SU1224403A1 - Method of open-cast mining of mineral deposits - Google Patents

Description

The invention relates to the mining industry and can be used in the open pit mining of mineral deposits during internal dumping of the city.

The aim of the invention is to increase the joint stability of the rocks of the inner dump and the lower sub-link of the next scarp along the direction of the front, while reducing the costs of perekkavasch overburden.

The proposed method is as follows.

The upper ledge is divided, for example, into two layers — upper and lower. The temporary dump (predate) is also divided into two layers — the upper and the lower one (the pressure of the predval). First, the dragline works out the upper layer of the scrim of the ledge and part of the upper layer of the precalculation, dumping the rock in the time of the dump. Then, moving to the side of the blade, the dragline re-excavates the rock mass of the upper layer in a permanent position.

After excavation of the upper layer of the mineral fossil by mechlopata, block-cutting of the lower layer of the upper ledge and the base of the prefill along the front of work is performed. First, in the first block, the dragline is made, the excavation of the lower layer of the mineral and its loading are made, for example, on motor vehicles, the movement of which is carried out on the working platform of the dragline. Then, the hearth mass of the lower layer of the opening ledge and the base of the prefix of the next second block, etc., is poured into the developed space of the first block with the same dragline. to complete mining excavation entry.

When working out the entry, various options for organizing work are possible. For example, when working in a single dragline pattern, an excavator is in forward motion: it performs the transshipment of the upper layer of overburden, dumping the track itself. The dragline reversely re-excludes the upper layer and its hook into the upper Russian of the constant blade.

The transition of the excavator from the bottom, the Rus to the upper Russian of the blade is stuck in a dead end on the highway, specially sprinkled with a dragline.

When working out the two draglines, the overburden excavator transmits the upper layer overburden, and the oval excavator re-excavates the upper layer of the overburden and predval. In this case, additional transitions of draglines from the lower rus to the upper rus of the heap are excluded.

The proposed method makes it possible to increase the efficiency of the development system with internal dumping of rocks, reduce the re-excavation coefficient, increase the stability of the slopes of the internal waste dumps, and reduce the loss of mineral resources during transshipment of powerful overburden. So, with an overburden with a capacity of 70 m, using the ES-15/90 draglines

and the angle of incidence of the plates at 12 °, the coefficient of reexcavation during the work according to the proposed technological scheme is reduced by 40% (from 130 to 90%). Decreasing the coexistence factor of the re-exploring is caused by a more complete use of the linear parameters of the draglines — the depth of scoop, the discharge radius, the discharge height, in connection with the placement of the lower layer

overburden

the open space of the block being opened and the redistribution of the volumes of overburden placed in the dump.

The basement of internal dumps due to the placement of part of the open-pitched rocks in the worked-out space of the block being opened allows to significantly increase the stability of the slopes

internal dumps that is quite

important when mining layers useful. fossil with angles of incidence

over 12 °, increase the slope angle of the internal dumps, reduce the volume

re-excavation of rocks, to expand the scope of application of highly economical back-up system when processing layers in complex mining and geological conditions. Stocks of useful

fossil with dip angles greater than 12 are significant. So, only on the existing coal mines of Kuzbass, 30-35% of the area of the deposits is occupied by layers with angles of incidence

12-20:

In addition, the proposed method also solves the problem of open field development by

3 1224403

without transport system on strata of complex hypsometry, reduce

the horizontal occurrence of the plot-part of the opening of the useful arches with the increased power of overburden, forage due to its excavation of the dragline, for example over 50 m, by draglineamine, to carry out selective

medium models ESh-10/60, ESh-10/70, s

ESh-15/90 in conditions of poorly resistant 1 fertile topcoat on

rocks, to reduce the loss of the useful IP surface of the blade, to reduce the volume

digging when mining seam re-excavation of rocks by 50-80%.

Claims (1)

METHOD FOR OPEN DEVELOPMENT OF PLASTIC DEPOSITS OF USEFUL FOSSILS, including mining of the overburden ledge with mines with block mining of overburden rocks of the lower sub-mine, transshipment of overburden rocks into a temporary dump, followed by re-excavation of these rocks into a permanent internal dumping, increase the joint stability of the rocks of the internal dump and the lower sub-step of the overburden ledge following in the direction of the work front while reducing The charge for over-excavation of overburden rocks, block mining of overburden rocks of the lower sub-stage is carried out sequentially along the front of the work with alternating the extraction of minerals of each _{β of the} previous block and dumping into the excavated space of the last overburden of the lower sub-floor of each subsequent block, and the specified overburden overburden is produced from by dumping of the internal dump and the lower sub-step of the overburden ledge. SU „., 1224403>