inclined deposit development method - Google Patents

Abstract

FIELD: mining industry, particularly for underground ore deposit mining.

SUBSTANCE: method involves mining the deposit by rooms in which raise drills are bored; drilling wells arranged in fan-like array and cutting mineral. Raise drill is deepened in lower wall rock and bottom thereof is covered with metal sheets. Ore is cut in parts simultaneously with rock excavation in the range from raise drill ground to room ground at original ore mass slope angle.

EFFECT: increased cutting intensity, reduced ore losses in lower wall rock at room fender due to impoverishment thereof.

3 dwg

Description

The invention relates to the mining industry and can be used in the development of oblique deposits.

There is a method of developing inclined ore deposits by a chamber-pillar system in which, in addition to the main bottom, a series of ducts and funnels pass in the lying side (see, for example, A.A. Fatkulin, E.E. Markov, A.V. Andreev. Improving the development ore deposits, Vladivostok: Publishing House of the Far East State University, 1991, 187 pp., Fig. 2.14. A variant of the chamber-pillar system for the development of an inclined deposit with bottom ore output, p.126). In addition to the dyuches and funnels, a field drift is carried out along the rocks of the lying side, from which races pass under each camera. From races under each duchka there are rebels, through which the ore beaten in the chamber is transferred to the race, and then transported to the drift on arrival. The disadvantages of this method: a large amount of very laborious mining and preparatory work on the rocks of the lying side, the low intensity of preparation and mining of the block, as well as large losses and dilution of ore.

There is also a known method of developing oblique deposits, adopted as a prototype (see, for example, M.I. Agoshkov, G.M. Malakhov. Underground mining of ore deposits. M: Nedra, 1966, 663 pp., Fig. 141. Chamber -pillar development system, p. 285), in which the development of deposits with a thickness of 6-12 m, occurring at an incidence angle of 30-35 °, is carried out with panels 12-15 m wide, in each of which there is a drilling uprising, buried in soil rocks on 0.3-0.5 m for the convenience of drilling wells in contact with the lying side. Drilling uprising is located either in the center or on the flank of the panel. Ore breakdown is carried out by fans of wells with layers of 1.7-1.8 m thick. To ensure explosion delivery, the specific explosive consumption for breakdown was increased by 1.5 times in comparison with the usual version of the chamber-pillar system. The disadvantages of the method: large losses of beaten ore on the soil of the chambers and cost overruns for drilling and blasting in the chamber by 1.5 times, the inability to use at incidence angles of less than 30%.

The invention is aimed at increasing the intensity of preparation and mining of reserves, increasing the completeness of ore extraction and reducing its dilution, as well as reducing the volume of labor-intensive mining and preparatory work, reducing the cost of breaking and transporting ore in the working face.

The above technical result is achieved due to the fact that in the method of developing oblique deposits, including the development of deposits by cameras in which drilling risers are drilled, drilling fans from the risers and subsequent breaking of the mineral, the drilling risers are buried in the rocks of the lying side, on the soil metal sheets are laid on the drilling uprising, then the ore is beaten in parts and at the same time the rocks are taken out from the uprising soil to the chamber soil at an angle of repose and ore mass.

The invention is presented in the drawings,

figure 1 - projection on the horizontal plane of the chamber system development,

figure 2 is a vertical section along the line I-I,

figure 3 is a vertical section along the line II-II.

The method is as follows. The development of deposits is carried out by panels, the panels are divided into smaller parts - cameras. The direction of panel mining is from top to bottom, which allows for partial extraction of ore from inter-panel pillars. In each chamber 1 of stable sizes, after carrying out a rolling drift and races from it, a riser 2 is carried out under each chamber with some optimal penetration of 3 into the rocks of the lying side, on the soil of which metal sheets are laid 4. The sheets are laid from the bottom up with a slight overlap to prevent their wrapping. Ore breaking in the chambers is carried out by fans of boreholes 5 drilled from the uprising, while ore is beaten in parts and at the same time the rocks are taken from the uprising soil to the chamber soil at an angle of repose of the ore mass. Delivery is carried out by gravity through the sheets to the place of loading, then using self-propelled equipment, ore is transported through an intermediate unit 6 to the haul-off drift 7. After the chamber reserves are removed, part of the inter-chamber pillar reserves is drilled and exploded onto the sheets by which it is delivered to the loading place.

Drill risers in each chamber of the panel are buried to the optimum depth, since with excessive deepening of the drill riser and implementation of chamfering, dilution increases, and with insufficient deepening, the losses of the broken ore mass on the soil of the chambers from the pillars increase.

It is possible to choose the optimal depth of drilling of the drilling uprising in the chambers of the panel, which ensures a minimum of losses and dilution of the ore.

In particular, the amount of penetration can be determined from the condition

и

- потери и разубоживание руды при отбойке в камере, доли ед.;Where

and

- loss and dilution of ore during blasting in the chamber, fractions of a unit;

- потери отбитой руды на почве камеры у междукамерных целиков, доли ед.;

- loss of beaten ore on the soil of the chamber in the inter-chamber pillars, share of units;

- коэффициент разрыхления теряемой отбитой руды;

- coefficient of loosening of lost beaten ore;

- величина дополнительного разубоживания из-за прихвата пород от заглубления восстающего и раскоски почвы камеры, доли ед.;

- the amount of additional dilution due to the sticking of rocks from the deepening of the uprising and slanting of the soil chamber, the proportion of units;

и

- извлекаемая ценность добываемой рудной массы и затраты на ее добычу и переработку.

and

- the recoverable value of the extracted ore mass and the costs of its extraction and processing.

The values included in the condition are determined for different depths of the soil that rises in the soil and chambers of the soil in the chamber.

The advantages of this option: a sharp decrease in the volume of preparatory and cutting work on rocks, an increase in the intensity of preparation and mining of blocks, a decrease in the cost of breaking and transporting ore, a decrease in ore losses on the lying side, an extension of the scope of the method with dip angles of up to 20 °.

Claims (1)

A method for developing oblique deposits, including mining the chambers in which drilling insurrections are carried out, drilling fans from the insurgents and subsequent breaking of the minerals, characterized in that the drilling insurrection is carried out with deepening in the rocks of the lying side, metal sheets are laid on the soil of the drilling insurrection, then ore is beaten in parts and at the same time the rocks are taken out from the soil of the chamber rising to the soil at an angle of repose of the ore mass.

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