Method of development of buried water-flooded placers

FIELD: mining.

SUBSTANCE: method of development of buried water-flooded placers includes preliminary concentration of useful component of sands in lower portion of placer by means of excitation of elastic oscillations in placer sands and successive stoped excavation. A tubular shell is inserted into the placer; the height of the shell exceeds the distance from the surface to the float of the spacer. Excitation of elastic oscillations in spacer sands is performed by means of their transmitting from the surface via the tubular shell. After compressive force has been formed from interior surface of the shell onto contacting surface of covering volume of barren material and after completion of vibratory processing the hydraulic stoped excavation of lower part of the placer is carried out; washing water is supplied via sprayers assembled at walls of the tubular shell and pulp is withdrawn via soil intake openings located at walls of the tubular shell between the sprayers. Also after completion of stoped excavation of lower part of the placer the stoped space is backfilled by supplied backfilling pulp and water withdrawal. Further backfilling pulp is formed from mixture of water with barren rock, for instance, with tailings of sand concentration. After backfilling of excavated space pressure onto surface of covering volume of waste material contacting with interior surface of the shell is dropped to zero and the shell is extracted.

EFFECT: increased selectivity of excavation.

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, including sand erosion jet, gravity transported to the sump and hydroelevators rise jetting device (Smokov. Technology and complex mechanization of placer developments, M.: Nedra, 1973, 766 S., p.260-307).

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 subsequent treatment notch (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 development and is for 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, after the inner surface of the shell is formed by the compressive force on the contacting surface covering of the empty volume of the material upon completion of the vibrating processing carried 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 the force is with Russia, upon completion of the excavation bottom placers are mined-out space feed him backfill slurry and water drainage and backfill slurry formed from a mixture of water with waste rock, for example, tailings sand, then after laying-out space is reduced to zero pressure contact with the inner surface of the shell surface covering of the empty volume of the material and remove the shell.

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, in addition, provides isolation of the working volume from the rest of the array. In addition, when using at least two of such devices is provided by 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: "...opened the giving 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.

The temporal reference of the vibrating processing - signs: "...after the inner surface of the shell is formed by the compressive force on the contacting surface, the coating amount of blank material..." - eliminate excessive destruction of volume cap rocks in the process of vibrating processing of sand, as against her shell "works" and as a shock absorber and as a means of providing compression of the vertical walls of the array of material cut out of the hull, and thereby eliminate the destruction of the "tube" of cover rocks during extraction layer of sand.

Signs: "...implement 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 the nozzles..." - provide a localized technological impact in the lower layer of sand layer, to be hollow, thus providing a uniform and high-quality erosion material, isolated case, and the quality of his destruction.

Signs: "...implement the mined-out space feed him backfill slurry and water drainage and backfill slurry formed from a mixture of water with waste rock is th, for example, tailings sand, then after laying-out space is reduced to zero pressure contact with the inner surface of the shell surface covering of the empty volume of the material and extract the shell...provide for the reuse of the tubular shell and preclude violation of the surface.

The essence of the proposed solution 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 groundsamine 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 radius of blur is their nozzles 4, placed at equal distances from each other around an interior cavity of the housing, while the suction nozzles 5 are placed at equal distances from each other around an interior cavity of the housing, between scour nozzles 4. Scour nozzles 4 are oriented horizontally. Thus advisable to bargain 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 with regard to weight 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 made in the form of toroidal hollow shell 8, is bonded to the inner surface of the wall 7 of the housing 1 and provided 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 provide with the rennosti toroidal hollow shell 8 in the implementation of the housing 1 into the ground, it is advisable that the edge 10 of the body 1 was provided with a hollow annular Shoe 11 (cross-section which is triangular in shape and which 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 surface of the individual vodopodayuschih channels 13, designed as a longitudinal structural elements of the housing 1. In addition, it is advisable that the suction nozzles 5 were associated with receiving tank 14, for example, the 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. In the drawings, the raft is 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 into the work include toroidal hollow shell 8. Pumped water into it through a reversible hydraulic pump 9 to the formation of compressive forces (on the order of 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. Then 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 start the vibration treatment of an 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 is bladud higher density compared with 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 process vibrating processing, begin the clean-out recess enriched layer of sand. While 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 rocks, compressed toroidal hollow shell 8 are fairly stable tube, moreover, that the direct impacts of 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 is the clean-out recess stop (stop water flow and drainage of the pulp). This is followed by a tab formed goaf feed him backfill slurry and water drainage and backfill slurry formed from a mixture of water with waste rock, preferably, the tailings extracted before the amount of enriched Sands. In the process of bookmarks for filing use of scour injector 4 (reducing the pressure), and to divert water use suction nozzles 5. After the process is complete, the pressure in the cavity toroidal hollow shell 8 discharge (preferably by pumping from water - pump on the reverse), then case 1 is raised on the surface of the lifting mechanisms (not shown). Then use it again in the previously described manner.

The use of the proposed solution leads to the exclusion of dredging volumes covering the waste rock, the exception dilution Sands, to reduce the 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 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 the STI to the float, placer, the excitement in the Sands of scattering of elastic waves carry their transfer from the surface through the tubular shell after the inner surface of the shell is formed by the compressive force on the contacting surface covering of the empty volume of the material upon completion of the vibrating processing carried out hydraulic dredging the bottom of the mash feed to lose water through nozzles placed at the walls of the tubular shell and the discharge 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 are mined-out space feed him backfill slurry and water drainage and backfill slurry formed of a mixture of water with waste rock, such as tailings Sands, then after laying-out space is reduced to zero pressure contact with the inner surface of the shell surface covering of the empty volume of the material and remove the shell.



 

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FIELD: mining.

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FIELD: mining.

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FIELD: mining industry.

SUBSTANCE: present invention relates to the field mining using thermal fragmentation for the extraction of ore from narrow veins. The method of ore extraction from a vein with opposite side walls involves drilling of pilot holes in the vein directly, with certain pitch along the vein, reaming of the pilot holes by thermal fragmentation until the vein is fragmented, and removal of fragmented ore along the vein. The pitch is determined by the vein width. Along a part of the vein, the pilot holes are reamed gradually according to the given configuration, each second pilot hole is reamed in a greater degree, for its connection to the opposite adjacent pilot holes reamed earlier. The pilot holes are drilled and reamed in a given sequence, starting from drilling of the first group of three pilot holes, the first and third holes from the first group are reamed before reaming the second hole from this group. After the first group of holes, a group of two holes is drilled, the second hole from the second group being reamed before reaming the first hole from the second group. Fragmented ore is removed by suction.

EFFECT: profitable mining of narrow ore veins.

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FIELD: mining.

SUBSTANCE: method includes the subterranean development of field with use of the chamber systems with the solid stowing and following refinement of the ore mass at the ore mill in the following stages. At the beginning, the ore recovering from the first-stage chamber (4) is performed. The ore pickings from the first-stage chamber (4) are processed to concentrate and final tailings. The tailings are processed to pellets. From the pellets, two workflows are formed, the first pellet flow is exposed to the heap leaching, and the second pellet flow is conditioned until the required mechanical characteristics. On completion of the leaching process, the pellets of the first workflow are mixed with binding agent and water, to receive the fill mixture, the fill mixture is sent to the first-stage chambers (4) until filling; after the fill mixture is solidified, the ore recovering from the second-stage chamber (5) is performed, the chamber's bottom is strengthened and prepared with the solidifying mixture which is prepared using the waste from the heap leaching; pellets of the second workflow are sent to the chamber with their following subterranean leaching.

EFFECT: comprehensive and complex development of minerals and ecologic-economic effects are provided.

4 cl, 1 dwg

FIELD: mining engineering.

SUBSTANCE: working method includes drifting of preparatory breakoffs, slicing of stope inclined strips, inclined according to sloping angle of ore body, beginning with hanging layer directed to bottom wall, ore breaking with explosive holes. Breakage, transportation and formation releasing from rocky bands in ore body are carried out separately through the flanking debris chute. Previous slice after corresponding preparation is filled with weak solid stowing, which provides hardiness of its walls, at that interblock pillars are eliminated with leaving of free technological space between ore mining face roof and horizontal surface of previous slice filling mass. At first one excavates low layer of the block with entry ways at whole its length, fills worked entry ways with hard solidifying mixture in particular order with preliminary armature setting up, so that after the complete excavation of the layer in-situ concrete slab is appeared. It performs the functions of ceiling while debugging of underlying block reservoir.

EFFECT: effectiveness improvement of ore excavation and safety of stopes working.

4 dwg

FIELD: mining industry.

SUBSTANCE: said method implies development and temporary drifting, horizon reserves hole drilling down to pillar bottom, hole 13 charging and blasting, loading of dumped ore from the block through loading workings 5. After loading workings drifting, stables 2 are worked out in the block corners, cutting across thickness of the ore body, fanned ring is drilled in the ore body hanger in parallel to the ore body bed. Per single charged fan, which is central as regards to other fans, four empty fans are drilled, after charging and blowing dumped ore is loaded, and then canopy 12 is created in the ore body hanger by stowing the resulting space with consolidating stowing material. After consolidation, block reserves are processed under canopy 12 protection, thickness h of the canopy being determined according to formula: h = L2ρ"P"/2000σ"R")sinα, where L - block slip, m; ρ"P" - canopy material density, kg/m3; σ"R"- canopy material tensile strength, MPa; α - ore body slope angle, degrees.

EFFECT: said invention provides for less labour intensity and improved output of stoping.

5 dwg

FIELD: mining, particularly underground thick ore body mining with chamber excavation system with goaf filling at large depths in the case of elevated rock pressure.

SUBSTANCE: method involves cutting unloading slot (slot raise) along ore body strike and before chamber stock excavation initiation in massifs of chambers of the first, the second and the third stages; filling the unloading slot with shrinkage ore; connecting unloading slot ends with cleavage cracks in different stages, wherein the cleavage cracks are formed by drilling wells of 100-112 mm diameters spaced apart 1-1,2 m apart along stage boundaries between sublevels so that each second well is blasted. As lying wall and hanging wall converge ore massifs of the first, the second and the third stages are shifted and slide one relatively another along with partial pillar breakage in unloading slots. To block filling material penetration through slot raise excavations passing through pillars, concrete bridges are erected in the slots. After than chambers of the first stage are cut and filled. After drilled cross-drift cutting the second and the third stage massifs are broken on previously driven slot raises.

EFFECT: increased mining safety and filler, improved stability of the first, the second and the third stage ore massifs, as well as contact massifs of lying and hanging walls.

1 dwg

FIELD: mining industry.

SUBSTANCE: method includes conditional separation of levels on chambers, which are made in form of stretched upwards hexahedron and placed in staggered order, at each lower level with displacement for half of chamber width in comparison to upper one. Preparation of each lower level is performed by driving field drift of main level, from which entries to ore deposit and orts to hanging side of deposit are driven, from orts ascending drifts are made and cut with cutting slits. For extraction of field resources a field sub-level drift is driven, entries and ore sub-level drift near lying side, from where orts are driven, from drift well fans are drilled and main resources of level are exploded through cutting slit. Outlet of ore from each chamber is performed through ends of outlet mines in main and intermediate levels. After removing main resources inter-level block is destroyed and ore from it is removed through entries of main level.

EFFECT: higher efficiency.

2 dwg

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