Excavation method of useful deposit at fan-like advance of scope of mining operations

FIELD: mining.

SUBSTANCE: in an excavation method of a useful deposit at fan-like advance of scope of mining operations, which involves advancing of a permanent and working trench, installation of transport communications, excavation of a useful deposit and overburden rocks by treatment of wedge-shaped blocks, according to the invention, development of wedge-shaped blocks is performed at two stages as per a shuttle-type scheme without any shifting of transport communications with preliminary formation of an advancing recess at a turning point of transport communications in the direction of the open-pit field boundary on condition of parameters of the advancing recess L, B providing minimum development of a wedge-shaped block by value Bmin.

EFFECT: uninterrupted production of a useful mineral along the whole scope of mining operations.

2 dwg

 

The invention relates to the mining industry, more precisely to open the developments of high-power fields in the application technique of continuous operation.

There is a method of open pit mining of mineral deposits, for the development of difficult structural fields with steep or sloping fall layers of different strength. Goal - improving the efficiency of the averaging of the rocks in the mine due to the possibility of quality control when blasting blasting rock bottom. To do this, hold the split trench and Orient it along the contact of rocks with pin inside the contour of the trench, which work out wedge-shaped benches. The width of zagadki set smaller than the width of a cutting trench. The top of the wedge is oriented in an array of rocks and placed on the contact rocks or the projection of the contact on the horizontal plane. The angle of the vertex of the wedge take around 80-90 degrees. Square Zachodni drilling of wells series, parallel, forming a wedge-zagadki. The wells are then charged and produce blasting rows of wells alternately from each side, forming a wedge-shaped section, and start blasting with hard rock. At the moment of explosion occurs layer-by-layer overlaying rocks one strength to another breed strength. When excavation of blasted rock additionally, the OPE is the situation of mixing different breeds strength [SU # 1652553 A1 from 23.11.1988, publ. 30.05.1991, IPC E21C 41/00].

This method of development is characterized by low efficiency associated with complex organization in working one part of the career fields with the use of a longitudinal system, and the other fan and periodic dredging "wedges" at the beginning of each zagadki.

The closest in technical essence and the achieved result is a method of open pit mining of mineral deposits, horizontal and sloping bedding powerful fields when applying the technique of continuous operation. This method involves the development of overburden, excavation of minerals and internal reserves, the development of overburden produce wedge-shaped benches with full notch wedge under the condition of parallelism of the lines of the lower inner edge of the blade from the mining zone, centerline course of the excavator during the mining of lower production pedostop ledge, the centerline of the stroke of the loader, the lower and upper edge of the lower mining ledge subsequent zagadki, axial lines conveyers for transporting mineral mining the lower and upper production podustov, the centerline course of the excavator when developing top mining pedostop ledge, the lower and upper edge of the upper mining ledge subsequent zagadki, settling the second traverse line overburden excavator, the lower and upper edge Stripping ledge subsequent schodki [RU No. 2394157 C1, E21C 41/26 from 26.05.2009, publ. 10.07.2010].

This method of development is characterized by low efficiency, excavation and loading complex in the wedge section.

The main object of the invention is to reduce the complexity, improve efficiency, stable performance, excavation and loading complex along the entire length of the front and the safety of mining operations.

This object is achieved in that in the method of extraction of minerals, with fan podviganiya front of mining operations, including the sinking of capital and cutting trench, installation of transport and communications, the notch of the mineral and overburden by practicing wedge-shaped blocks according to the invention the testing of wedge-shaped blocks is carried out in two zagadki on chelnokova scheme without shifting transport communications with the preliminary formation of advanced niche in the place of the turning point of transport communications in the direction of the edge career fields, provided the parameters of the advanced niche L, B, ensuring minimal testing of the wedge-shaped block on the value of Bmin.

The presence of advanced niche eliminates the problem of work, excavation and loading equipment in a narrow part of the excavation zagadki, and development of Klinova the but-operational unit in two zagadki on chelnokova scheme gives a smooth extraction of the mineral from the entire front of operations.

This method is illustrated by the following drawings:

Fig.1 - scheme of mining works at penetration advance niches

Fig.2 - development of wedge-operational unit of the first zagadki,

Fig.3 - development of wedge-operational unit of the second zagadki,

where 1 is the capital trench; 2 - split the trench; 3 - hole transport communications; 4 - main transport communications; 5 - wedge-shaped operating unit; 6 - anticipatory niche; 7 - turning point; 8 - border career fields; 9 - excavation and loading complex.

The method consists in the following. Using well-known technologies traversed capital 1 and split 2 of the trench, where the hole 3 and the trunk 4 transport communications. Excavation of overburden and fossil realized by means of a wedge-operational blocks 5. Before beginning excavation shaft of the operating unit 5 produces the driving of advanced niche 6 from turning point 7 in the direction of the edge career field 8 within the mining area in order to avoid performance degradation, excavation and loading complex 9 as a result of reducing the width of excavation zagadki. The parameters of the advanced niches are: width B is the maximum width of the excavation Zachodni; length L advance niches the passage is raised to B min- the minimum width of the excavation Zachodni in a wedge-shaped operating unit. After sinking advanced niche 6 is developing a shaft of the operating unit 5 in the direction of the edge career field 8. The development of the plot is carried out in two zagadki on chelnokova scheme without shifting transport communications. After excavation shaft of the operating unit 5, excavation and loading complex 9 ahead with developing a new niche 6 loading mineral to the backbone communication 4, simultaneously, is the shifting of the hole transport communications 3, which leads to the continuous supply of minerals, after which there is a repetition of the above process operations.

These technological solutions aimed at stabilizing the distance of transportation and uninterrupted production of minerals at fan system design.

The method of extraction of minerals, with fan podviganiya front of mining operations, including the sinking of capital and cutting trench, installation of transport and communications, the notch of the mineral and overburden by practicing wedge-shaped blocks, characterized in that the testing of wedge-shaped blocks is carried out in two zagadki on chelnokova scheme without p is rediske transport communications with the preliminary formation of advanced niche in the place of the turning point of transport communications in the direction of the edge career fields, provided the parameters of the advanced niche L, B, ensuring minimal testing of the wedge-shaped block on the value of Bmin.



 

Same patents:

FIELD: mining.

SUBSTANCE: method comprises making ramps on the border of working and final pit edges for heavy-duty dump trucks, with the placement of the ramp part on its width on the subrepose remnant of rocks, and on the other part - on the final pit edge. On the working pit edge parallel to the formed ramp for heavy-duty dump trucks the ramp is made for light-duty dump trucks. When it is impossible to locate on the board the ramp for heavy-duty dump trucks under conditions of decreasing with depth career space, a part of this ramp, located on the subrepose remnant of the rocks, is developed with transportation of rock mass to the surface by light-duty dump trucks on the ramp on the working pit edge. On the part of the ramp for heavy-duty dump trucks, located at the final pit edge the ramp is formed for light-duty dump trucks. The ramp for light-duty dump trucks from the working edge is moved to the final pit edge, with the formation on it of the steep ramp for movement on it of dump trucks with articulated frame. The rock mass from the steep ramp is transported to the surface on the ramp for light-duty dump trucks on the final pit edge. At the lower part of the pit under conditions of confined space the steep ramp for dump trucks with articulated frame is formed in a known manner.

EFFECT: improving the efficiency of the development of deep-seated deposits.

4 dwg

FIELD: mining.

SUBSTANCE: method comprises making a steep trench using a wheel loader and motor transport, capable to climb steep slopes. Making the trench is carried out in several stages, dividing the steep trench to steeply inclined-horizontal layers with height calculated by taking into account the motion trajectory of the loader bucket, which are mined successively downward. When mining each successive layer the rock mass is preliminary loosened, the loader carries out its withdrawal, delivery and unloading to the motor transport placed at horizontal areas as close as possible to the forehead.

EFFECT: improving efficiency of mining.

2 dwg

FIELD: mining.

SUBSTANCE: method comprises formation of the working area, the technology of mining of overburden benches and ensuring of load-transport communication of working horizons with the surface, mining of the overburden benches of the working area is carried out with excavators with elongated work equipment, taking the height of the benches equal to a sesquialteral height of digging of the excavators. At that, to prevent the collapse of deflectors and hangers on the bench slope above the height of the excavator digging the pre-splitting of its upper part is made by a) contour blasting or b) preliminary slit-formation, formation of the working area is carried out with the use of a cascade scheme of mining of overburden benches, at that the scope of work of each bench is divided to the passive with minimal working areas with a width that provides two-way movement of technology vehicles and its manoeuvring, and an active, working platforms of which include minimum working platforms, and volumes of overburden rocks ready for extraction, the relative length of active edge of each overburden bench is determined by the mathematical formula. Blasting of volumes of overburden rocks ready for extraction of the bench is carried out from the calculation for the entire blasted amount can not be completely placed on the working platform of this bench and on the minimal working platform of the underlying bench adjacent to it, opening the working benches is carried out by steep sliding ramps with longitudinal slope to 12-15° with the condition of use of vehicles that can overcome such slope, and the width providing location of collapse of blasted rock mass during their expansion and simultaneously through pass of process of technology vehicles, the expansion of steep ramps is carried out using track and wheel loaders by dividing the collapse of the blasted rock mass to the horizontal and inclined layers with height determined by taking into account the path of movement of the loader bucket.

EFFECT: reduction of current stripping ratio in the initial period of development of the deposit.

2 dwg

FIELD: mining.

SUBSTANCE: method comprises the identification of operational field, mineral objects of extraction, inside them - operational blocks with standard, temporarily sub-standard and substandard and sub-standard mineral resources and separation of rocky ones, outstripping, current and realtime automated obtaining of express information, digging of uncovering "wells" or short trenches. The roboting automated extraction of a mineral from formations during their extraction using a mechanical method of separation of minerals and rocks of thin rocky interlayers, automated lifting of a mineral to the daylight area or its bypass to the receiving device arranged in an adit. At excavation of fields of upland type, a rock mass is left in a goaf after excavation of interlayers, the face area is temporarily kept using the automated and roboting ready-made fastening.

EFFECT: improvement of performance of development of non-rocky sheet deposits with medium and steep pitch.

1 dwg

FIELD: mining.

SUBSTANCE: method includes the automated and real-time obtaining and processing of the express information on the structure of array of consistently worked-out parts of ledges, their differentiated separation on the basis of the obtained complex system information into multi-scale structural elements of rocks with natural and technogenic fracturing. Separation of the obtained complex system information into multi-scale structural elements of rocks includes strength, elasto-rheological, thermophysical, structural and mechanical characteristics. The automated combined destruction down of structural members comprises the blasting under a mobile engine driven shelter and subsequent disintegration using an electrophysical method in view of the obtained characteristics. Direct accommodation in temporary storage stockpiles and delivery of the obtained products to consumers is performed after the automated feeding of mined rock into a receiving device of the mobile sorting unit with the subsequent separation of mined rock into respective fractions by coarseness.

EFFECT: improvement of performance of development of fields of building rocks of rocky and semi-rocky types.

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used in development of large deposits of commercial minerals of hollow and tilting occurrence with use of the technique of continuous action with the open-pit mining. The method comprises permanent and initial trenching, mounting of transportation lines, excavation of commercial minerals by mining with wedged stopes. The mining with wedged stopes is carried out from the maximum width of excavation stope to the stope width BTi, which enables movement of transportation lines to the next wedged stope in accordance with the condition: BTi=(BMAXetg[(i+1)a])tg(ia), where BMAX is the maximum width of the excavation stope; e is the distance from the forehead to the transportation lines; a is the angle of rotation of the front of mining operations; i is the serial number of the wedged stope. The subsequent wedged stopes are mined also from the maximum width of the excavation stope, while capturing the unmined part of the previous stope.

EFFECT: increase in productivity of excavation and loading complex in mining of deposits of commercial minerals by fan-mining method.

3 dwg

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used mainly for loading the rock mass in the dump trucks in the implementation of continuous operation of miners. The method comprises implementation of independent processes of positioning hoppers, which occurs simultaneously with the working process of the miner in the automation of the process of orientation of the complex for loading relative to the miner, and the dump truck - relative to the complex. Implementation of independent processes of location of the hoppers is carried out by moving the frames of the hoppers in a vertical plane and the hopper carriages - in the horizontal plane and is controlled by the vertical movement mechanism and horizontal movement mechanism. At that the hoppers by means of articulated linkages with carriages are pivotable in a vertical plane by means of telescopic mechanisms of rotation. The hopper frames when moving interact by sliding bearings with vertical guides. The complex is equipped with vertical guides of the frame of the modules, which interact with the sliding bearings of the frames of the hoppers, the mechanisms of vertical movement connected with sliding bearings, the mechanisms of horizontal movement, mounted on the frames of the hoppers and connected to the hopper carriages for positioning the hoppers in the horizontal plane, and telescopic mechanisms of rotation of the hoppers in a vertical plane relative to the hinge connections, the system of automatic control of mechanisms of the complex functioning. The complex also is equipped with positioning sensors mounted on the frame of the complex and connected to the automatic control system, and to control loading the hoppers with rock mass on the bottoms of the hoppers the control sensors are placed. At that the automatic control system comprises a microprocessor with a control unit, a control panel of hydraulic system and electric generator.

EFFECT: improvement of the process efficiency of the complex operation for loading of the rock mass in the dump trucks.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method in which the quarry along the length is divided by the lines, of which the first is worked out to a target depth with an external spoil disposal and working out of the subsequent ones is carried out using an internal spoil disposal, placing the overburden in the mined-out space of the adjacent line with the common formation of the dump tiers with the development of mining work. And simultaneously with the start of mining operations in the quarry of the first stage within the quarry of the second stage along the deposits the front quarry is built with angles of the slopes of sides close to the angles of reclamation, the cross-overs are located in it for providing cargo communication of the upper working horizons of the quarry of the first stage with the surface, with the reduction of mining operations in the quarry of the first stage on its longitudinal side the loop cross-overs are made adjacent to the bottom of the quarry in the area of the end side, which is formed with a slope towards the temporary side, marking the limit of the quarries of first and second stage, when achievement in the mining operations in the quarry of the first stage of the current depth. The separation of the sides of the front quarry is carried out, turning them into working, and after complete working out the reserves of the quarry of the first stage the working out the reserves of the quarry of the second stage is carried out, while linking its main openings to the main openings of quarry of the first stage in the locations of the loops, the inner dump in the worked-out area of quarry of the first stage is formed as inclined and horizontal tiers, at first directly with the surface from the side not occupied with main openings, the inclined tier is made with bulldozers with width of the platform on top equal to zero, and then using a draglines it is extended by the amount of boom extension, after this the horizontal tiers are dumped in series from the bottom up from the loop cross-overs with the high ensuring their sustainability, to complete formation of the inner dump.

EFFECT: decrease in the distance of inner transportation of overburden from the working area to the inner dump.

8 dwg

FIELD: mining.

SUBSTANCE: method comprises formation of the working area, technology of mining overburden benches and providing cargo communication of the working horizons to the surface, the overburden benches of the working area are taken of the increased height (25-30 m), based on the condition of their mining using excavators with extended working equipment, the benches are combined into groups of three in each. At that for the upper and lower benches in the groups the minimum working areas are provided with dimensions equal to the width of the transport platforms, providing two-way traffic of technology vehicles and its manoeuvring, for the middle benches the width of the platforms is taken equal to the sum of the width of minimum working area and the width of the recess stope with ready-to-dig volumes of overburden, providing the necessary speed of reduction of mining operations in each group of overburden benches of the working area during the formation of the breakdown of the blasted rock mass based on conditions of placing it on the middle and lower benches. And the breakdown of the rock remaining on the middle benches, is divided into two layers, the upper of which are worked out with excavators with top loading into vehicles that are on the platforms of upper benches, the volumes of the lower layers and volumes of the overburden dumped with explosion on the lower benches are worked out with individual excavators with loading to vehicles at the same level with them. After working out the ready for excavation volumes of overburden in all groups of benches and formation of the corresponding volumes on the adjacent underlying benches and displacement of the boundary of the groups occurring at that down by one bench, their working out is repeated in the above procedure, opening the overburden benches of the working area of is carried out using steep sliding cross-overs with the longitudinal slope of 12-15° and width, providing placement of the breakdown of the blasted rock mass during their extension and at the same time the through passage of the technological transport, the extension of steep cross-overs is carried out using track and wheel loaders by dividing the breakdown of the blasted rock mass to the horizontal and inclined layers with the height defined taking into account the trajectory of motion of the loader bucket.

EFFECT: reduction of current stripping ratio in the initial period of working out of the field.

3 dwg

FIELD: mining.

SUBSTANCE: control method comprises control of the intensity of the high temperature thermodynamic laser irradiation to the area of the laser radiation, regulation of change of the wavefront of the laser radiation, control of milling cutting force P, the parameters of the rock material rigidity f through the registration sensor of the rock material rigidity, mounted on the frame of fibre optic laser emitter, the speed control of movement of the surface miner Vki, introduction to program of algorithm of calculation of the wavefront of laser radiation power W, depending on the parameters of rock material rigidity f and the approach increment of fibre optic emitters li based on the equation.

EFFECT: invention enables to improve the efficiency of management of technological preparation for excavation of rock material and provides remote control of destruction of rock material.

2 cl, 10 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.

10 dwg

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.

2 dwg

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

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