Method of development of connate water flooded placers

FIELD: mining.

SUBSTANCE: invention refers to development of connate gravel deposits of solid minerals, particularly beach deposits of shelf. The method of development of connate water-flooded placers consists in preliminary concentration of useful component of sands in a lower part of the placer by means of excitation of elastic vibration and in successive stopped excavation. A tubular casing is introduced into the placer; the height of the casing exceeds the distance from the surface to the raft of the placer, excitation of elastic vibration in placer sands is performed by means of their transmission from surface via the tubular casing. Further a compressive force onto contacting surface, covering volume of empty material, is exerted from the side of interior surface of the casing. Then lower part of placer is hydraulically excavated by means of supply of washing water through nozzles arranged at walls of the tubular casing; pulp is withdrawn through soil draw-off apertures made at walls of the tubular casing between nozzles. Also after completion of excavation of lower part of the placer, pressure onto the surface, covering volume of empty material contacting with interior surface of the casing, is dropped to zero. When the cavity of the casing has been filled to a level corresponding to a ground level, the casing is pulled off.

EFFECT: increased selective extraction.

3 dwg

 

The invention can be used in the design of buried placer deposits of solid minerals, preferably beach deposits of the shelf.

Known methods of hydraulic mining (see Shorokhov S.M. in Technology and comprehensive mechanization of the development of placer deposits. - M.: Nedra, 1973, 766, p.260-307), including erosion of sand jet, gravity transported to the sump and hydroelevators rise to wash the device.

The disadvantages of the known methods is the limited use due to the large consumption of water resources and significant ecological impact on the environment.

More close analog of the method according to technical essence is a way of developing the buried flooded fields, including pre-concentration of the useful component of sand in the lower part of the placers by excitation in the Sands of scattering of elastic waves and the subsequent treatment of the notch (see patent 2106495, CL IS 41/00, 1998).

The disadvantage of this method is the low efficiency of mining due to testing of the prepared land in traditional ways, while not minimizing the recess covering the waste rock, because it is not guaranteed that the verticality of the walls of the sewage extraction, formed in the process of develo the TCI (because of nervoznost material).

The basis of the invention is the task of increasing the selectivity of the extraction.

Technical result achieved when solving a task, expressed as the exception excavation volumes covering the waste rock, the exception dilution Sands, the decrease in recoverable Sands and the decrease in the volume of tailings to be disposed.

To solve the problem how to develop buried flooded fields, including pre-concentration of the useful component of sand in the lower part of the placers by excitation in the Sands of scattering of elastic waves and the subsequent clean the recess, characterized in that the scattering of implementing the tubular shell, the height of which exceeds the distance from the surface to the raft scattering, excitation in the Sands of scattering of elastic waves carry their transfer from the surface through the tubular shell, and then from the inner surface of the membrane forming the compressive force on the contacting surface covering of the empty volume of the material, followed by hydraulic dredging the bottom of the mash feed water scour through nozzles placed at the walls of the tubular shell and the removal of the pulp through grutsamaria holes placed at the walls of the tubular shell between the nozzles, and in the end you are the MKI bottom of the mash is reduced to zero pressure contact with the inner surface of the shell surface covering of the empty volume of the material and after filling the cavity of the shell to the level of the earth's surface, the shell is removed.

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: "...in the scattering of implementing the tubular shell, the height of which exceeds the distance from the surface to float, placer..." exclude mixing of sand and covering the load when removing the cladding, and also provides isolation of the working volume from the rest of the array. In addition, when using at least two such devices, provided the deposition of tailings in mined-out space of one of them, which eliminates the discharge of tailings into the environment. In addition, it is possible to implement further methods and operations of the method.

Signs: "...the excitement in the Sands of scattering of elastic waves carry their transfer from the surface through the tubular shell..." simplify the transmission of elastic waves in the volume of sand.

Signs: "...from the inner surface of the membrane forming the compressive force on the contacting surface, the coating amount of blank material..." provide compression Vert is an intersection of the walls of the array of material, cut off the casing, and thereby eliminates the possibility of the destruction of the "tube" of cover rocks during extraction layer of sand.

Signs: "carry out hydraulic dredging the bottom of the slope, with submission to lose water through nozzles placed at the walls of the tubular shell, and the removal of the pulp through grutsamaria holes placed at the walls of the tubular shell between nozzles provide localization technological impact in the lower layer of sand layer, to be hollow, thus providing a uniform and qualitative erosion of material isolated case and the quality of his destruction.

Signs: "...upon completion of excavation bottom of the mash is reduced to zero pressure contact with the inner surface of the shell surface, the coating amount of blank material and, after filling the cavity of the shell to the level of the earth's surface, the shell is removed." - provide reuse of the tubular shell.

The essence of the invention is illustrated by drawings.

Figure 1 presents the scheme of arrangement providing for the implementation of the claimed method in the implementation phase of the tubular sheath, figure 2 shows the same, at the stage of excavation of sand, figure 3 shows a cross-section of the tubular shell.

In the drawings shown Grun sabornie device, ensuring implementation of the inventive method, comprising a housing 1, made in the form of a tubular shell, the height of which exceeds the distance from the surface 2 to the float buried placers 3. The cross-sectional shape of the housing 1 can be arbitrary, but for the qualitative gap bridging between the walls of buildings and, thereby, increase the weight a notch better rectangular cross-section. The weight of the housing must meet the capabilities of handling equipment (not shown)available. While the transverse dimensions of the housing 1 does not exceed twice the range of scour nozzles 4, placed at equal distances from each other around an interior cavity of the housing 1. When this suction nozzles 5 are placed at equal distances from each other around an interior cavity of the housing 1, between scour nozzles 4. Scour nozzles 4 are oriented horizontally, with the appropriate addition of their output holes forms a horizontal slit. Besides, the vibrator 6 (it is advisable to use a removable vibrators fixed on the housing 1 in the necessary quantities for the period of its introduction into the soil and vibrating processing of the array). The weight and size parameters and performance characteristics of the vibrator is determined in a known manner, taking into account the ω mass and size of the housing 1 and the desired vibration intensity array processing (usually with increasing size of the corps named parameters increase). The inner wall 7 of the housing 1 provided with a means of formation of force perpendicular to the inner surface of the housing 1, made in the form of toroidal hollow shell 8, is bonded with the inner surface of the housing 7 and is equipped with a reversible hydraulic pump 9. In the case of giving a cross-section housing square shape of scour nozzles 4 are placed on the sides of the square, and the suction nozzles 5 placed at its corners. To ensure the safety of toroidal hollow shell 8 in the implementation of the housing 1 into the ground, it is advisable that the edge 10 of the body was provided with a hollow annular Shoe 11 (cross-section which is triangular in shape, and the latter is placed in the inner cavity of the body). In the cavity of the Shoe 11 have to lose nozzle 4 and the suction nozzle 5 so that they do not go beyond the walls of the Shoe facing the edge 10 of the body 1.

It is advisable that the toroidal cavity of the hollow shell 8 has been linked with reversible hydraulic pump 9 through a check valve (not shown), providing the ability to turn off the pump after the introduction to the work of the toroidal hollow shell 8 and use it on another gruntsgabalam device.

It is advisable to scour nozzles 4 have been associated with the pressure means 12 is placed on the poverhnosti separate vodopodayuschih channels 13, performed as the longitudinal structural elements of the housing 1. In addition, it is advisable that the suction nozzles 5 have been associated with receiver tanks 14 (e.g., containers)placed on the surface of the individual outlet channels 15, designed as a longitudinal structural elements of the housing 1, while the total area of these channels should be equal, although the diameter of the channels 15 must be greater than the diameter of the channels 13 to avoid testimonianza. The drawings also shows the float 16 and the array Sands 17.

The inventive method is implemented as follows

To the place of work deliver the above groundsamine device, place it on the area designated for excavation. Next carry out the implementation of the suction head; it is in the array, applying to the upper end of the body 1 a pressing force (with the possible inclusion of the vibrators 6, and/or scour nozzles 4, to speed up the process of immersion). When the Shoe 11 of the housing 1 at the level of the float 16, hold the vibration treatment of the array is surrounded by a housing 1, while previously this array should be watered for beach placers is "automatically" due to water filtration). Next include the vibrator 6 (or vibrators 6), temporarily fixed on the upper part of the housing 1, and begin webroar the processing of the array by passing the vibrations and wave propagation on hydric array. With the passage of the waves through the array of particles composing this array come in an oscillatory motion. Particles of ore minerals in the sand layer have a higher density than the enclosing rock particles. Therefore, when the oscillating movements as the propagation of waves on hydric solid particles of ore minerals fall in the lower part of the layer of sand and aggregate off of the float 16. At the end of the vibrating processing process, in the work include the following hollow shell 8 (pumped water into it through a reversible hydraulic pump 9, and to form the compressive effort (about 5 kg/cm2) addressed to them on the surface of the array covering the waste rock in the volume, which is in the cavity of the housing 1. The working water is pumped under pressure through the channels 13, where through the scour injector 4 expires in removing the array Sands 17, blurring it and saturating with water. The resulting impact on the Sands of the water jets emanating from the scour nozzles 4, the slurry is sucked through the suction pipe 5 and through the outlet channels 15 is given to the place of storage to the surface and placed in the receiving tank 14. As excavation of sand overlying volumes obrushayutsya on the raft 16, where Sands are removed as described. While covering the breed, who reaped toroidal hollow shell 8 are fairly stable tube, moreover, direct exposure to scour jet does not have a layer of sand eroded them is like a protective cushion for them). On the surface, in a known manner, control the content of useful component in the issued pulp. After removal of the enriched layer of sand content of useful component in the pulp begins to fall sharply. When you commit this treatment notch stop (stop water flow and drainage of the pulp). Further relieve pressure in the cavity following the hollow shell 8 (preferably by pumping from water - pump on the reverse). In the result, previously held by the shell 8 array covering the rocks down on the raft. Further, the body 1 is raised to the surface (lifting mechanisms - not shown), and then used again in the previously described manner. The recess remaining after extraction of the housing 1, is filled with tailings Sands, previously extracted.

The use of the proposed solution leads to the exclusion of dredging volumes covering the waste rock, the exception dilution Sands, reduction of volumes extracted sand and reduce the volume of tailings to be disposed.

The way to develop buried flooded fields, including pre-concentration of the useful component of sand in the lower part of the ro is rash by excitation in the Sands of scattering of elastic waves and subsequent treatment notch, characterized in that the scattering of implementing the tubular shell, the height of which exceeds the distance from the surface to the raft scattering, excitation in the Sands of scattering of elastic waves carry their transfer from the surface through the tubular shell, and then from the inner surface of the membrane forming the compressive force on the contacting surface covering of the empty volume of the material, followed by hydraulic dredging the bottom of the mash feed to lose water through nozzles placed at the walls of the tubular shell, and the removal of the pulp through grutsamaria holes placed at the walls of the tubular shell between the nozzles, while upon completion of the excavation bottom placers reduce to zero pressure contact with the inner surface of the shell surface covering of the empty volume of the material and after filling the cavity of the shell to the level of the earth's surface, the shell is removed.



 

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5 dwg

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2 dwg

FIELD: mining engineering.

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6 dwg 2 cl

FIELD: mining.

SUBSTANCE: invention refers to loose ground mining devices, and can be used for deep alluvial deposits of hard mineral resources, and mainly coastal shelf deposits. Alluvial mining device includes a body with a suction connection pipe and with scouring atomisers connected with a discharge cavity. Body is made in the form of a tubular shell the height of which exceeds the distance from surface to rim rock, and lateral dimensions of the body do not exceed a double action radius of scouring atomisers. Body cross section is square-shaped, at that scouring atomisers are arranged on the sides of the square, and suction connection pipes are located at its angles. Body is equipped at least with one vibrator. Internal wall of the body is equipped with a device forming a force impact which is perpendicular to internal surface of the body; device is made in the form of a hollow torus-shaped shell attached to internal surface of the body and equipped with the device changing pressure in the shell cavity, mostly with a reversible hydraulic pump.

EFFECT: providing the possibility of removing loose materials, and maintaining a vertical position of the resulting cavity walls.

3 cl, 3 dwg

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