Water supply for dredging

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in dredging of valley and floodplain detritus. This method comprises construction of stream diversion channel, service pool for dredge and system of water treatment plants. Stream diversion channel is composed by natural bed in drag bank made at working the deposit in lengthwise direction with earth prism filling to inner slope of dredge bank. Extraction of mineral during stream diversion channel is carried out by asymmetric manoeuvring of dredge to ensure maximum cross-section area of dredge bank. Water level in service pool and water treatment plats is kept level with stream diversion channel water horizon.

EFFECT: higher environmental safety, decreased scope of works.

3 cl, 2 dwg

 

The invention relates to the mining industry and can be used in dredging the development of the valley and alluvial placers.

The invention is directed to improving the environmental cleanliness of mining operations and the establishment of effective dredging technology development placers.

Currently from placer deposits in Russia produced almost 30% of the gold. The share of dredging method development placers though reduced, but remains significant (>50%). The main reserves of sand placer deposits are concentrated in the valley and alluvial placers, having a sufficiently large width. Practicing these placers is a transverse, longitudinal-transverse and spiral passages drag. Water dredging work is performed primarily in closed or working schemes with wastewater in lagoons, created in the developed space.

The issues of enhancing the safety of mining operations currently very relevant and included in the list of priority directions of development of science and technology. The claimed method relates to the priority areas of "Technology of reducing the risk and consequences of natural and man-made disasters" and "Technology of environmentally safe mining and mining" [Alphabetical subject index to International the th patent classification in priority directions of development of science and technology / Ugino, Eviscerate, Sagranov. - M.: PATENT, 2008. - p.65, 110].

There is a method of recycling water supply dredging works, including the construction of russiatoday, the creation of technological reservoir and sump [Lichev V.R., Asinovsky L.N., Chikin, Y.M. Guide the selection and design of water supply systems, sewage and water treatment methods in the development of alluvial deposits. - Irkutsk, 1990. - P.24-25].

General characteristics similar to the claimed technical solution is the construction of russiatoday, the creation of process water and wastewater treatment facilities.

The disadvantage of analog is the need for the construction of russiatoday outside contour of stocks that leads, first, to increase the area of land allocations, secondly, requires significant additional costs, third, often leads to the rise of the bed of the river on the floodplain and significant seepage diversion of surface waters, including in direction of the drag section. And finally after completion of mining operations must work to restore the river channel, as nucleotomy on the ridges (slopes) are temporary structures and remediation must be filling.

There is a method of closed-loop supply with the creation of longitudinal dams embankment for insulation of process water and wastewater treatment. is from surface water [Leshkov VG Development of placer deposits. - M.: Izd-vo Mining book, 2007. - S-606, is, in].

General characteristics similar to the claimed technical solution is the abstraction of surface water from the area of the dredging works, the creation of process water and wastewater treatment facilities.

The disadvantages are the counterpart for the extra costs of landfilling floodwalls, increasing the area of land allocations, significant seepage leaks either from the river or from process water and wastewater treatment facilities, and finally the need for stream restoration in the reclamation process.

For the prototype accepted way of a closed water dredging works with carrying out river bed diversion channel, the creation of technological reservoir for Draghi and treatment facilities for wastewater [Leshkov V.G. Development of placer deposits. - M.: Izd-vo Mining book, 2007. - S-606, RIS, g].

Common features of the prototype with the claimed technical solution are carrying out river bed diversion channel, creating a process pond for Draghi and treatment facilities for wastewater.

The disadvantages of the prototype is the construction of russiatoday outside contour of stocks, a significant difference in water levels in RusRoute and technological reservoir and the sump, the need to return to the riverbed after the head of the deprivation of development of the reserves in telugulo part of the floodplain.

The claimed technical solution aimed at improving environmental cleanliness dredging works.

The technical result is to increase the environmental safety of the water supply dredging works by reducing the area of disturbed land and reduce the volume of hydraulic engineering works for water removal and restoration of the riverbed.

The technical result is achieved in that in the method of water dredging works described in claim 1 of the claims, including river bed diversion channel, creating a process pond for Draghi and treatment facilities for wastewater, according to the invention the river bed diversion channel is formed in the form of restored channel dredging in the sinus formed by the reserves longitudinal stroke, followed by a heaping of the prisms on the inner slope of dredging spoil.

During the development of the placer dredges educated in the process of dumping sinus between the piles and the wall of the open pit have a sufficiently large cross-section, allowing the pass of the river with a small flow rate, which eliminates erosion processes.

To prevent water exchange between the river and technological reservoirs, as well as reducing water erosion dredging dumps on the inner slope dumps slept excavation prism.

the increase culvert capacity dredging sinus (living section), what is important on large streams, the parameters of the sinus should be increased.

The technical result is achieved in that in the method of water dredging works described in paragraphs 1 and 2 of the claims, including the formation of river bed diversion channel in the form of restored channel dredging in the sinus formed by the reserves longitudinal stroke, followed by a heaping of the prisms on the inner slope dredging spoil, according to the invention the recess of minerals in the longitudinal course of conduct asymmetric maneuvering Draghi.

It is known that the method of extraction of minerals unbalanced maneuvering Draghi is used to reduce dilution and loss of sand in mihalovich the pillars, as well as to create favorable conditions for the construction of wodoodporne structures [Leshkov V.G. Development of placer deposits. - M.: Izd-vo Mining book, 2007. - S-656, RIS, in].

In the claimed technical solution of the asymmetric maneuvering solves another task and is used for expansion of dredging sinus.

With a significant drop in water levels in the river and in the technological and wastewater treatment ponds increase filtration flows in the direction of decline. When the filtration leaks from process water in the river may be exceeded the permissible level is ugrasena surface waters. So you want the maximum reduction in water exchange between the river and technological waters.

The technical result is achieved in that in the method of water dredging works described in paragraphs 1 and 3 of the claims, including the formation of river bed diversion channel in the form of restored channel dredging in the sinus formed by the reserves longitudinal stroke, followed by a heaping of the prisms on the inner slope dredging spoil, according to the invention the level of water in process water and wastewater treatment plants supported on the horizon of the water in RusRoute.

The water level is regulated by dams (wodoodporne dams, bridges.

Differences from prototype to prove the "newness" of the proposed method.

The unknown impact of signs, similar to the distinctive essential features of the proposed method, on the technical result consists in increasing the environmental security dredging works and the decrease in hydraulic works and achieved the claimed technical solution proves its compliance with the conditions of patentability "inventive step".

The invention is illustrated by drawings, where figure 1 shows a plan moves Draghi when testing two adjacent parcels polygon:

1 - outline of the first section of the polygon;

2 - the path of the WTO is on the disposal area;

3 - direction moves Draghi;

4 - dredging sinus;

5 - natural riverbed;

6 - rylott dredging in the bosom on the first segment;

7 - rylott (restored channel) dredging in the bosom on the second site;

8 - dam.

Figure 2 shows the cut generation across the longitudinal course Draghi unbalanced maneuvering:

Position 4 is the same as in figure 1.

9 - Eveline dumps;

10 pebble dumps;

11 - earth prism.

The way water dredging works is as follows.

Development of the first section begins longitudinal course Draghi along one of the paths 1. After completion of longitudinal travel within area 1 continues practicing the rest of the stocks in the contours of this area. As podvigina Draghi longitudinal motion on the inner slope evalnih 9 and 10 pebble dumps slept excavation prism 11, the overlapping dredging spoil and reducing their water erosion and seepage leakage of the generated russiatoday 6. After dumping ground prism 11 natural river channel 5 is put into 6, which is formed in the form of restored channel, i.e. calculated to permit maximum flood discharges 1% probability.

During the development of the diamond fields in the uprising last move Draghi along the opposite path first is the second portion of mash is longitudinal with the formation of dredging sinus in the form of the restored channel. This longitudinal stroke continues until the end of the second above section 2, followed by a heaping of the prism 11 on the inner slope dredging evalnih 9 and 10 pebble dumps. Then the river starts in the newly created rylott 7.

After completing the studies of the second longitudinal section of the course begins dredging the next section in the same order. The last section of the river starts in one ruslotto formed along the contour of the stock. Rylott the opposite path of the inventory can be used to collect surface water from lateral inflows and subsequent discharge to the river downstream of all mining area.

Dredging sinus along one of the paths stocks, which is formed in the form of restored channel and is calculated on a maximum 1% probability flow in the river to increase its throughput and living section of the water flow is formed asymmetrical maneuvering Draghi.

After development of the reserves of the longitudinal course of the dredge with the creation of dredging sinus with the necessary cross-sectional area are heaping of the prisms on the inner slope of dredging spoil. To do this, on the ridge of the dredging spoil bulldozer create a road for vehicles or forklifts. After that, dump trucks or pogruzodostavochnye overburden, who slept during the along the roads and created on the blade side of the formed russiatoday. At the final stage of the delivered overburden with dozer is created on the inner slope dredging spoil soil prism.

The cross-sectional area excavation prism will be 20-30 m2that is less than the sectional area of river bed diversion channels formed on the ridges of the valley with a maximum expenditure of the river more than 10-20 m3/s In the valleys wide enough placers maximum river flow are several tens to hundreds of cubic meters per second. Therefore, the proposed solution will significantly reduce the amount of hydraulic works water dredging works even without taking into account the work required for restoration of the riverbed in the process of reclaiming the traditional way of water.

To control the exchange of water between surface runoff (river) and technological reservoirs and treatment plants, the water level in RusRoute, technological and wastewater treatment ponds should be equal, that is regulated by dams on the edges, and transverse ridges.

1. The way water dredging works, including river bed diversion channel, creating a process pond for Draghi and systems of treatment sooruzheniya wastewater characterized in that the river bed diversion channel is formed in the form of restored channel dredging in the sinus formed by the reserves longitudinal stroke, followed by a heaping of the prisms on the inner slope of dredging spoil.

2. The method according to claim 1, characterized in that the recess of minerals during the formation of river bed diversion channel perform single-ended maneuvering Draghi ensuring maximum cross-sectional area dredging sinus.

3. The method according to claim 1, characterized in that the level of water in process water and wastewater treatment plants water supply dredging works to maintain the level of water in the river bed diversion channel.



 

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