Method of open mining of mineral deposits with forming of dump with large volume and height in difficult conditions
SUBSTANCE: invention relates to the method of open mining of mineral deposits with creation of a dump. The method includes separation of career space by zones, height and pit perimeter, cutting of ledges and horizons on which overburden and mining works with removal of rocks by truck or by rail into dumps and via ore chutes to reloading points are conducted, and dumps are built up using the cyclic action facilities. Meanwhile a convex form of a working edge is formed, gradually being fitted into the edge differentiated by steepness on a final contour which is built up in view of minimum disturbance of walls of slopes and a edge according to the technology with minimum consumption of explosives (E) with removal and dumping of rock into a main dump located near a zone of overburden works outside a contour of a steep edge of a pit of the 1st phase; initially temporary dumps are used with self-transportation of rocks outside a pit, and with their partial re excavation, provide the minimum shoulder of tramming of rocks and ore using the crushing reloading points and conveyors from inclined planes on the top horizons to the steep and vertical at completion of a pit. And with deepening of mining operations the overburden zone is divided into two sites and rock is moved by combined transport from two sides into a dump under construction parallel to a edge slope in view of deformation of its separate sites, and rock dumping on a dump after crushing is carried out by line transport facilities using the mobile console, the minimum shoulder of tramming of rock and ore and costs of development of mountain weight on the first and the subsequent stages (turns) are ensured, and the first two layers of a dump are dumped according to cyclic and line TsPT technologies using motor transport or loaders (at re-excavation of rocks) that provides stability and robustness of the dump front according the developed technology of dumping, at the final stage the third layer is dumped, and the fourth layer of dump if necessary, according to its calculated volume and height and limit depth of a pit.
EFFECT: improvement of efficiency of field development during construction of a dump with large volume and height at decrease of costs of stripping and improvement of safety of dumping.
There is a method of development of the field deep in the quarry with the creation of dumps large capacity beyond career field application of road and rail transport .
The disadvantage of this method are considerable distances to waste disposal and, as a consequence, large development costs mineral properties.
The known method of dumping of large capacity in the development of Nagorno-field application mainly road transport .
The advantage of this method is that it applies to trucks with a lifting height of 400-600 m from the dump sites located at a distance of 2-4 km from the quarry, which causes significant costs to transport the rocks to the final platform.
Closest to the proposed to the technical essence and the achieved result is the method of development of the field deep in the quarry with the use of cyclic-flow technology (CCM) .
The disadvantage of this method is that it is necessary to construct pretotal in the quarry I-th queue in the creation of the CCM and its subsequent transfer for career paths at the end of testing.
The aim of the present invention is to increase the efficiency of field development in the construction of high dump large capacity is ri reducing the cost of moving overburden and security of dumping.
This objective is achieved in that in the known method open pit mining of mineral deposits with the creation of the dump large capacity and height, including the division of career space zones, the height and the perimeter of the quarry, cutting ledges and horizons, which are development and production operations with hauling rocks road, and sometimes by rail in the dumps and through the ore chutes at the transshipment points, and dumps build a small height mainly by means of cyclic steps, characterized in that the parameters set career not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit and work lead with the lowest coefficients of overburden, create the convex shape of the working edge, gradually blending into differentiated by the steepness of the Board on the final circuit, built with the minimum disturbance of the walls of the sides and the Board by special technology with a minimum consumption of explosives (e) hauling and dumping rocks into the main blade which is placed near the area of conducting Stripping for the path steeply inclined side career of the I-th queue, use original temporary stockpile is with semitransitive rocks abroad career and with their partial preexcavation, provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to steeply inclined and vertical when finalizing career, and with the deepening of mining overburden zone is divided into two sections and move the breed combined transport with the two sides in the construction of the blade parallel to the slope of the Board, taking into account the deformation of its separate parts, and dumping rocks on the blade after crushing carried out by means of a flow of transport, for example, the use of mobile console, provide the minimum haulage shoulder rocks and ores, minimal development costs of the rock mass on the first and subsequent stages (queues)and make the filling first two tiers of the blade combined technologies CCM with the use of vehicles or loaders (if preexcavation rocks) that ensures the stability and sustainability of the dump in front of the developed technology of dumping, at the final stage occiput third, if necessary, and the fourth tier of the blade in accordance with its estimated capacity and height and maximum depth of the pit.
The advantage of the proposed method of field development with the creation of the blade height and capacity is that initially, the placement poro the Stripping is done at sites near and inside the final career path with offset part of dumps for the contours of the final quarry (temporary dumps) with partial preexcavation and create a master multi blade directly at the end of the path, and when it is dumping use an embankment causing the area with a filling of pretotal for the CCM using slopes. When applying the CCM on the overburden and ore (ore passes) is the minimum distance of the shoulder transportation of rock mass from all areas of field development, and the proposed technology dumping rocks with regard to geological and climatic factors ensures the safety of operations.
In the drawings, Fig. 1-4 shows the main fragments of the development of the field in dumping high dump large capacity.
Fig. 1. The outline of the ore body in the quarry top-down (in section):
1 ore body; 2 - slope side project; 3 - the proposed slope side; 4 - secondary breed overburden; 5 - working Board.
Fig. 2. The layout of the blade near the quarry (broken): 2 - slope side project; 3 - slope side (proposed); 6 - predator the slope of the blade on the project, a temporary dump; 7 - the slope of the blade (offer).
Fig. 3. The layout of the piles relative to the career path (plan):
8 - pit; 9, 10, 11 - advanced dumps; 12 - strip-blade, 13 - outlines the construction of the blade 7; 14, 15 - ore chutes; 16 - crushing mobile node; 17 - conveyor line.
Fig. 4. The layout of crushing complex (ATC) in the developing and secondary transportation of overburden rock in the dump:
16 - crushing mobile node (mobile); 17 - conveyor line; 18 console when unloading rocks downhill; 19 - the slope of the blade.
An example of a specific implementation of the method
The method can be implemented on existing Coachinc.com career Apatite-nepheline ores East of the mine and construction career Central mine of OJSC "Apatit", forthcoming working side of the ore body East Rasvumchorr".
At the first stage of the career options set not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit and work lead with the lowest coefficients of overburden, create the convex shape of the working Board 5, gradually blending into differentiated by the steepness of the Board 3 on the final circuit, built with the minimum disturbance of the walls of the sides and the Board by special technology with a minimum consumption of explosives (e) hauling and dumping rocks into the fixed blade 7, have near a zone of doing Stripping for the path steeply inclined side career of the I-th queue 3.
For this quarry 8 I-th stage (stage) with sides lying flank deposits of 1 enables opening of the trench and carry out the cutting ledges on overburden and ore with increasing the camping steepness desktop Board 5. Works are in the direction of the end side 3 career, build a Fort with increasing steepness, respectively, increasing the strength of the rocks arrays (declining fracturing with depth). The rock overburden is transported to predator 6 within the boundaries of I-II stages of development of the ore body 1, additional dumps 9, 10, 11, or barrow for transporting rocks cyclic-flow technology (CLT), use the original temporary dumps with semitransitive rocks abroad career and with their partial preexcavation provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to steeply inclined and vertical when finalizing career. With increasing shoulder haulage of rock and ore up to 4-5 km arrange crushing and handling paragraphs 16 and separate Stripping zone into two areas and build the first and the second tiers of the blade 7 with the contours 12, 13 parallel to the slope of the sides 3 by dumping rocks on two sides with regard to the possible deformation of the sections of the blade with minimal shoulder haulage and application of the console 18, and the ore is achieved by the construction of the ore chutes 14, 15, passable, including across the ore body. Cost minimization reach those that used mobile crushing system 16 with maximum performance on the basis of the cone d is abilock (breed) or jaw during low productivity of ore and trucks at low shoulder haulage rocks or ores (for example, 0.4 to 0.8 km (bucket capacity E=12-16 m3especially when preexcavation rocks (secondary Stripping) 4.
With the deepening of mining low-inclined conveyors 17 (angle α=15-16°) is replaced by inclined (30-40°), and in the course of deep zones rebuild parts of the Board 3 with the slope of 60-70°, and use of steeply inclined conveyors (SIC), when finalizing career apply vertical conveyors, which are used crusher (cone) secondary crushing so that the height of the delivery of the remaining part of the ore accounted for Assembly of motor vehicles of about 200 m, on rock finished third tier of the blade 7, and if necessary, the fourth tier with minimal shoulder haulage rocks. Volume dumps can be 250-400 million meters of rocks in the production of over 200 million tonnes of ore. So the quarry can be completed to a maximum depth with a minimum expenditure of national economic resources.
The source of information
1. Khokhryakov B. C. Design standards. M.: Nedra, 1980.
2. Ryzhkov, A. N., Okanovic A. C. Second life Plateau Rasvumchorr. M: Mining magazine. No. 7. - 2009. S. 46-51.
3. RF patent №2310077. Method of forming high tier blade. Publ. 10.11.2007. Bull. No. 31 (prototype).
The method of open pit mining of mineral deposits with the creation of the blade, including the division Kari is REGO space areas, the height and the perimeter of the quarry, cutting ledges and horizons, which are development and production operations with hauling rocks first by road or rail in the dumps and through the ore chutes at the transshipment points, and dumps build by means of cyclic steps, characterized in that the parameters set career not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit, and work lead with the lowest coefficients of overburden, create the convex shape of the working edge, gradually blend in differentiated by the steepness of the Board on the final circuit, built with the minimum disturbance of the wall jambs and Board technology with a minimum consumption of explosives (e) hauling and dumping rocks into the main blade which is placed near the area of conducting Stripping for the path steeply inclined side career of the I-th queue, use the original temporary dumps with semitransitive rocks abroad career and with their partial Paretskaya provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to a steeply and the slight pressure from the beginning when finalizing career, with the deepening of mining overburden zone is divided into two sections and move the breed combined transport with the two sides in the construction of the blade parallel to the slope of the Board, taking into account the deformation of its separate parts, and dumping rocks on the blade after crushing carried out by means of a flow of transport travelling console, provide the minimum haulage shoulder rocks and ores and development costs of the rock mass on the first and subsequent stages (queues), and make the filling first two tiers of blade cyclic-flow technology of the CCM with the use of vehicles or loaders (if preexcavation breeds) that ensures the stability and sustainability of the dump in front of the developed technology of dumping, at the final stage occiput third, if necessary, and the fourth tier of the blade in accordance with its estimated capacity and height and maximum depth of the pit.
SUBSTANCE: after performance of drilling and blasting operations in an overburden bench during layer-by-layer excavation of the blasted rock to an extended bench and a final blade circuit on the formation roof of the mineral deposit within excavation heading throughout the length of the slab there left is a layer of the rock with negative temperature. This allows developing a zone of stable freezing, warming it up and strengthening it by action of solar insolation during development of the upper part of the breakdown. The rest rock layer is excavated to a final blade circuit after disposal of the upper part of breakdown throughout the length of the excavation slab.
EFFECT: reduction of influence of repeated freezing on productivity of a drag line and provision of its stable operation during excavation of blasted rocks of an overburden slab.
3 tbl, 2 dwg
SUBSTANCE: method involves positioning of an automated complex for deep development relative to the working face considering the direction of ore bodies settings. Control of mine rock parameters is performed by means of control sensors of physical and mechanical characteristics of mine rocks for adjustment of a mine rock cutting force considering rotation speed of a working element and movement speed of the working element in a vertical plane throughout the cutting depth and cutting direction by means of hydromechanisms of telescopic retraction and a turning mechanism of the head section. Width of capture of the ore body plane in a horizontal direction is provided by means of the positioning mechanism of the complex relative to guides; with that, information on circuits of destructed mine rock is sent from control sensors of mine rock circuits to a system control unit.
EFFECT: increasing productivity, improving reliability and enlarging technological efficiency of destruction of rocks of different strength and coherence degree by controlling a cutting force in a zone of processing and formation in a surface layer of the processed massif of destruction zones considering strength characteristics of rock.
2 cl, 3 dwg
SUBSTANCE: method involves driving of permanent and working trenches, installation of downhole and main transport pipelines, extraction of a mineral deposit with wedge-shaped producing blocks. Driving of a working trench is performed by means of a parallel cut throughout the length of an open-pit field, and direction of a mine work front line is offset in a circumferential direction, the centre of which is a stationary rotary station of transport pipelines with radius R equal to maximum width of excavation cut to observe parallelism of the axis of transport pipelines to the mine work front line. The formed angle αi between radius R and the line of the main transport pipelines is determined from a mathematical expression.
EFFECT: improving efficiency of a fan development system.
SUBSTANCE: method involves general-purpose robot-aided mobile complexes for production, extraction, preparation and processing of mineral raw material and concentrates, a unit of automated control of operation of a mining mill, a technical system for advancing, current and prompt reception of mining and geological information. Fully automated reception of mining and geological information is performed based on build-up of a digital model using a software, cyclic-flow destruction of hard rocks and half-rocks by means of a safe shallow blast-hole drill-and-fire system and flow-through soft rocks - by means of a mechanical method, adaptive and deep differentiated separate mechanised extraction and loading of mineral and rock mass of different categories, types and grades, through-type separate ore preparation in all technological operations, selective primary benefication of mineral raw material using an adaptive gravitational technology and a physical and chemical combined technology, separate processing of concentrates at the final stage using metallurgical methods.
EFFECT: improving development efficiency of small ore and non-metallic deposits of gold, lead, stannum and other mineral deposits.
SUBSTANCE: method involves construction of annular transport ramps of opposite direction with single-lane traffic of dump trucks docking in turning platforms, reloading points, construction of open pit sides with triple projections at an inclination angle of 60÷75°, which are separated with safety berms of required width, formation in some part of the open pit field of one of ore bodies of transport ramp (TR) with width providing for two-lane traffic of dump trucks and adjacent to turning platforms, production of ore for both ore bodies by means of a drill-and-fire method so that pillars are left in the open pit sides; delivery of ore to a factory; stripping - to external dumps, construction of underground mine workings and a water drain system; the modification stage involves reconstruction of the eastern side of the open pit (VRT) with partial processing of its pillars and transshipment of dead rocks into an internal dump, change of some part of single-lane transport ramp along the eastern side for a steeply inclined one, transportation of ore from lower horizons of the open pit with articulated dump trucks (ADT) to the transhipment area, transhipment into large dump trucks for delivery to the factory, and creation of a rock cushion at the open pit bottom. Besides, first, from the lower turning platform in the worked-out area of the western side of the open pit (ZRT) there dumped is the main ramp, thus providing transport communication throughout the depth of the open pit; at the open pit side reconstruction stage, a two-lane ramp is in-series formed with projections with a vertical slope and berms of minimum width and rebuilt into a ramp with an increased inclination in opposite direction; a new dump ramp is formed from the turning platform in the south-western part of the open pit; water drainage is relocated to an inter-pipe zone; TR of opposite direction with single-lane traffic along the western side is put out; TR with an increased slope is constructed from the upper turning platform in the north-western part of the open pit; ZRT pillars are mined out; the new dump ramp is enlarged, and loading and transportation of some part of ore is performed from it at mining-out of ZRT pillars by equipment with remote control (RC) to a transhipment point; another part of the ore is transported to VRT bottom, thus creating an ore cushion, and after ZRT pillars are additionally mined out to technologically practical depth, VRT pillars are broken out onto the ore cushion, thus putting out the transport ramp.
EFFECT: improving efficiency and completeness of development of a mineral deposit by an open-pit mining method.
9 cl, 4 dwg
SUBSTANCE: invention refers to the mining industry and may be used during extraction and processing of molybdenum-containing ores. A method for extraction and processing of molybdenum-containing ores involves open-pit field zoning, outlining of solid ore sections different by processing characteristics, selective extraction on the outlined sections with ores allocation to separate the flow from the zones with increased molybdenite oxidation and its direction to luminescent separation. A powellite enriched product of separation after its size degradation is directed to bulk floatation obtaining a rough molybdenic concentrate. Then after molybdenite oxidation in the rough concentrate, powellite is leached in an environment of a molten mixture of chloride and sodium silicate. The tail product of separation after its size degradation is directed to bulk floatation obtaining the molybdenic concentrate.
EFFECT: increasing a level and quality of molybdenum extraction to the end product from balance molybdenum ores with higher degree of molybdenite oxidation.
SUBSTANCE: in order to enlarge the range of simultaneous processing and versions of control of a cutting force in the processing zone, formation of destruction zones is performed considering strength characteristics of rock as to width of the processed surface at variation of functional and technological parameters and their rational combination under conditions of selective development of deposits with complex structures. Strength characteristics of rock are fixed by mine rock strength recording sensors connected through a system block to a control system of operation of hydraulic cylinders, and drum balance is provided by distributed offset of hydraulic cylinders. Pressure of working liquid in piston cavities of the hydraulic cylinders is designed for a force required for rotation of turning levers.
EFFECT: increasing productivity, improving reliability and enlarging technological efficiency of destruction of rocks of different strength and coherence degree by controlling a cutting force in a zone of processing and formation in a surface layer of the processed massif of destruction zones considering strength characteristics of rock at selective development of deposits with complex structures by means of open-pit surface miners.
2 cl, 6 dwg
SUBSTANCE: method describes the selection of sections in the zone of wind currents, drilling of ledges by wells, charging them with explosive charges, blasting and excavation of the blasted mined rock. Meanwhile only upper ledges are drilled without subdrilling to the design outline of the edge profile, and charging and blasting of wells is performed stage by stage by blocks to the profile height. The correlation of the angle of incidence and profile of the open pit edge and the dominating wind speed under the mathematical formula is determined.
EFFECT: improvement of performance of ventilation of open pits and coal strip mines by ensuring of continuous streamlining of edges of open pits and coal strip mines by a natural air flow.
1 tbl, 3 dwg
SUBSTANCE: proposed method comprises removal of covering access rock at blast loosening by charges with air cushion in the charge lower end, mechanical loosening and push loading of rock, its piling and loading by excavator into carriers. Blast holes for access rock are drilled in mineral formation to the depth of air cushion at the charge bottom end. Single blasting is performed in well-by-well manner by the system of nonelectric initiation. Every second or third blast well is drilled in mineral formation of decreased hardness.
EFFECT: higher efficiency of destruction, power saving at mineral loosening.
2 cl, 2 dwg
SUBSTANCE: engineering-geological and hydrogeological survey is carried out to detect available landslide bodies. Then biolocation survey is performed, using the results of which they detect underground watercourses and discover their characteristics for detection of quantity and location of through filters. Afterwards on the surface of a ledge or a slope or a hillside outside the landslide body a header is arranged for collection of surface waters and some shallow watercourses. Afterwards from the foot of the ledge or the slope or the hillside they arrange a drainage mine deep into the ledge or the slope or the hillside outside the landslide body, from the surface of the ledge or the slope or the hillside they drill vertical wells until coupling with the drainage mine for through filers, couplings are arranged with connection chambers, through filters are lowered into vertical wells from the surface, and through filters are made in the form of pipes with perforated sections of holes and filtering elements made at the coupling level with underground watercourses. The header and the drainage mine are arranged with an inclination of i=0.005 towards the drain for self-flow of captured water.
EFFECT: provision of reliable prevention of landslide formation due to complete drainage of surface and underground waters from a landslide body.
2 cl, 3 dwg
FIELD: mining art, in particular, open-pit mining of mineral resources by high benches.
SUBSTANCE: large-diameter single holes are replaced by a pair of divergent holes of a smaller diameter, in which one hole is always vertical, and the other one is inclined towards the bench; the single holes of the larger diameter are replaced with a pair of divergent bundles of parallel converged holes, in which one bundle is vertical, and the other is inclined towards the bench; the single holes of the larger diameter are replaced with a pair of divergent holes of a smaller diameter, in which one hole is vertical, and the other is inclined towards the bench and positioned in the vertical plane parallel with the first one and distant from it by 1-2 hole diameters; the single holes of the larger diameter are replaced by a pair of divergent bundles of parallel converging holes, in which one bundle is vertical, and the other is inclined towards the bench and positioned in the vertical plane parallel with the first one and distant from it by 1-2 hole diameters.
EFFECT: enhanced efficiency of blasting of the benches.
7 cl, 6 dwg
FIELD: mining industry.
SUBSTANCE: method includes dividing quarry on rows, of which first one is extracted to planned depth with external dump-forming, and extraction of following rows is performed with use of internal dump-forming, placing dug rocks to extracted space of adjacent row with common displacement of dump front with development of mining operations. Second and following rows of quarry are divided on basis of height on extraction levels, extraction of uppermost level is performed with placement of dug rocks in upper dump level of extracted space of adjacent row, using surface transporting communication lines, and during extraction of second extractive level dumping of dump level of inner dump is primarily performed by forming pioneer dump at longitudinal processed edge of quarry, on upper area of which transporting lines are placed and dumping of dump level is performed from there, with descent of mining operations in working area of extractive level profile of upper dump area is altered to provided necessary cargo communications of working horizons of extractive level to dump level, after extraction of extractive level remaining pioneer dump is dug to upper mark of following extractive level, and extraction of following extractive levels is performed analogically, using reformed upper area of pioneer dump.
EFFECT: higher efficiency.
FIELD: mining industry.
SUBSTANCE: method includes cutting steps with varying angles. Angles of double step slopes, different on basis of quarry depth, are formed with consideration of decrease of irregularity parameters with deposit depth, with natural block level of upper horizons and influence from mass explosions and wind erosion of rocks with gradual increase of their steepness until forming of vertical slopes of double steps during additional operations in quarry, while angles of slopes and edge portions on upper horizons in highly fractured rocks may be 50-55°, in rocks of average and non-specific fracture levels - 70-60° and in low-fractured rocks may be 80-85°, and edge portions 60-90 m high in deep portion of quarry with vertical double steps and preventive berms 10 m have slant angle 80-85°.
EFFECT: higher efficiency.
6 dwg, 1 tbl, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes extraction of quarry to planned depth with use of quarry ore chutes with accumulating bunkers, cutting ore chutes with deepening of mining in quarry, crushing ore blocks and pieces from face from bunker walls by explosives, loading ore to railway vehicles, cutting and shutting upper portion of ore chutes at each level when mining approaches there is performed by division on beds and semi-shelves with charges in wells, providing for crushing of rock to needed dimensions and safety of mine walls, and further decrease of pieces size and increasing efficiency of ore chute operation by excluding ore suspension is achieved by use of crushing assembly in form of bowl with plate at base, working as anvil under layer of rock, from where ore mass is self-propelled to bunker, and from there by feeder is sent to crusher and further through intermediate conveyer to main conveyer.
EFFECT: higher efficiency.
4 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes extracting quarry to planned depth by ore and rocks extraction by displacement of shelves along horizons with transferring to crushing plants, crushing rocks and then delivering them by lifting device to the surface, during extraction of quarry to planned depth at first stage during construction of board at the end of quarry in zone of decrease of power of deposit in stable rocks conveyer rope system is constructed, connected to hoisting machine, to bed with recesses, allowing to raise crushed material to large height at steep angle and with deepening of mining and displacement of crushers to lower horizons conveyer system is extended to provide for optimal transport shoulder for gathering vehicles.
EFFECT: higher efficiency, higher productiveness.
2 cl, 6 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes opening deposit of mineral resource along its length, extraction of opened rocks in shelves, forming on one of the portions of deposit of forward extracted space reaching planned bottom, moving rocks to external dumps and into extracted space, processing and transporting of mineral resource. Deposit extraction is performed in two directions - perpendicularly to length of deposit with deepening and along length to quarry bottom, while volume of extraction of mineral resource along length is increased and volume of extraction of resources perpendicularly to length is proportionally decreased.
EFFECT: higher efficiency.
2 cl, 3 dwg
FIELD: mining industry.
SUBSTANCE: method includes serial extraction of drifts with placement of opened rocks of drifts in extracted space of previous drifts, continuous combined processes of softening, extraction and movement of rock to dump. Drifts are positioned along cut trench, extraction is performed by adjacent horizontal shavings of face area, rock of each drift is moved by throwing directly to extracted space and compacted in range by realization of kinetic energy of rock.
EFFECT: higher efficiency.
FIELD: mining industry, applicable for slanting of high benches at development of magmatic deposits of mineral resources by open pit.
SUBSTANCE: the method includes drilling of contour holes for formation of a screening peephole, buffer and breaking holes to a depth corresponding to the height of one working subbench with a redrill, the middle row of breaking holes is made with an incomplete drill, charging of the openings and their blasting, dispatch of the rock, after blasting first of outline openings, for formation of the screening peephole, and then of breaking holes and mucking of the rock, similar operations are performed on the underlying subbench of the lower high bench, at the development of the lower high bench, the development of the upper and lower benches is conducted by doubling of the working subbenches, at the development of the lower subbench of the upper high bench the outline openings are drilled to the whole height of the doubled bench, the buffer openings are drilled at a distance of 12 to 13 diameters of the charge from the outline openings and to a depth at least corresponding to the height of one working subbench with a redrill equal to 6-8 diameters of the charge, the first and last rows of the breaking holes are drilled with a redrill, equal to 4-5 diameters of the charge, and the incomplete drill of the middle row of the breaking holes makes up 7-8 diameters of the charge, after blasting of the buffer and breaking opening and mucking of the rock a crest is formed, from whose surface on the side of the slope outline and buffer openings are drilled, the first ones - to the height of doubled subbenches, and the second ones - to the height at least of one lower working subbench, then the breaking openings to the same height as in the above - and underlying subbenches and for production of a natural protective bank on the upper section of the lower high bench in the section of the berm the formed ridge is liquidated by drilling, charging and blasting of the openings of small diameter and depth.
EFFECT: enhanced stability of high benches on the outline of the open pit.
2 cl, 3 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes opening deposit at distance 150 meters from river and forming of natural filtering wall between river and trench, pumping of water from trench into river, extraction of mineral resource, revegetation of dumps, filling of trench with water, accomplishment of formed water body. Mineral resource is extracted from two serially opened trenches - auxiliary, revegetated as water body, and main, positioned at opposite side of river, and soil from opening of which is used for revegetation of auxiliary trench, while in main trench along whole board on the side of river right beyond mining operations inner dump is formed with width not less than 250 meters and with height at same level with earth surface, water from trenches is fed into river, and then into water body through intermediate collectors, while after forming of water body currents of soil waters between trenches and river are made balanced, balance level is estimated on basis of water levels in auxiliary trench and river.
EFFECT: higher efficiency.
1 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes extraction of quarry to planned depth in stages with construction f boards with parameters, allowed from stability condition, shutting boards, finishing mineral resource massif. Building and shutting of temporary boards during extraction of steep layers of next level after change of order of extraction of opening and ore zones is started after construction and spacing in center of cut of well-like mine with vertical shelves, with parameters, which are provided for by minimal radiuses of rounded edges enough for movement of rock via spiral chutes to surface to outer dumps, with narrowing space towards bottom at level of opened level of deep portion of deposit with lesser total coefficient of opening of stage and finally board is constructed by steep vertical shelves in deep zone.
EFFECT: higher efficiency.
1 ex, 10 dwg