Method for dredge work of placer deposits
SUBSTANCE: method involves stripping in the contours of industrial reserves, reducing the thickness of productive deposits by cutting them to a depth, sufficient to mine out the remaining part with the dredge, moving the cut off productive deposits into the trench and dredging the prepared stocks. In this case, the trench is formed on unproductive areas located along the travel of the dredge, and the cross-section area of the cut off rocks of productive deposits in the trench is established from the ratio of the volume of these deposits and the length of the unproductive area. And the trench is formed with a depth, which ensures placement of productive deposits with the maximum permissible thickness for the dredge with the minimum allowable width of the face.
EFFECT: increase the productivity of stripping and mining equipment by optimizing the parameters of the dredge, including by controlling the size of the sand bulks in the trench.
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.
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
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
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.
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
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.
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.
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.
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: 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.
FIELD: mining industry, particularly for open-cut steeply dipping or inclined deposit development.
SUBSTANCE: method involves excavating pit up to design depth reaching by sliced benches; moving the benches as ore deposit is developed; cutting ore and debris; loading thereof on conveyance means to move ore to ground surface, wherein as pit is deepened conveyer systems are used; on reaching the design pit depth deposit is divided into slices and the slices are developed with minimal ore losses in triangular zones with negligible interaction in peripheral face by developed slot raise technology usage; reinforcing slopes with anchors and metal mesh at deep horizons where berm cleaning is difficult; performing slice cutting though the full ore body thickness at design pit bottom and conveying the cut ore to surface by steeply inclined conveyers and combined transportation means. In the case of ore development in slices having lesser thickness below pit bottom steeply dipping and vertical side part are built, concrete wall and metal mesh adapted to hold wedge-like lumps in the presence of potential caving, wherein in this case mining equipment is used and ore cut from underground layer is crushed in crushing mills located on main loading and transportation horizons and delivered to ground surface by conveyer or skip shaft. Mined-out space is filled with rock refuse at terminal stage.
EFFECT: increased efficiency of mineral extraction, reduced cost of deposit development.
8 dwg, 1 ex
FIELD: mining industry, as well as hydraulic, road, agriculture and other building, particularly to perform open cast mining and other woks by rock loosening.
SUBSTANCE: method involves obtaining information concerning main and structural-and-strength rock properties on the base of estimation of data of primary and post-authorization prospecting, as well as production prospecting; detailed rock zoning to separate production blocks and unit blocks characterized by uniform rock at borders thereof; writing computer program; automatically loosing rock of each unit block by most effective method, namely by mechanical, pneumatic, blast drilling or physical one performed with the use of all-purpose mobile rig tools. Above rig includes computer system, device provided with one, two or three replaceable teeth, with plate-like metal pins and with hydraulic cylinders. The rig also has device adapted to create holes in unit block and wedge out thereof, drilling device and charging device, laser charge initiation system, local shelter with damping means, device for rock cutting by applying pressurized air and impacts to rock and auxiliary excavation device.
EFFECT: increased efficiency of rock preparation for further cutting and loading and for solid mineral field development as a whole.
FIELD: mining industry, particularly to develop watered placer deposits and technological mineral deposits under permanent negative temperatures of ambient air.
SUBSTANCE: method involves performing preparation and production works, mineral processing and refuse stacking operations. To implement above method dam is built around mining equipment and deposit to be developed prior to air temperature reduction to negative value; installing sled-mounted hangar having transparent heat insulated roof over the dam and performing all above mentioned works and operations inside the hangar.
EFFECT: increased efficiency of production and processing equipment.
2 cl, 1 ex
FIELD: mining industry, particularly for co-developing salt and platinum deposits.
SUBSTANCE: method involves detecting presence of platinum in non-soluble salt residue salt during salt deposit development; performing geological mapping of salt-bearing cavity and determining sand distribution in stratum above salt layer; drilling wells and bore pits and taking samples to determine platinum content; contouring sand deposits bearing platinum with concentration suitable for industrial development; cleaning surface; blocking out and excavating platinum-bearing sand; directing above sand to gravity separation plant; tying thereof with water in gravity separation plant to separate platinum therefrom.
EFFECT: increased complexity of deposit development.
FIELD: methods of surface mining, particularly for following natural stone treatment by covering or impregnating thereof with liquid or other flowable substances on surface.
SUBSTANCE: method involves gunning salt pit surface with waterproofing agent; covering salt pile surface with clay-and-salt mud layer in dry and hot season after salt pile hardening in at least 1.0-1.5 months after pile filling with salt. The clay-and-salt mud is sylvinite ore-dressing waste obtained from chemical factory. The clay-and-salt mud layer has 10-20 mm thickness and is formed by gunning salt pile surface with above mud material. The clay-and-salt mud is supplied into pneumatic pump receiver, wherein solid/liquid phase ratio is 1:2 - 1:3.
EFFECT: increased efficiency of salt pile waterproofing.
FIELD: agricultural; devices for treatment.
SUBSTANCE: the invention is pertaining to the field of clarification of water at the industrial development of the placer deposits with utilization of the wastes of the timber loggings and extraction of the finely dispersed gold from the water runoffs of the gold mining. In the bed of the diversion channel they form the firebreak out of the filtering material containing the wood sawdust mass subjected to the preliminary sorting at the vibration installation and having the ratio of the fractions from 1 to 5 mm up to the fraction from 5 up to 15 mm as 1:3 and packaged in the netted forms made out of the wire skeleton. After the water clarification the wood sawdust mass is subjected to dehydration by pressing and to drying and incineration for extraction of the fine fractions of gold. The technical result of the invention is the increased efficiency of the water clarification and extraction of gold.
EFFECT: the invention ensures the increased efficiency of the water clarification and extraction of gold.
FIELD: mining industry, possible use during extraction of natural and man-made gravel deposits of both mineral resources of high density (gold, platinum, etc), and valued minerals of low density.
SUBSTANCE: method for softening and disintegration of argillaceous sands of gravel deposits includes driving a water-feeding trench, driving a water-collecting trench in 80-100 meters along direction of fall of deposit bed in parallel to water-feeding trench, depth of water-collecting trench providing for difference of bottom levels in trenches 1,5-3 meters, filling water-feeding trench with water and recharging it to maintain constant water level by means of gate and spillway with raised spillway gate, building walling dam 1-1,5 meters high, limiting the part of deposit being processed in plan, with spillway, after that outputs of filtration flow into water-collecting trench are constructed which are fixed by wetting of upper slope for height of 1-2 meters, then spillway gate is lowered onto spillway spine, and that part of deposit is flooded with water for depth of 0,8-1,3 meters and this level is maintained for initial softening of argillaceous sands of gravel deposits, after that dredger plant is assembled, consisting of suck-in line with suction device, dredger itself and force sludge duct. At the end of force sludge duct, vortex generator is mounted together with hydrodynamic cavitator, due to which during launch of operation of dredger plant argillaceous sands of gravel deposits along the way from face and suction device of dredger to hydrodynamic cavitator are subjected to second stage of softening and disintegration, and in hydrodynamic cavitator - to third-stage final disintegration, and then are dispatched to dressing plant.
EFFECT: increased productiveness and extraction efficiency during extraction of natural and man-made gravel deposits due to efficient softening and disintegration of argillaceous sands of gravel deposits and release of valued components during hydro-transportation of sands to dressing equipment.
FIELD: mining industry.
SUBSTANCE: said geotechnological complex incorporates a trestle with a tumbling bucket, a tumbling module with a chute located inside the closed loop of trench for disintegrated rock accumulation. The chute is directed along the rock inflow. The tumbling bucket installation provides for possibility of linear and angular displacement in the vertical plane; the bucket has slots and L-shaped rippers.
EFFECT: improved efficiency of mining due to intensification of disintegration of rock with complex physical and mechanical properties during dredging and placer mining.
FIELD: mining industry.
SUBSTANCE: said complex is provided with a supported trestle and an ultrasonic and mechanical tumbling module. Rotatable ultrasonic radiation module is connected to movable carriage rim by means of a hub and sliding supports. The movable carriage is provided with a drive for moving it along the trestle cross beam and a drive for turning the ultrasonic radiation module around the movable carriage yoke axis. The rotatable ultrasonic radiation module has drives for moving the ultrasonic sources in the vertical plane, a dual drive for moving the ultrasonic sources in horizontal plane, sensors to determine the rock physical and mechanical state, and communication links with functional module of disintegration process automatic control system.
EFFECT: improved efficiency of mining due to intensification of disintegration of rock with complex physical and mechanical properties during dredging and placer mining.