Clay mineral deposits development method

FIELD: mining.

SUBSTANCE: development method comprises opening-up of developed field reserves, ditch driving along the whole length of the production block, water flooding of the production block for disintegration of clay sand and their subsequent improvement by the production complex with installation of pressure of head hydraulic transportation and concentration plant. Before grooving of slits by cross-cut and longitudinal passes of slit-cutting unit, and also water flooding of the production block for disintegration of clay sand and their subsequent improvement, using experimental and analytical methods the bending compression and tension characteristics of high clayey sands in various locations of placer deposits are determined. The dynamics of change of elastic characteristics in these sections is determined, the correlation of response curve of resiliency of sand at water saturation of separate sections of the field with the relative wave resistance of sand in these sections is studied, and grooving of cracks at the distance from each other depending on the change of response curve of sand resiliency of at water saturation is performed.

EFFECT: achievement of high level of disintegration of clay sands difficult for wash-out, minimising of process losses of valuable component and decrease of mining expenses.

3 dwg

 

The invention relates to the mining industry and can be used in the development of high-clayey alluvial deposits.

There is a method of development of clay minerals [1]. The method includes opening working stocks, their layer-by-layer in the recess parallel trenches, leaving Miranshah pillars, enrichment and dumping. Between the first trench and circuit are working stocks together with additional ditch in which water is supplied, when the sinking of subsequent tranches water sequentially fill each of the previous trench. After sinking the last of the trench field flooding and practice microsavia pillars using a dredge or dredge and mining produce in the direction from the first trench to the last.

The disadvantages of this method is the large amount of excavation the excavation of ditches, as well as a considerable amount of work on the movement of sand in the ditch.

The known method of placer developments [2]. The method includes opening the Sands, their seizure and transportation in the hopper wash plant, ore dressing and dumping. Before transportation of sand in the hopper wash plant them warehoused in a ditch, traversed by the center of the placers along the length of the mining block to a depth below the level of p is cwy reservoir Sands and filled with water. Sand is placed in the ditch below the water level, and their subsequent seizure conduct underwater method.

The disadvantages of this method is also a large amount of earthworks and a considerable amount of work on the movement of sand in the ditch.

The closest in technical essence is a way of softening and disintegration of clayey Sands shallow placers, including the opening of deposits, sinking vodozabornoy trench with a slope in the direction of drop formation deposits and drainage trenches, filling water vodozabornoy trench with simultaneous filling of the developed area placers water and maintain this level in subsequent to initial softening clay Sands with water supply and the implementation of the natural process of water filtration in the array, the installation of pressure hydrotestosterone, installation of ultrasonic installation and mechanical installation, consistently intensify the filtration of water in compacted layers of sand by means of ultrasonic treatment on the Sands on the surface of the developed area, produce hydrodynamic activation by stirring the slurry element of the mechanical installation and the flow of slurry through the installation of pressure hydrotestosterone on ore processing plant [3].

The disadvantage Yes the aqueous method is a multi-stage process of disintegration, high energy costs and maintenance costs for the development of the Sands.

The technical result of this method is the high degree of disintegration trudnoponimaemyh clayey Sands, reduction of technological losses of valuable components and reduced development costs due to the formation in the surface layer of the processed array of high-clayey Sands cracks taking into account the dynamic characteristics of elasticity of sand at videosystem.

The technical result is achieved due to the fact that the way of the development of clay mineral deposits, including the opening of mined reserves, sinking ditch the entire length of the mining block, the flooding of the mining block water for disintegration clayey Sands and their subsequent mining mining complex with the installation of pressure hydrotestosterone and processing plant before cutting slits through the transverse or longitudinal passages seiretei installation, as well as flooding of the mining block water for disintegration clayey Sands and their subsequent testing, experimental and analytically determine the elastic characteristics of high-clayey Sands on the compression or tension in various parts of placer, establish the dynamics of change in the elastic properties of these uchastkah the formula:

G=(E*-E**)/B,

where G is the dynamic characteristic of elasticity of sand at videosystem, PA; E* - elastic characteristics or the modulus of elasticity of sand with an initial humidity, PA; E** - elastic characteristics or the modulus of elasticity of sand at high average content of water in the desert, PA; B - change of water content in arbitrary units relative to the percent, i.e., 1% is 1 unit, investigate the dependence of the dynamic characteristics of elasticity Sands G when videosystem in some areas of the field from the relative wave resistance of Sands in these areas;

G=f(ζ*/ζ**),

where ζ* wave resistance at initial moisture content of sand; ζ** wave resistance at high average water content in the sand, carry out the cutting of the slits at a distance from each other depending on changes in the dynamic characteristics of elasticity of sand at videosystem, and in areas with the lowest dynamic characteristic of elasticity of sand at videosystem the distance between the slits is reduced to a value that provides filtration rate and disintegration clayey Sands in proportion to the areas of maximum dynamic characteristic of elasticity of sand having a maximum distance between the slits, fill mining block water and by setting the pressure hydrotransport the cation serves the pulp to a mining complex with processing installation.

The combination of significant new features allows you to solve a new technical problem is to intensify the process of disintegration by the intensification of the natural process of water filtration in water-saturated layers of clayey sand with regard to the dynamics of changes in their physico-mechanical properties.

The process of the method of development of clay mineral deposits shown on the drawings.

In Fig.1 - General view of the development system placers, ensure the implementation of the method of Fig.2 is a view of A in Fig.1; Fig.3 is a diagram showing changes in the dynamic characteristics of elasticity Sands of gold-bearing placer deposits in the Amur region in videosystem (POS.1 - when videosystem Sands from 8.0% to 30% (R. Nagima); POS.2 - when videosystem Sands from 12.7% to 30% (and Paris. Mad); POS.3 - when videosystem sand from 20 to 30% (and Paris. Swampy)).

The implementation of the method is as follows.

Carry out an autopsy to be mined reserves 1, the driving of the ditch 2 over the entire length of the mining unit 3. Before cutting the slots 4 through 5 cross or longitudinal passages 6 seiretei 7 installation, as well as flooding of the mining block 3 water for the disintegration of clayey Sands and their subsequent testing, experimental and analytically determine the elastic characteristics of high-clayey Sands is as compression or tension in various parts 8 placers, establish the dynamics of change in the elastic properties of these areas 8 by the formula:

G=(E*-E**)/B,

where G is the dynamic characteristic of elasticity of sand at videosystem, PA: E* - elastic characteristics or the modulus of elasticity of sand with an initial humidity, PA; E** - elastic characteristics or the modulus of elasticity of sand at high average content of water in the desert, PA; B - change of water content in arbitrary units relative to the percent, i.e., 1% is 1 unit, investigate the dependence of the dynamic characteristics of elasticity Sands G when videosystem on separate sections 8 field 1 from the relative wave resistance of Sands on these sites:

G=f(ζ*/ζ**),

where ζ* wave resistance at initial moisture content of sand; ζ** wave resistance at high average water content in the sand (Fig.3).

In the research of gold-bearing clayey sand placer deposits in the Amur region and the assessment of changes in the elastic properties of clayey Sands, depending on the water content installed that changes the elastic properties of Sands are manifested in different ways with more or less monotonous, edge performance and are determined not only the initial values of water saturation, but also by the dynamics of the process. For example, in the Sands deposits R. Nagima dynamism you the e, than the stream. Crazy 2.3 times higher than in the Sands of the stream. Swampy is 6.6 times. The dynamics of the stream. Crazy compared to the handle. Swampy above 2.9 times (Fig.3). There is also a change in the dynamic characteristics of elasticity of sand at videosystem on separate sections 8 of the same field (Ref.1-3 in Fig.3), therefore, the cutting of the slits 4 is carried out at a distance of 9 from each other depending on changes in the dynamic characteristics of elasticity of sand at videosystem.

On sites of 10 with the lowest dynamic characteristic of elasticity of sand at videosystem the distance 9 between the slits 4 is reduced to a value of 11, providing filtration rate and disintegration clayey Sands in proportion to the areas 12 with maximum dynamic characteristic of elasticity of sand having a maximum distance 9 between the slits 4. To do this, carry out the adjustment of the distance 13 between the cutting bodies 14 seiretei 7 installation. After passing through the slits 4 fill mining unit 3 water. By setting the pressure hydrotestosterone 15 serves the pulp to a mining complex with 16 processing installation 17.

Sources of information

1. Patent No. 2355886 of the Russian Federation, IPC 6 E21C 41/30; E21C 45/00. The way of the development of clay mineral deposits / Kislyakov C. E., Nikitin A. C. No. 2007144476; Appl. 29.11.2007; publ. 20.05.2009. Bull. No. 1. - 6 S.

2. Patent No. 2353772 of the Russian Federation, IPC 6 E21C 41/30; E21C 45/00. The method of placer developments / Kislyakov C. E., Nikitin A. C. No. 2007138132; Appl. 15.10.2007; publ. 27.04.2009. Bull. No. 12. - 6 S.

3. Patent No. 2392054 of the Russian Federation, IPC 6 B03B 5/00; E21C 41/30. Method of softening and disintegration of clayey Sands shallow placers / Khrunina N. P., Mamaev Y. A. No. 2009115747; Appl. 24.04.2009; publ. 20.06.2010. Bull. No. 17. - 8 S.

The way of the development of clay mineral deposits, including the opening of mined reserves, sinking ditch the entire length of the mining block, the flooding of the mining block water for disintegration clayey Sands and their subsequent mining mining complex with the installation of pressure hydrotestosterone and processing installation, wherein before cutting slits through the transverse or longitudinal passages seiretei installation, as well as flooding of the mining block water for disintegration clayey Sands and their subsequent testing, experimental and analytically determine the elastic characteristics of high-clayey Sands on the compression or tension in various parts of placer, establish the dynamics of change in the elastic properties of these areas by the formula:
G=(E*-E**)/B,
where G is the dynamic characteristic of elasticity of sand at videosystem, PA;
E* - elastic characteristics of the sludge is the modulus of elasticity of sand at initial moisture content, PA;
E** - elastic characteristics or the modulus of elasticity of sand at high average content of water in the desert, PA;
B - change of water content in arbitrary units relative to the percent, i.e., 1% is 1 unit,
explore the dependence of the dynamic characteristics of elasticity Sands G when videosystem in some areas of the field from the relative wave resistance of Sands on these sites:
G=f(ζ*/ζ**),
where ζ* wave resistance at initial moisture content of sand;
ζ** wave resistance at high average water content in the sand, carry out the cutting of the slits at a distance from each other depending on changes in the dynamic characteristics of elasticity of sand at videosystem, and in areas with the lowest dynamic characteristic of elasticity of sand at videosystem the distance between the slits is reduced to a value that provides filtration rate and disintegration clayey Sands in proportion to the areas of maximum dynamic characteristic of elasticity of sand having a maximum distance between the cracks, fill mining block water and by setting the pressure hydrotestosterone serves the pulp to a mining complex with the processing unit.



 

Same patents:

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used at mining operations. Proposed method comprises drilling the row of test wells to fit downhole hydromining units therein and to washout minerals therefrom by fluid jets forced by said units for pulp to be delivered to surface. Drilled pipes are inclined in the plane perpendicular to spread of said row. Wells are drilled in a row to distance equal to double efficient length of washout jet while rows are spaced apart through distance equal to efficient length of washout jet. Washout is performed from wells towards hanging layer to form the face with hemispherical cross-section perpendicular to well axis.

EFFECT: reliable egress of minerals, washout at dried face.

3 cl, 9 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic process of coal production. Main and auxiliary openings are driven via tandem and/or single faces that delineate blocks, barrier and safety pillars. Water is forced into faces by pump stations after cleaning at drainage complexes, mechanised settlers and/or water headers. The latter are located in intercommunicated chambers located at lower points of hydraulic site blocks and exiting into accumulation openings via which hydraulic transport is performed and rock is discharged. Abandoned pillars are liquidated after working of extraction pillar at backstroke in tow-side or single-side cuts. Water is cleaned at mechanised settlers and/or water headers with application of combination of water cleaning technical means and processes. For this, used are, for example, water impermeable partitions with water bypass nearby bottom, thin-layer clarifiers, flotation, coagulation, water processing by constant pulsating current, etc.

EFFECT: working of coal at complex mining and geological conditions, lower costs.

4 cl, 2 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic borehole mining of minerals. Proposed method comprises opening of the deposit via central and peripheral wells, placing the equipment therein and opening of adjacent chambers in layers, from bottom to top, starting from peripheral chambers. Prior to opening of the next layer through the entire bed thickness, undercut chamber is formed nearby soil of formed chamber and, parallel with said layer, of artificial ceiling of hardening material with inclination to centre. Shrinkage of fallen rock and filling of opened space with hardening material, opening and backfilling of central chamber at development of every chamber. After making of said artificial ceiling, several hydraulic cuts are made over the height of temporary wells. After formation of undercut space, rocks are hydraulically fractured from lower hydraulic cuts to force fluid into fracture unless rock failure into undercut space. Caved rock is partially flooded by hydraulic fracture fluid and giants to wash out the rock. As rock disintegrates, pulp is fed to the surface. As magazine level drops below design mark, hydraulic fracturing is repeated from hydraulic cut closest to stripped area, shrinkage, wash-out and discharge of pulp. Then, said jobs are repeated unless stripped area reaches aforesaid artificial ceiling. Now, shrunk rock is completely washed put, pulp is discharged and stripped area is filled.

EFFECT: selective extraction, decreased losses of minerals and costs, lower environmental effects.

8 cl, 5 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises exposure of producing formation by production well equipped with jetting equipment and jetting of minerals. Nearby soil of developed strata horizontal drain hole is drilled for preliminary drying of working zone and creating conditions for operation of jetting in air. Note here that minerals are broken by jetting, gravity and increasing rock pressure resulted from underground water level decrease. This allows mining the minerals at strength of 3-5 MPa. Light grade well is drilled in vertical plane with drain well inclined to mouth to allow outflow of hydraulic mix by gravity and accumulated in settler. Operation of wells of hydromining complex is performed in turns. First, drain well is activated. After water level drop below giant jet nozzle, giant jet is activated. Minerals are mined by intervals in direction from bottom to mouth of operation well and with withdrawal of casing tubes.

EFFECT: higher efficiency of hydromining.

1 dwg

FIELD: mining.

SUBSTANCE: device comprises a machine with a hydraulic drive of reciprocal and return-rotary displacement, a two-channel tubular frame, a jet working element, a system to supply and distribute discharge liquid. The working element is equipped with the main and auxiliary jet-forming shafts with attachments and separated channels of discharge liquid supply to them. The main shaft is installed at the angle of 90°, and auxiliary shafts - at the angles of accordingly 45° and 3-10° to the longitudinal axis of the working element. Supply of the discharge liquid to channels is adjusted to a two-position distributor installed on the shaft of the hydraulic drive of return-rotary displacement.

EFFECT: simplified design, increased reliability of design, increased safety and efficiency of labour.

4 cl, 3 dwg

FIELD: mining.

SUBSTANCE: first preparatory field mines are driven - level haulage and ventilation drifts with identical geodetic elevations, block crossdrifts and accumulating drifts with an inclination for a self-flow transport, stripping wells are drilled at the right angle to the bed plane, then, line cuts are washed by the hydraulic method. Level haulage and ventilation drifts stretch at identical geodetic elevations to form a ventilation scheme with horizontal depression. The area of line cuts is increased to initiate the process of caving of a hanging massif in a stope. The stope bottom is formed by washing of line cuts with an inclination providing for accumulation of caved coal through self-flow. The caved coal is magazined to control shift of side rocks in the stope. Chambers that are adjacent to the mined space are separated by barrier sight pillars. Oversize material is crushed, and coal mass is periodically discharged in dosing manner into the accumulating drift to provide for stope bottom movement up the pitch.

EFFECT: elimination of air leaks through a mined space, reduced contamination of coal by caved rocks, higher reliability of breaking face functioning and labour safety.

2 dwg

FIELD: mining.

SUBSTANCE: system capable of using naturally reheated fluids produced from hydrothermal channels with the purpose to develop and use practically unlimited quantity of thermal energy contained in specified fluids. The system comprises the main system made of three parts: a funnel, pipe sections and any combination of several mechanical fixtures. The extracted thermal energy is used to drive steam turbines or other equipment for generation of power, which is transported to earth surface, water desalination or for any other production, requiring thermal energy. Besides, the specified thermal energy may simultaneously or separately be introduced into the extracting plant for extraction of resources in order to extract precious metals, mineral and chemical substances without system modification.

EFFECT: provision of a reliable mechanism for extraction of thermal energy from an ocean bottom and such precious resources as minerals, metals and chemical substances.

37 cl, 5 dwg

FIELD: mining.

SUBSTANCE: method includes exposure and development of reserves by open-cut method, exposure, preparation and working-out the reserves in cut edges by underground method, transportation of rock mass and maintaining protective pillars. When eliminating the front of open mining at safety distance there performed is an exposure of underground mining unit in cut edge that includes several beds. There passed are ventilation and pulp-haulage drift ways that are cut by pulp-haulage roadway, and from the surface there drilled are wells along coal beds till pulp-haulage roadway. Broken working is done from well upwards and downwards by hydraulic or drill-hydraulic methods, and pulp transportation is done by wells and pulp-transportation mines till draining complex.

EFFECT: invention allows increasing the coefficient of mineral resources extraction and reducing environmental losses.

6 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method consists in mining of the deposit with wells, creation of a cavity, and destruction and change-over of mineral product to hydraulic mixture. Mixture is mixed and hollow rock is deposited at the bottom of the formed cavity; coal-water suspension is pumped out to the surface and transported via pipes to the consumer. In order to destruct mineral product, high methane content of coal beds is used; at that, methane content in the formed cavity is controlled; and when the most explosion hazardous concentration of methane, which is equal to 10%, is achieved in that cavity, explosion is initiated. After mineral product is delivered to the consumer, the whole cycle of works is repeated. In order to prevent methane ignition, its concentration is reduced to explosion hazardous one by releasing methane via wells to the surface to consumers.

EFFECT: invention allows increasing the safety and efficiency of mine works owing to using internal energy of mine rock massif.

FIELD: mining.

SUBSTANCE: method includes mining of a coal bed by chambers in an ascending order by a hydraulic method from surface and using underground mines, drilling machines, hydraulic monitors, and also a hydraulic elevator. At first a well is drilled from surface to the bed at the side of the roof, where pipes are placed for the hydraulic monitor, hydraulic elevator and methane suction, afterwards coal excavation starts in a split slot. Then another well is drilled in the produced slot along the coal bed, where pipes are installed for the hydraulic monitor and methane suction. Besides, in process of coal excavation in a chamber along bed rise with usage of underground mines the coal pulp arrives to an accumulating drift, which replaces the hydraulic elevator. At the same time methane is also sucked along the pipes to the surface.

EFFECT: wider area of method application, higher safety of minerals mining.

4 dwg

FIELD: mining.

SUBSTANCE: method involves drying of tailing massif, identification of an outline of supergene-converted horizon, separation of thickness of tailings into non-productive lean tailings from upper part of technogenic massives, which are not subject to supergene changes, and productive gothite-magnetite-hematite horizons formed during supergene conversion of technogenic mineral raw material, removal of upper non-productive horizons, extraction of gothite-magnetite-hematite horizon and its processing so that iron-ore concentrate is obtained. Iron-ore concentrate with total iron content of more than 60% is obtained by means of a gravitation-and-magnetic or magnetic method from gothite-magnetite-hematite horizon saturated with iron, which is formed in thickness of aged tailings.

EFFECT: improving efficiency of complex development of iron-ore deposits and processing of wastes of iron-ore production; reducing anthropogenic load onto ecosystems.

2 cl, 2 tbl, 2 ex

FIELD: mining.

SUBSTANCE: method includes erection of a dam on a coastal shelf in a zone of tide with formation of tide water accumulator, installation of an enrichment device of a lock chamber into a dam body with the possibility of tide water overflow into an accumulator and back, extraction of sands of beach deposits, their transportation to surface of the dam with supply to the enrichment device and further washing with reciprocal overflow of sea water, removal of the produced concentrate at the minimum level of tide. The complex of processing of metalliferous sands of the coastal marine shelf comprises a hydraulic engineering structure in the form of a dam made with a marine water accumulator, an enrichment device of a lock chamber type, installed in the dam body to form a through reciprocal overflow of the tide sea water into the accumulator and back, a classifier installed above the lock chamber higher than the maximum level of tide. The lock chamber is equipped with a catching cover.

EFFECT: development of a method and a complex for processing of metalliferous sands directly in a coastal area of a marine shelf with reduction of costs for water treatment and water supply for the enrichment process.

2 cl, 6 dwg

FIELD: mining.

SUBSTANCE: in the method to mine gravel deposits, including contouring of balance reserves by data of exploration wells, opening of a sand bed, performance of opening and production works, after contouring of balance reserves the opening works are carried out with solid transverse trips into a dump to the level of the maximum elevation of the balance reserves contour. Production works are started by slabbing with a bulldozer in the area of the maximum elevation of the balance reserves contour with transportation of sands into a mined space. Each subsequent lifting of the balance reserves contour is mined in the similar manner, peats located between lifts of the balance reserves contour are transported through slabbing with secondary displacement into the dump.

EFFECT: reduced operational losses of a useful component.

2 dwg

FIELD: mining.

SUBSTANCE: method includes backfill in worked-out area of small-grain dump and further backfill of pebble dump on its surface using mined rock removed upon processing of solid placer and consequent extraction of material from dump removing particles of gold. Before re-processing of dump works for coarsening of gold particles sizes are performed. Before backfill of pebble dump silt-settling tank is formed in near-bedrock part of small-grain dump, for which purpose a barrier is formed on bedrock surface from water-proof, covering perimeter small-grain dump. After backfill of pebble fraction on surface of small-grain dump, dump is exposed during the time interval required for flushing of dump space by non-ramming water flows, then the dump is frozen preferably in two stages. Upon extraction of material from the dump its volume located above volume of silt-settling tank is removed without flushing. In order to flush volume of the dump by non-ramming water flows, natural water-borne sediments and/or forced feed of water to the dump surface is used. During formation of water-proof barrier water-proof film material is used in addition.

EFFECT: higher gold extraction efficiency during re-development of gravel deposits.

5 cl, 3 dwg

FIELD: mining.

SUBSTANCE: method for cleaning-up of ore bed reservoirs is performed by means of desalination. In this respect, hole-drilling of solid ore is performed, as well as its explosive rupture, filling of blasted capacity with working solution and egress of product solution. Besides, the outer configuration of blasted capacity is drilled around at an angle equal to slope angle of working ledge. Along the centre line of blasted capacity all the way down the cleaning-up of ore bed an efficient well is drilled. The rest of ore body is drilled around by closed parallel rows of vertical wells. While stable roach is being blasted, all the capacity of blasted ore bed, including its outside configuration, is drilled around by vertical wells of the similar depth.

EFFECT: ensuring stability of open pit side and rising safety level of mining operations.

3 dwg

FIELD: mining.

SUBSTANCE: method includes separation of sands by quality by means of establishment of upper and lower limits of a producing part with different content of a useful component, further, after development of sands using the method of preliminary separation of coarse fractions, high-quality sands are supplied for enrichment, and an intermediate process reservoir, where low-quality sands are stored, is used for natural separation of rock and metal minerals by density in water medium and concentration of a precious component in a lower layer, then the upper layer is removed, and the lower concentrate layer from the process reservoir is sent for enrichment. Low-quality sands pass through additional stage of useful component concentration by natural separation of minerals by density, at the same time gold particles are concentrated in the lower layer, and clayey particles go into drainage.

EFFECT: improved performance indices of sands processing, reduced losses of fine gold, lower processed volumes.

2 dwg

FIELD: mining.

SUBSTANCE: method involves delineation of balance and industrial reserves as per the data of exploration wells, drilling and mining activities; re-delineation of industrial reserves is performed after their delineation along the top of sands. At that, new contour at excavation of rock mass is set from cross point of exploration well with initial contour of industrial reserves at minimum elevation of balance reserves as to top of bed of sands to cross point of contour of balance sands-peat reserves at an exit angle of excavating transport vehicle of stripping equipment, and where there are no cross points of new contour with contour of balance reserves as to top of bed of sands - parallel to initial contour of industrial reserves.

EFFECT: reducing operating losses of useful component.

1 dwg

FIELD: mining.

SUBSTANCE: method involves stripping operations, excavation and transportation of sands with bulldoser to vibration screen with further feed of sands to the receiving sump and further transportation to mineral processing equipment. Receiving sump is formed in the form of a pit drilled to the rock bed along the circuit of reserves and longitudinally separated with a pillar into two semi-pits: one is meant for sand storage, the other one is meant for boulders; screen is installed on sand supply side with possibility of its being moved along the pit with an inclination providing boulder movement to the second semi-pit.

EFFECT: increasing the efficiency of mining equipment at development of boulder gravel mineral deposits owing to extraction of boulders to specially prepared space.

3 cl, 2 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to mining industry and may be used to develop natural and anthropogenic high-clayey gravel deposits of minerals with high content of fine and thin gold. The method of acoustic and hydraulic pulse softening and disintegration of high-plastic clay sands of gold-bearing placers includes placer opening, formation of an accumulator, softening of clay sands with the help of water supply and subsequent filtration process, assembly of a plant of discharge hydraulic transportation of the hydraulic mixture. Hydraulic washing of sands is carried out with subsequent free-flow supply of a hydraulic mixture into the accumulator and subsequent pressure hydraulic transportation of the hydraulic mixture to the system of washing and sizing, which is coupled with an additional accumulator by means of a mechanism that supplies the sized hydraulic mixture. Periodic acoustic exposure is carried out with directed radiation of 20 kHz frequency and intensity from 5 to 10 W/cm2 to a large-sized solid component of the hydraulic mixture in the additional accumulator before and after periodical hydrodynamic exposure of pulse loads generated in case of high-voltage electric breakthrough and producing voltage with exceeding the limit strength of the solid component of the hydraulic mixture depending on its water saturation. Number of charges is determined on the basis of the specific size of the largest piece.

EFFECT: increased efficiency of damage and disintegration of clay sands of placers.

1 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to mining and may be used in developing natural and technogenic placer deposits of natural resources with increased content of fine and thin gold. Proposed method comprises deposit opening, producing sump, weakening rocks by feeding water and filtration, and mounting pipeline transport of hydraulic mix with pumps with hydrodynamic cavitation agitator. Pre-loosened mined rock arranged in sump first section by bulldozer agitator is subjected to ultrasound at frequency of 20 Hz and intensity of 10 to 20 W/cm2. Water is forced into sump first section in amount making 0.15 to 0.3 of volume content of rocks lumps at porosity of 26 to 40% to act by ultrasound with 20 Hz-frequency and 10 to 20 W/cm2-intensity onto hydraulic mix and feeding said mix to system of jetting and grading with pre-disintegration by hydrodynamic cavitation agitator. Simultaneously with loosening mined rock in first section, second sump section is filled with loosened mined rock. Jetting and grading with barren rock and feeding hydraulic mix in additional sump are performed for additional saturation with water. Water is additionally fed into additional sump with the solid-to-liquid ratio of 3:7 to act by ultrasound with 20 Hz frequency and 10 to 20 W/cm2 intensity onto hydraulic mix solid component in additional sump.

EFFECT: higher efficiency and environmental safety.

2 dwg

FIELD: mining industry.

SUBSTANCE: device has screw, having transporting spiral ribbon held on the shaft. Equipment is provided with U-shaped chute and perforated drum with armature in form of screw ribbon, having curvilinear shape in cross-section, arched in the direction of movement. Drum is mounted in upper portion of U-shaped chute. In its lower portion a screw is mounted.

EFFECT: higher productiveness.

3 dwg

Up!