Reconstruction method for pit having two ore bodies arranged one near another
FIELD: open-cast mining, particularly for mineral mining in the case of vertical ore body confined in plane view, particularly kimberlite pipes.
SUBSTANCE: method involves spacing common pit edges at intermediate stage along with new edges creation, wherein the new edges are formed of triple ledges with stability provision parameters so that the ledges are separated one from another with safety berms; creating transport descent for double-path large dump truck movement; creating U-turn platform and annular transport descends at finishing stage, wherein annular transport descends provide opposite single-path dump truck movement and are joined one to another at U-turn platform; constructing pit edges in superhigh ledges in steep ore body pitch areas; transporting ore to plant and conveying gob to extreme refuse heaps. At pit finishing stage U-turn plate forming is accompanied by transfer platform creation. Steeply inclined descent and U-turn platform are created below transfer platform along rock pillar between pits. The descent is created through the full pillar depth. Ore bodies are alternately cut with steeply inclined end descents having thicknesses providing double-path crawler dump movement. Ore and gob of the first pit are transported to transfer platform. Then ore is loaded in dump trucks. Gob is piled on the second pit edge. After total the first pit excavation gob of the first and the second pits is arranged in the worked-out space of the first pit. Inclined galleries are cut along rock pillar base to provide drain water passage from the first pit into another one.
EFFECT: increased efficiency and mineral mining completeness.
1 ex, 1 tbl, 4 dwg
The invention relates to the mining industry and can be used for the development of the open method of mineral deposits with a vertical drop limited in terms of ore bodies, in particular kimberlite pipes.
There is a method of reconstruction of the career, including the spacing of the pit at an intermediate stage of construction of the new boards that are generated internal ledges with parameters that are valid on their sustainability, and divided by a safety berm, the formation of the transport exit a loop form, route and device divergent sites in places of change of direction of technological transport. At the stage of finalizing transport communication feature in one part of the career field, quarry work, leaving the ore pillar, by excavation of rock between him and the marginal contour of the pit and gradually form osypnoi Congress in the developed space before joining the Congress on the limiting circuit. After connecting transport congresses produce the final reorganization of the Congress by ore pillar and Refine the ore pillars, and the wall of the open pit to a height of ore pillars repay without transport conventions, with the formation of only the safety berms between the slopes dual, triple ledges (A.S. USSR 1710754, AS 41/26. Pic is b reconstruction quarries. N. Kuznetsov et al. Application No. 4776731/03 declared 04.01.90, publ. 07.02.92, bull. No. 5).
The disadvantage of this method is the necessity of multiple rearrangement in the process of finalizing career to the design of the bottom of the transport communications, located on the ore pillar. This reduces the intensity of mining and increased time for completion of the remaining ore reserves. In addition, the distribution of ore pillar outside repaid pit (in the Central part of the career fields) dramatically narrows the scope of the formation of the front for the development of mining, and the development of two contiguous ore bodies with different quality of minerals, the location of the ore pillar hinders involvement in the primary ore with a higher mineral content, which reduces the production output. In addition, this method does not allow you to leave between the pitwall rock pillar, i.e. not to reduce the amount of overburden in the pit. Given the short period of standing terraces on the stages of refinement, the disadvantages of this method include the development of safety berms separating repaid dual, triple ledges in the bottom part on the ultimate career path. To ensure complete extraction of valuable ore requires an increase in the volume of Stripping is about the spacing of the pit to accommodate these berms. And ensuring the continued transport links with the lower horizons career is only possible when forming tsepnykh congresses that fill a large area of the bottom of the quarry. The above factors affect economic performance and reduce the production efficiency of surface mining, and, in addition, reduce the safety of operations.
The closest in technical essence and the achieved result is a way of reconstructing career with two adjacent ore bodies, including at the intermediate stage of the spacing boards General career with the new offset flanges formed internal ledges with parameters that are valid on their sustainability separated safety berms, formation of transport conventions for two-way movement of heavy trucks on the stage of completion of the formation of topping pad and the ring transport congresses opposite direction with a single movement of trucks, mating topping on the Playground, with the offset of the pit in places steep fall of the ore body ultra-high ledges, transportation of ore to the mill, and waste - in external dumps. At the stage of finalizing transport communication is placed in a part of the career fields in one of the ore bodies, the revision to the design depth of the lead with the left is the group of ore pillars, gradually form osypnoi Congress in the developed space before joining the Congress to limit the pit and Refine the ore pillars layers, due to the repayment of transport congresses built by ore body (Patent RF 2230192, AS 41/26. The method of reconstruction career with two adjacent ore bodies, application No. 20022127530/03 declared 14.10.02, publ. 10.06.04, bull. No. 16).
The disadvantage of this method is the need to remove the entire volume of the overburden from the quarry, with the subsequent formation tsepnogo Congress, that requires significant resources and time. To avoid interruption of the ore for the period of construction tsepnogo Congress is necessary to perform accelerated testing of ore in the project outline and preliminary accumulation of stock of ore in amounts sufficient to supply the mill with the ore. The need for accelerated career opening and forming tsepnogo Congress costly events that lead to the great irregularity of mining operations and the increased need for mining equipment. In addition, completion of the ore pillars will be carried out in difficult conditions on a limited band spacing, and geomechanical stability of the pit will be significantly reduced due to outcrops of the array to greater heights. All this reduces the efficiency of production is surface mining, worsens economic performance and safety.
The technical result of the invention is to improve the efficiency and completeness of extraction of minerals by reducing the volume of overburden and shoulder its haulage by increasing the safety of operations.
This objective is achieved in that in the method of reconstruction career with two adjacent ore bodies, including at the intermediate stage of the spacing boards General career with the new offset flanges formed internal ledges with parameters that are valid on their sustainability separated safety berms, formation of transport conventions for two-way movement of heavy trucks on the stage of completion of the formation of topping pad and the ring transport congresses opposite direction with a single movement of trucks, mating topping on the Playground, with the offset of the pit in places steep fall of the ore body ledges convexo-broken profile, ore transportation to the factory, and waste rock in external dumps, at the stage of completion in addition to topping area form reloading the site, below which the rock pillar between the quarries construct a steeply Congress on the depth of its inception, and the turning point, ore bodies producing the turn steeply deadlocked congresses width, providing two-way movement of caterpillar dump trucks transport the ore and waste rock first quarry to the transshipment site, ore overload in dump trucks, waste rock stockpiling on Board a second career, and after full testing of the second pit waste rock first and second pits are placed in the mined-out space of the first career and the base of the rock pillar are inclined tunnel to bypass drainage water from one career to another.
With a steeply Congress between pits is formed with a longitudinal slope 300-360 ppm, and non-Board rock pillar between quarries form ultra-high ledges convex-polygonal profile height 60-180 m
The opportunity at the stage of finalizing the alternate opening of the ore bodies are steeply inclined stub congresses, leaving rock jumper provides greater stability of the pit in the bottom part through the creation of the stop (thrust) between the pit wall with a substantial reduction in the amount of overburden rocks and a considerable reduction of haulage shoulder. This eliminates the need for facilities tsepnogo Congress, and the configuration of the bottom of the pits without the presence of ore pillars and the contents of the bottom of one of the quarries in the dry state can improve the completeness of extraction of reserves and the efficiency of mining mestorozhdeniy is.
Forming a steeply Congress between careers with longitudinal slope 300-360 ppm on the calculated depth, with parameters calculated for the movement of tracked dumpers, with the formation of topping platform provides the movement of tracked dumpers in both career that allows maximum use of the career space, to improve the completeness of the extraction of minerals and significantly reduce the cost of excavation and transport of overburden.
Outside Board of the rock pillar between the quarries form ultra-high ledges convexo-polyline (polygon) profile height 60-180 m For forming the convex-polygonal profile of the slope of the ledge produce contouring of the top of the wells at an angle of 75°drilled on 2/3 of the total height of the ledge, and the delineation of the remaining 1/3 of the height of the bottom of the wells at an angle of 90°drilled from the soles of the penultimate horizon of the ledge.
The method is illustrated in figure 1-4.
Figure 1-2 shows the location of mining operations at the end of the first testing career in plan and section a-a In figure 3-4 shows the location of mining operations at the final stage of completion of a second career in plan and section a-a, where:
1 - the first quarry;
2 - the second quarry;
3 - ring transport conventions opposite direction with single heavy Veh movement the importance of dump trucks;
4 - pivot area, which joined the ring transport conventions opposite direction;
5 - handling space;
6 - rock pillar;
7 is a steeply Congress between quarries on the rock pillar;
8 - pivot area, which form a steeply stub congresses;
9 is a steeply stub conventions for opening the first and second pits;
10 - caterpillar dump truck;
11 - heavy haul trucks;
12 - temporary dump on the free Board of the second career;
13 - internal dump of the first and second pits;
14 is inclined vodopropusknye galleries.
An example of a specific implementation.
Field Tr. "Good" is represented by two steeply dipping individual ore bodies 1 and 2, split rock bridge (as a whole). Development stages is the total depth of the quarry. The design depth of the pit is estimated to be equal to 610 m
In the process of working out the rock mass in the contours of intermediate stages of field development on the depth of the pit edges "Good" formed internal ledges angle slopes 60-75°separated safety berms required width and transport congresses track of spiral shape with the calculated longitudinal gradient and sites mitigation of slope. The width of the congresses to a depth of 40 m provides two-way movement of heavy vehicles. Preparation of rock to excavation is carried out drilling and blasting method, then the rock mass ship excavators in dump trucks and transported: ore - processing plant, waste rock in external dumps.
Below a depth of 400 m (reworks) opening career plank exercise annular exit 3 which are joined at a depth of 490 m with the device turning the site 4. The pit form ledges convex-polygonal profile with a height of 45 feet, While the upper part of the ledge height of 30 m is formed at an angle of 75°, the lower height of 15 m at an angle of 90°. At a depth of 400 m in the area of turning the site 2 form reloading pad 5 sizes, providing a device transshipment warehouse ore. Below transshipment site 5 on the rock pillar 6 transversely to the bottom of the quarry construct a steeply-lane exit 7 between careers with a longitudinal slope of 300 ppm to a depth of 550 meters
The depth (H) two-lane exit on the rock pillar is determined by the formula:
wherep.p-- the width of the rock pillar, m;
WPP- the width of the loading platform, m;
Wsettlement-- the width of the divergent sites, m;
I - longitudinal slope transport of Congress, ppm.
If the width of the rock pillar 300 m, width distortion is offered by the platform 50 m, width turning the site 50 m, and the longitudinal slope of 300 ppm, the depth two-way transport of Congress on the jumper will be:
Therefore, the Congress on the rock pillar, you can start from a depth of 490 m to a depth of 550 meters
At a depth of 550 m satisfied with turning area 8, below which form a two-way steeply stub congresses 9 on each of the sides of the pit to a depth of 610 meters Outside Board quarries form ultra-high ledges convex-polygonal profile height of 60 feet, the Upper part of the ledge height of 45 m form an angle of 75°, the lower height of 15 m at an angle of 90°. The depth of institution two-way transport steeply stub congresses 9 is determined by the formula above, and is for quarry 60 m, i.e. conventions quarries will be opened with a depth of 550 m to a depth of 610 meters
The ore reserves carried out alternately. Initially producing mining first career 1 to the design depth, and transportation of rock mass to transshipment site at a depth of 490 m exercise caterpillar dump trucks 10. Then the ore overload heavy trucks 11 and transported to the beneficiation plant and waste rock stockpiling temporary blade 12 on the free Board of the second career 2.
After full testing of the second pit waste rock first and second pits in the amount of 4.5 million m3placed in mined-out space of the first career with weights outside ledges by forming the inner blade 13. When the technological requirements for flooded quarries at the base of the rock pillar 6 are inclined tunnel 14 counter pledging to bypass drainage water from one career to another, which in turn allows to contain the bottom of each of the pits dry.
This table presents data confirming the effectiveness of the proposed method compared to traditional methods.
The effectiveness of the proposed method of reconstruction of the career compared to traditional methods
|The methods of reconstruction of pit||Ore production, million tons||Stripping volume, million3||Volume of dumping the overburden, million3||The volume of transport work, mldm||The period of working out, years|
|The proposed method||12.5||4.5*||no||165.0||5|
The proposed method can reduce the amount of overburden in the circuit to which Riera by 1.5 million 3that will be preserved in a rock pillar, tackledirect Stripping pits in the amount of 4.5 million m3in the inner blade of the first pit, refuse facilities tsepnogo Congress and to reduce the volume of transport work on 315.0 mlnd that gives savings in the amount of 2.2 billion rubles in Addition, the period of development of the reserves is reduced by 2 years and the opportunity to Refine career without reducing the production of ore and to provide greater security of mining operations by increasing stability Board and the possibilities of alternate content quarries in the dry state.
1. The method of reconstruction career with two adjacent ore bodies, including at the intermediate stage of the spacing boards General career with the new offset flanges formed internal ledges with parameters that are valid on their sustainability separated safety berms, formation of transport conventions for two-way movement of heavy trucks on the stage of completion of the formation of topping pad and the ring transport congresses opposite direction with a single movement of trucks, mating topping on the Playground, with the offset of the pit in places steep fall of the ore body ledges convex-polygonal profile, transportation of ore to the mill, but is empty then the dy - in external dumps, characterized in that at the stage of completion in addition to topping area form reloading the site, below which the rock pillar between the quarries construct a steeply Congress on the depth of its inception, and the turning point, ore bodies produce alternately a steeply deadlocked congresses, width, providing two-way movement of caterpillar dump trucks transport the ore and waste rock first quarry to the transshipment site, ore overload in dump trucks, waste rock stockpiling on Board a second career, and after full testing first career emptythe breed first and second pits are placed in the mined-out space of the first career and the base of the rock pillar are inclined tunnel to bypass drainage water from one career to another.
2. The method according to claim 1, characterized in that a steeply Congress between pits is formed with a longitudinal slope 300-360 ppm.
3. The method according to claim 1 or 2, characterized in that the outside Board of the rock pillar between the quarries form ultra-high ledges convex-polygonal profile height 60-180 m
FIELD: mining, particularly excavation of hard rock in confined environment demanding prevention of blasted rock cuttings falling under high ledge slopes, namely during re-activation of temporarily unworked edges of deep pits, spacing sides of deep rock excavations in road building and so on.
SUBSTANCE: method involves separating high ledge into layers so that each layer has height not exceeding excavation equipment digging height; preparing the layers for following blasting by arranging light-weight woven mat with weight on side slope of high ledge below layer to be blasted; drilling blast-holes in each layer; filling blast-holes with charges, wherein blast-holes, which are outermost from side slope, are filled with decreased charge; arranging two-layer gas-permeable covering on all opened surfaces of area to be blasted, wherein lower end of the covering is made of metal mesh, upper one is created of mats formed of worn-out car tires; inserting lower covering part under mat for distance of not less than tire diameter; blasting rock; removing covering and excavating cut rock.
EFFECT: prevention of rock fragment dispersion under high ledge slopes during blasting works performing and rock excavation.
FIELD: mining, particularly open cast kimberlite pipe mining.
SUBSTANCE: method involves mining ore body by hydromining device of floating dredger; supplying diamond-containing pulp to floating dressing plant, recovering diamonds and transporting reject material from pit to preliminarily prepared plate for following utilization thereof. Ore body is developed by hydromining device reciprocation across total ore body area. Diamonds are recovered by serial pump decomposition, sizing, dressing and conditioning. Residual material is utilized by dewatering thereof in centrifuge and stacking for following usage for building material production.
EFFECT: simplified method and rig and decreased power inputs for kimberlite pipe development.
2 cl, 2 dwg
FIELD: mining, particularly for underground mining of steeply-dipping and inclined ore bodies having low and high thickness, as well as streaks.
SUBSTANCE: method involves separating stages and substeps in pit side slope; constructing deep pit with steeply-dipping side slopes in hanging and lying ore deposit walls, wherein side slope direction vary up to vertical direction at final stage; cutting zones in upper horizons and constructing the first continuous transportation path made as conveyer lifting means in trenches as pit is excavated; moving upper conveyer lifting means to new pit side point of upper stage when shifting to other mining stages at central and deep horizons and constructing conveyer system in trench located in central horizon; mounting conveyer lifting means at vertical side slope reinforced with polymers, bolts and mesh along with deep horizon excavation so that curvature of formed stable side sections correspond to surface and path of continuous ore and capping rock transportation from lower horizons to upper ones, wherein increasing shear loads in material to be transported are accommodated in conveyer structure by control of pull system and pressing means of tape drive mechanism. Device for said method realization is also disclosed.
EFFECT: increased operational efficiency, decreased costs of ore and capping rock delivery from deep pit.
2 cl, 1 ex, 10 dwg
FIELD: mining, particularly to create high dumps during open pit mineral mining.
SUBSTANCE: method involves forming preliminary dump layer near outermost deep pit outline with the use of cyclically acting means at optimal rock transportation shoulder; digging out steeply inclined semi-trench in pit side in overburden rock location zone and in direction of pit outline sections of the first, the second and the third excavation orders from depth corresponding to optimal vehicle operation height; creating embankment on surface by forming a number of transversal transport paths made as temporary dumps having heights increasing to preliminary dump mark so that embankment is at predetermined angle to preliminary dump; mounting crushing machines on main haulage level inside pit; installing in-line conveyance means in trench and in preliminary dump; covering thereof with light-weight snow-protection tent. Dumping operation is performed in parallel runs from stacking conveyor, wherein rock is received with inclined boom-mounted mechanism of plate feeding means arranged in tube-shaped structure supported by sliding supports so that the structure may rotate in place of structure connection with stacking conveyer. Boom length is selected from inclined dumped rock layer thickness to provide minimal dump settlement in unloading device installation place. Dump embankment forming for main conveyer of the second order is continued by preliminary dump forming within design dump outline by means of in-line conveyance means and by rock stacking on dump and by cyclic means. After that the second and the third dump layers are constructed. To prevent dump deformation rock layer stacked in winter is covered with snow-free buffer rock so that said layers have equal thicknesses. As central and deep pit zones are developed main conveyer is enlarged by installing new crushing equipment section on the second haulage level formed in permanent side. Conveyer path enlargement is continued with the use of steeply inclined and vertical conveyers to provide threshold distance of rock conveyance to crushing unit by collecting transport specified by optimal collecting transport operation.
EFFECT: increased dumping efficiency.
1 ex, 5 dwg
FIELD: mining, particularly safe refuse disposal during deep laying kimberlitic pipe excavation in extreme northern permafrost zone conditions.
SUBSTANCE: method involves constructing protection dam of overburden and creating water-tight screen of loamy soil; stacking waste and rock mass of different types inside protective dam; dumping rock in layers along with layer slopes and berms creation. Each protective dam layer is formed along finite outline. Water-tight screen is covered with zeolite layer to neutralize poisonous gas. Rock saturated with brine is stacked inside formed bowl in direction from layer periphery towards center thereof. As layer is filled with brine-saturated rock the layer is covered with zeolite layer. Then upper layer is formed in the same order. After all layer dumping termination slopes are treated to impart variable geometry thereto and the slopes are covered with sapropel. Dump has elliptical configuration oriented depending on wind rose.
EFFECT: increased efficiency and safety of aggressive brine-saturated rock dump stacking and storage.
1 ex, 2 tbl, 5 dwg
FIELD: mining, particularly opened development of horizontal and gently sloping mineral deposits.
SUBSTANCE: method involves cutting next to last overburden bench; providing explosion to shift rock to goaf during above cutting operation; forming road over shifted rock; performing transportation of rock cut from next to last bench; transporting rock remaining after explosion out of ore body outline along with rock bench slope cleaning and ore body roof cleaning; removing remaining cone with bulldozer; digging-out pit along contact line between ore and shifted rock; mining mineral and transporting thereof along temporary ore-transportation road formed over shifted rock pile.
EFFECT: increased efficiency of deposit development, increased discharge coefficient, decreased distance of next to last bench and mineral rock transportation.
7 cl, 2 dwg
FIELD: mining industry, possible use during open combined excavation of bed deposits with two coal formations with alternating extraction of formations and parting and technology of stripping operations based on transporting and non-transporting excavation system.
SUBSTANCE: in accordance to invention, at predetermined sections usable for processing parting in accordance to transport-less dragline technology, special dumping vessels are created and moved for required value towards excavated space, meant later for excavation of parting rocks into them. Volumes and amount of these vessels is determined depending on mining conditions and parameters of stripping equipment. Therefore, a part of volumes of transport stripping is redistributed to non-transport stripping.
EFFECT: lower costs of stripping operations and less harmful blowouts into atmosphere from vehicle transport.
1 ex, 1 tbl, 1 dwg
FIELD: mining industry, in particular, technology for extracting mineral resource deposits, possible use for extracting ores of balance and over-balance resources during extraction of mineral resources.
SUBSTANCE: method includes preparing the massif, supplying reagents, draining solutions, sedimentation of useful components. Ore sections of useful components are detected in massif beyond limits of pit contour above the level of depression cone. These massif portions in pit sides are subjected to explosive crushing, well is drilled to upper area of each prepared ore section, and then lixiviation solutions with reagents are fed into the well. Solutions, self-flowing downwards along ore section, lixiviate metal and then enter common flow of underground waters, formed by depression cone. Sedimentation of metal is performed in the pit on geo-chemical barrier, in place of common exit of subterranean waters.
EFFECT: ensured fullness of extraction and high efficiency when completing a formation in accordance to open method.
3 cl, 2 dwg
FIELD: mining industry, possible use mainly during extraction of argillaceous placers by open method.
SUBSTANCE: method includes mechanical shrinkage of mass and extraction of sands using digging-transporting equipment. Shrinkage of mass is performed with creation of crowns, and extraction of sands is performed by cutting off aforementioned crowns.
EFFECT: increased recovery of useful components from argillaceous sands of mass, containing large pieces.
4 cl, 8 dwg
FIELD: mining, particularly opencast mining of mineral deposits in the case of limited vertical ore bodies, for instance kimberlite pipes.
SUBSTANCE: method involves forming pit sides having inclinations less than minimal possible ones to provide pit side stability; preparing rock for further excavation by drilling-and-blasting operations; transporting ore and overburden via main incline by wheeled vehicle; forming transfer point plate at the second stage; excavating up to design depth along with forming pit sides having maximal possible inclinations, which provide pit side stability; cutting main incline from transfer point plate, wherein inclination thereof is increased in longitudinal direction; cutting ore pillars of the first stage; forming pit side having high ledges; forming lower ledge along ore body outline; forming temporary incline in one pit part; transporting ore and overburden to transfer point plate by means of caterpillar vehicle; forming temporary incline to provide pit cutting to design depth and cutting ore pillars under temporary incline.
EFFECT: increased efficiency of deposit excavation due to reduced overburden volume within the bounds of deep limited pits.
3 cl, 1 ex, 1 tbl, 4 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