The way to re-dredging development placer

 

The invention relates to the mining industry and can be used in the development of resources placers worked previously dredging method. The way to re-dredging development placer involves removal of the upper layers of the placers in the blade and joint dredging of the remaining man-made layers with layers prilotkovoj zone. According to the vertical limit of the content of useful component in rock mass produce separation placer on conforming and non-conforming layers, removing the last external piles, excavation and preexcavation conforming pebble-evalnih layers are initially in the interim and then permanent mound, located on the conforming layer in prilotkovoj zone for subsequent joint dredging. As a result of increased content of extracted component in DragonWave rock mass. 3 C.p. f-crystals, 4 Il., table 1.

The invention relates to the mining industry and can be used in the development of resources placers worked previously dredging method, floating mining machines, such as dredges, and Stripping technique, for example walking the Noah mass with subsequent storage pebbly layers in the pile adjacent to the industrial Board, and evalnih to the outside [1].

This method does not provide selective extraction of enriched layers of the blade due to gross dredging all layers and is associated with a large dilution of the mineral.

There are also known ways of re-dredging development placers using drag and excavating equipment, where after testing each section of the field on the acoustic fields in the dumps again working Gale-evalnih layers produce the removal of peat from the next site [2, 3].

The disadvantage of these methods is gross dredging of conforming and non-conforming layers pebble-evalnih dumps, which dramatically reduces the content of useful components in the leached rock mass, increases technological losses of gold and makes re-development placers generally unprofitable.

The closest in technical essence and the achieved result is a way of re-dredging the development of technogenic placers, including the removal of the upper layers in the blade and joint dredging remaining anthropogenic layers together with priportovym layer [4]. This method is adopted for the prototype of the claimed invention.

The disadvantage of the prototype is the investment evalnih layers, consisting mainly of waste rock.

The invention is aimed at improving the content of extracted component in DragonWave rock mass.

The technical result is achieved by dividing the pebble-efilego blade on conforming and non-conforming layers, removing the last to external dumps, and conditioned - initially in the interim and then permanent mound with its placement in prilotkovoj area placers for subsequent joint dredging with priportovym layer. While conforming pebble-Eveline layers are mixed and loosened during excavation and preexcavation, pre-drained scattering of deep water. The formation constant of the mound produced during the positive external air temperature, and removal of nonconforming layers in the blade - year-round.

The proposed method is illustrated by drawings, where Fig.1 shows the original cross-section of placer, waste before the dredge the two passages; Fig. 2 - state placer after removal of substandard top shingle layer; Fig.3 - induced scattering after preexcavation conforming pebble-efilego layer and removal of the blade efilego is authorized to dredging.

In the drawings shown substandard pebble layers 1, conforming pebble-Eveline layers 2, substandard Eveline layers 3, conforming layers 4 prilotkovoj area placers, Avelino-silt fraction 5 and blade 6. External dumps 7 substandard pebble layers and external dumps 8 substandard evalnih layers placed on the sides of the placers. Intermediate mound 9 conforming pebble-evalnih layers is conditioned on the pebble-Evelina layer based on substandard athelny layer. Permanent mound 10 pebble-evalnih conforming layers placed on privatecom the conforming layer. The drawings show a 0, I, II, III, IV - sequential moves Stripping equipment such as dragline, in the process of implementing the claimed invention.

The method is as follows. According to the vertical limit of the content of extracted component, such as gold, rock mass pebble-athelny the blade is divided into conforming, for example gold, pebble-Eveline layers 2 and substandard pebble 1 and Eveline layers 3, and the conforming layers 4 in prilotkovoj zone. 0 the first course of the dragline is draining placer deep lowering of the water level due to R is th distance from the goaf (Fig.1). Longitudinal return passages I and II dragline removes substandard pebble layers 1 to their placement in external dumps 7 on the sides of the placers (Fig.2). Course III in the first half of the placers of the dragline produces a recess conforming pebble-efilego layer 2 with its storage in the intermediate mound 9, located on the conforming pebble-Evelina layer 2, based on substandard athelny layer 3 in the second half of the deposits (Fig.3). This course dragline removes the first half of the placers substandard athelny layer 3 with its storage in the external dump 8 (Fig.3). Course IV dragline shall preexcavation intermediate mounds 9 and handling conforming mixed and loosened shingle-evalnih layers 2 and priportovogo conforming layer 4 from the second half of the placers in the first with the creation of a permanent embankment 10, located on the conforming layer 4 in the first half of prilotkovoj zone (Fig.4). This course dragline produces destruction of the second half of placer substandard efilego layer 3 and its placement in the blade 8. At low power, dredging spoil preparation placers can be carried out in three moves with combining operations 0 and I and also II and III moves. Prepared IBEC's direct preexcavation, concentrated in the permanent embankment 10, are processed dredge together with the conforming layer 4 located in prilotkovoj area placers (Fig.4).

To avoid freezing, causing loss of extracted component, the formation of a permanent mound 10 is performed in the period of positive temperatures. Remove substandard pebble layers 1 and evalnih layer 3 is produced year-round.

An example of induced scattering deep after dredging development of two moves again developed a 380-liter dredge MD-431 and excavator-dragline ESH 20.90. Initially, according to the vertical limit of the content of gold in the rock mass pebble-athelny the blade is divided (contrived) conditioned on 2, 4 and substandard layers 1, 3 .

To exclude irrational underwater excavation of rocks, providing high-quality mixing and loosening gold pebble-evalnih layers in preparation for dredging and removal of substandard evalnih layers pre-zero the course of dragline - 0 is draining placer deep dewatering by clearing one of the dredging sinuses to raft with storage Avelino-silt fraction 5 in the blade is ain reveals substandard pebble layers 1 with placing them in external dumps 7. The course IIl dragline shall collect gold pebble-efilego layer 2 with storage in the intermediate mound 9 gold pebble-athelny layer in the second half of the placers. This course dragline produces destruction of the first half of the deposits underlying substandard efilego layer 3 with storage in an external blade 8. Course IV dragline shall preexcavation mounds 9 and the underlying gold mixed and loosened shingle-evalnih layers 2 and priplatkovych conforming layer 4 of the second half of the placers in constant internal mound 10 up on gold Evelina layer 4 in the first half of the placers. This course dragline produces destruction of the second half of placer substandard efilego layer 3 by placing it in the outer blade 8 on Board placers. This is followed by extraction of priportovogo layer 4 by stacking layers in a permanent mound 10.

Prepared for the dredging of gold pebble-Eveline layers 2 (qualitatively mixed together, well loosened when preexcavation concentrated in a single space) together with gold platinovym conforming layer 4 are processed dredge single move.

For iscleared positive temperatures.

The expected annual economic efficiency from the future implementation of the proposed method are presented in the table.

The calculation is made according to [5-8] in the prices of the years 1975-1978. Considering prices 2001 annual economic effect will be eg= Kp320000 = 20320000 = 6400000 RUB, where KP is the conversion factor prices 1975-1978 years in the rates of 2001.

Sources of information 1. A. c. The USSR 1694901, MKI5E 21 41/30. The method of dredging placer developments /A. N. Makhnev and B. L. Thalhimer, 4460433/03 declared 13.07.88, publ. 30.11.91, BI 44.

2. A. C. the USSR 1097797, MKI3E 21 45/00, E 21 41/00. The way to develop the fields in terms of re-dredging. Century Century Chemezov, 3560964/22-03 declared 10.01.83, publ. 15.06.84, BI 22.

3. A. C. the USSR 1263849, MKI4E 21 41/00, E 21 45/00. The way to develop the fields in terms of re-dredging. Century Century Chemezov, 3846512/22-03 declared 17.01.85, publ. 15.10.86, BI 38.

4. Bogdanovich Century A. To the question of the distribution of gold dredging in the dumps. -Kolyma, 1974, 7, S. 45 and 46.

Claims

1. The way to re-dredging the development of technogenic placers, including the removal of the upper layers of the placers in the blade and joint dredging remaining Thea useful component in the rock mass produce separation placer on conforming and non-conforming layers, removing the last to external dumps, excavation and preexcavation conforming pebble-evalnih layers are initially in the interim and then permanent mound, located on the conforming layer in prilotkovoj zone for subsequent joint dredging.

2. The method according to p. 1, characterized in that the recess and preexcavation conforming pebble-evalnih layers produced their mixing and loosening.

3. The method according to p. 2, characterized in that before mixing and loosening the conforming layers dry placer deep dewatering by clearing one of the dredging of the sinuses to the raft.

4. The method according to p. 1, characterized in that the formation constant of the mound produced during the positive external air temperature, and removal of nonconforming layers in the blade - year-round.

 

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