Method for underwater placer deposit development

FIELD: mining, particularly to develop deposits in shelf adjoining shore line.

SUBSTANCE: method involves forming enveloping structure made as closed barrier, which surrounds placer deposit area, extending from bedrock to water surface; separating space inside enveloping structure in at least two chambers; introducing excavation equipment for placer material mining inside chambers after enveloping structure forming; mining placer material in the first chamber; excavating placer material in the next chambers with tails stacking in previous chamber up to level of not less than water area bottom; removing enveloping structure chambers from the goaf side of mining area adjoining chambers from which placer material is excavated and forming thereof in immediate proximity to chambers from mining propagation side.

EFFECT: increased mining completeness, provision of inner enveloping structure cavity dimension independence of placer deposit thickness in capping rock presence.

5 cl, 4 dwg

 

The invention relates to the field of mining and can be used in the development of offshore oilfields, preferably adjacent to the coast line in those areas, aquatic areas, where increased requirements for environmental protection, preferably at shallow depths.

There is a method of developing a submarine deposits, including the installation of anchors, mounting the optical path of the scraper system with a processing unit, the implementation of the processing unit in the thickness of the alluvial deposits and the forced moving processing unit by means of the scraper unit to the coast line with the selection of placer material useful components and subsequent unloading it mounted on the shores of the hopper (see Dobretsov IN the Development of mineral resources of the shelf. - Leningrad: Nedra, 1980, s.219-221, RES.).

The disadvantage of this technical solution - low environmentally friendly way (destruction of habitat and degradation of habitat conditions aquatic organisms and plants due to violations of the conditions of their habitat), a significant dependence of the method development on weather conditions and the need for the high cost of energy, which excludes the possibility of implementation of the method in the untapped areas without deployment of appropriate energy sources.

There is also known a method of developing a submarine deposits, including the introduction of a scattering Ogre is giving design within working area, the excavation of material in the volume limited cladding, Department of tailings from the useful component and the deposition of tailings in mined-out space in the volume limited cladding (see Dobretsov IN the Development of mineral resources of the shelf. - Leningrad: Nedra, 1980, p.222-224, RES.). This fencing is made in the form of a hollow body, open at the bottom and containing in its cavity processing unit and means to move the material through placer processing unit, configured to accumulate it useful component.

The disadvantage of this technical solution is "binding" of the building envelope power placers, which dramatically lowers the work efficiency in the presence of cap rocks, and with the growth of their power, the method can be generally ineffective, as adopted enrichment technology provides for the accumulation of useful component and discharge of tailings back into the cavity walling. This circumstance, in turn, increases the bulk and weight of the device, which forces to equip the craft powerful lifting mechanisms for dive-extraction of the casing. In addition, when using the device in the process of mining of placers, the content of useful components in which quite large (almost the and, all materials, except precious metals and materials), with the inevitable dilution of the material placer and its loss due to mixing of the material with barren rocks in the process of processing material placer, recovery housing, implementation of the housing.

The task, which directed the claimed solution, which seeks to ensure completeness of extraction and independence of the dimensions of the internal cavity walling from power placers in the presence of cap rocks.

Technical result achieved when solving a task, expressed in the exclusion of additional artificial impacts on waters containing scattering, when it is working, and it eliminates the increased turbidity of the water area in excess of natural levels resulting from coastal disturbances, reduces the loss of alluvial material (sand) due to its mixing with barren rocks in the process of processing material placer, recovery housing, implementation of the housing. In addition, allows the complete removal of the sand.

To solve the problem how to develop underwater deposits, including the introduction of a scattering of the building envelope within the working area, the excavation of material in the volume limited cladding, Department of tailings from the field, the aqueous component and the deposition of tailings in mined-out space in the volume, limited cladding, characterized in that the envelope shape in the form of fences, forming a closed perimeter, which protect the area placers from the float to the water surface, while the space inside the enclosing structure is shared by at least two compartments, with the mining equipment for the extraction of alluvial material injected into the space compartments after the formation of the cladding, and after excavation of alluvial material in the compartment, the exhaust first, the excavation of material in each of the following compartments are with the deposition of tailings in mined-out space of the previous compartment to a level not less than the level of the bottom of the waters, and after that compartments the building envelope is extracted from goaf working area adjacent to the compartments in the space by the excavation of material placer and form close to the Bay side, which impels the mining activities. The excavation of the material placer start below the bottom mark layer covering soils, preferably starting from the raft. In addition, the recess of the material placer start from the bottom waters. In addition, the compartments enclosing structure formed from tubular casings of rectangular cross-section. The height of the fence, over which Mr. waters take from the condition of exceeding the maximum level of the water surface.

Comparison of the characteristics of the claimed solution with signs analogues and prototype demonstrates its compliance with the criterion of "novelty".

The characteristics of the characterizing portion of the claims, solves the following functional tasks:

Signs "...walling form to the fence, forming a closed perimeter, which protect the area placers from float to the surface of the water..." exclude mixing of sand and covering the load when removing the cladding, in addition, provides isolation of the basin from the water space above the working area.

Signs "...the space inside the enclosing structure is shared by at least two compartment...together with signs "...after excavation of alluvial material in the compartment, the exhaust first, the excavation of material in each of the following compartments are with the deposition of tailings in mined-out space of the previous compartment..." eliminate the discharge of tailings into the bottom space (as in the prototype), and thus the dilution Sands tailings - waste cycle enrichment of the last volume of the material, i.e. excluding impact of tailings in the preceding volume of materials placers on the quality of the sand taken for enrichment. This reduces cycle time about what gamania and the amount of material recoverable in the amount of enclosed space. In addition, there is podvigina treatment works on the territory of the excavation area.

Signs "...mining equipment for the extraction of alluvial material injected into the space compartments after forming the cladding..." provide easy adaptation and variability of excavation equipment depending on geological conditions, including the presence or absence of load, power sand and/or sediment, etc. in Addition, it simplifies the design of the fence, the organization works.

The characteristics that define compartments that the building envelope is extracted after filling of the compartments tails "...up to a level not less than the level of the bottom of the waters...", exclude mixing of sand and covering the load when removing the enclosing structure.

Signs "...compartments... extract from goaf working area adjacent to the compartments in the space by the excavation of material placer and form close to the Bay side, which impels the mining activities..." provide complete development area excavation of the site.

Signs of the second claim of the invention allows to minimize the quantity of the material at high power load.

Signs of trateg the claim of the invention allows to minimize the amount of extractable material in the absence of load.

The sign of the fourth paragraph formula allows to increase the rigidity of the fence with a large capacity sand and/or silt.

The signs of the fifth paragraph of formulas allow to eliminate pollution of the waters.

Figure 1 shows the layout of the processing blocks in the working position; figure 2 - a section a-a figure 1; figure 3 shows a longitudinal section of a processing unit in the tubular casing of the phase accommodate tails; figure 4 shows the same in the process of material cut placers.

In the drawings shows a scattering of 1, sediment 2, walling 3 border 4 working area, excavation equipment 5, craft 6, 7 tails, goaf 8 in volume, limited cladding 3, the float 9, the mirror 10, the compartments 11, the bottom of the water area 12, goaf 13 working area, the direction of podvigina excavation works.

Compartments enclosing structure 3 is made in the form of a tubular body made of metal. The cross-sectional shape of the housing can be arbitrary, but for the qualitative gap bridging between the walls of buildings appropriate rectangular cross-section. Its dimensions and weight are determined by the capabilities of handling equipment available.

As excavation equipment 5 using known is trojstva - or grapples, or suction dredger fitted with mechanical or hydraulic rippers, if necessary, mounted on boats 6.

As boats 6 use self-propelled or non-self-propelled floating base, performed in a known manner, the precipitate which provides the ability to work in shallow water, the displacement of which provides accommodation for hoisting vibrophone devices (not shown), excavation equipment 5. In addition, if provided for processing alluvial material directly on Board the vessel, then it mounted and processing equipment and storage bins for accumulating useful component, removal tools tails, for example in the form of pipelines (not shown), if the processing of placer material is provided on the shore, the boat 6 in a known manner is connected with the shore, for example, by slurry pipelines for transport of sand and reverse transport of tailings and associated hydraulic Elevator (not shown).

The claimed method is performed in the following order.

The compartments 11 and the cladding 3 plaskota (not shown) or on the deck of the watercraft 6 delivered to the installation site. Then by lifting mechanisms boats 6 (not shown) of the first compartment 11 is lowered to the bottom of the Aqua the Oria, preferably one side of 4 working area, then using vibrophone devices known way make it to lowering of the float 9 placer 1. Then next to the first compartment 11 and the cladding 3 is similar to post later. Preferably, the compartments 11 in the cladding 3 were placed in at least two rows. The gaps between the sections overlap, hammering them in wooden beams (not shown). Then in the volume limited by the first compartment 11 cladding 3, enter the excavation equipment 5 through which begin the excavation of the material. After enrichment extracted placer material useful component warehoused and tails 7 temporarily warehoused in the next compartment 11 on the surface of the solid material contained in it. After filling this compartment tails 7 warehoused in the next compartment. After extraction of alluvial material in the first compartment of the work in the next compartment start with reverse transshipment temporarily stored therein tails 7, after the removal of which the work is carried out with removing the material in the working compartment and the deposition of tailings in mined-out space previously "worked" compartment or compartments. And so on until "testing" all of the compartments 11.

If the notch material placer start from the bottom of the water area 12(using suction units), the first known way to implement becoming a dredger in the field, preferably to the float 9, and then start removing material placers. While tails 7 occiput on the surface of the material located in the same compartment.

The filling level in the compartments stored in their tails 7 provide not less than the level of the bottom of the water area 12 (preferably with a slight excess of 0.3-0.5 m), to compensate for the volume occupied by the design of the compartment, while removing from the array. Further, the compartments 11 and the cladding 3 is extracted from goaf 13 working area adjacent to the compartments 11, in the space which carry out the excavation of the material placer and form close to the Bay side, which impels the excavation work, and repeat the procedure until full development of the area of excavation of the site.

1. The way to develop underwater deposits, including the introduction of a scattering of the building envelope within the working area, the excavation of material in the volume limited cladding, Department of tailings from the useful component and the deposition of tailings in mined-out space in the volume limited cladding, characterized in that the envelope shape in the form of fences, forming a closed perimeter that Ogre who support the site placers from the float to the water surface, thus the space inside the enclosing structure is shared by at least two compartments, with the mining equipment for the extraction of alluvial material injected into the space compartments after the formation of the cladding, and after excavation of alluvial material in the compartment, the exhaust first, the excavation of material in each of the following compartments are with the deposition of tailings in mined-out space of the previous compartment to a level not less than the level of the bottom of the waters, after which the compartments of the building envelope is extracted from goaf working area adjacent to the compartments in the space by the excavation of material placer and form against the side compartments that move excavation work.

2. The way to develop underwater placer according to claim 1, characterized in that the recess of the material placer start below the bottom mark layer covering soils, preferably starting from the raft.

3. The way to develop underwater placer according to claim 1, characterized in that the recess of the material placer start from the bottom waters.

4. The way to develop underwater placer according to claim 1, characterized in that the compartments enclosing structure formed from tubular casings of rectangular cross-section.

5. The way to develop underwater placer according to claim 1, featuring the the action scene, what is the height of the fence above the bottom of the waters of the take from the condition of exceeding the maximum level of the water surface.



 

Same patents:

FIELD: mechanical engineering, particularly underwater mineral deposit mining.

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13 dwg

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4 cl, 4 dwg

FIELD: technologies for extracting concretions from sea bottom.

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2 dwg

FIELD: mining industry, particularly for obtaining minerals from underwater.

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3 cl, 16 dwg

FIELD: obtaining minerals from underwater, particularly hydro-mechanized devices for concretion production from seabed.

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EFFECT: increased productivity.

5 dwg

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EFFECT: possibility of mining work performing at variable development depth.

4 dwg

FIELD: mining, particularly to produce ore and rock materials, for instance building materials.

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EFFECT: possibility of mining work performing at variable development depth.

2 dwg

FIELD: methods to develop underwater and flooded ferromanganesian concretion and phosphate shelf concretion deposits, as well as similar flooded and marine deposits mainly including horizontal and flat thin seams located on bed surface.

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EFFECT: simplified structure and reduced losses in sludge lines.

7 dwg

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