Surface mineral mining method and device

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

 

The invention relates to the mining industry and can be used in the opencast mining of mineral deposits in the form of inclined and steeply dipping ore bodies, mining the overburden and ore in deep pits.

There is a method of mining by means of combined transport with the inclusion of cyclic-flow technology [1].

The disadvantage of this method is that it is necessary to apply slope excavations with a small angle, which increases the complexity of works and the cost of transportation of rock and ore to the surface.

There is a method of mining involving the use of cyclic-flow technology in career for transport of ore and overburden [2].

The disadvantage of this method is that when using stationary and prestationary crushing and handling sites dramatically reduces the efficiency of the ore reserves at the corners of the conveyor lines 15-16°that quickly leads to an increase in shoulder transportation of ore and overburden depth testing.

Closest to the proposed to the technical essence and the achieved result is the method of development, involving the deepening of mining operations for issuing ore inclined conveyor is m with elevation angle of 30-35° [3].

The disadvantage of this method is that the use of conveyors with this angle does not solve the problem of cost minimization for the grant of ore and overburden from the quarry to ranocchiocciola Board with changing slope from the top to the deep horizons.

The aim of the present invention is to improve the efficiency, reducing the cost of shipping ore and overburden from the deep pit by means of the continuous transport with varying steepness, respectively, stable Board career

This objective is achieved in that in the known method open pit mining of mineral deposits, including the selection of stages and substages, construction of a deep pit with steep slope in hanging and lying sides deposits are changing the steepness of the slopes of the plots of the Board until the vertical last stage of the work, upon career development space, the initially at the upper levels choose sites and build in the trenches of the first track of the continuous transport in the form of a conveyor lifts, and then when moving to the mountain of the next stages in medium and deep horizons of the upper conveyor lifts transferred to a new area Board the next stage and build a conveyor system in the trench at medium horizons, and when the work is at deeper horizons conveyor lifts mounted on a reinforced resins, anchors and mesh vertical slope side, so that the curvature created by the sustainable sites side corresponds to the road surface and the continuous transport of ore and overburden from the lower horizons at the top, with increasing shear loads in the transported material with increasing steepness of the slope into account in the design of conveyors regulation traction systems and clamping devices, tape mechanism, as well as the developed device that includes a carrier conveyor belt and backing tape, characterized in that depending on the elevation angle of the thickness of the material on the carrier tape is divided into compartments and provide clamping devices in the form of bearing and pressure rollers rigidly connected with the carrier design, and the distance between the bearing rollers choose from 2-3 m at angles of 15-20° up to 0.8-1 m at an angle of rise of the 90°and spillage of material on the edges of the tapes is excluded due to the pressing belts, pinch rollers, and a device rubber heel to pour on the pressure, not allowing the material in the zone of contact between the carrier and clamping bands.

Figure 1 shows the section along the steeply inclined ore body and the input sequence inclined steeply inclined and vertical lifts of ore and overburden.

2, 3 - redistribution of pressure shear (mixing) pieces m the material with increasing angle element lift (cover) and change its size depending on the angle of the lift α .

On 4-10 - the proposed device conveyor lift, its components and the scheme of redistribution of shear stress with increasing angle of lift and the choice of the distance b between the clamping rollers 9.

Figure 10. The change of the distance between the bearing and clamping rollers in the item of lift (compartment) depending on the magnitude of the pressure load shift.

In the drawings, the positions indicated: 1 ore body; 2-4 - inclined, steeply inclined and vertical conveyor lifts; 5 - trench in the side of the quarry; 6 - conveyor belt; 7 - rock (ore); 8, 9 - bearing and pressure rollers; 10 - supporting structure; 11 - rubber heel to prevent leakage of material; 12 - fastening slope; 13 - Board of a career on the project.

An example of executing

The method of mining ore and overburden deep quarry in the allocation of development stages and the detuning of the boards in stages with different angles of slope areas of the Board until the vertical last stage of development with fastening slope in deep areas and building on the inclined sides, steeply inclined and vertical lifts with Overdrive rock (ore) or a single rod is illustrated by diagrams, placed on 1-10, and is carried out as follows. In deep pits of the mine "Railway" JSC "Kovdor GOK" and Coachinc.com open pit mine "Vostochny" JSC "APAT the t", developing 1 and a steeply inclined ore body at offset inclined steeply inclined and vertical sections of the appropriate Board structure inclined 2, 3 and a steeply vertical conveyor 4 lifts. The use of conveyor lifts, built on parts of the sides of the trench 5 with increasing depth of resistant breeds due to the decreasing depth of their fracture and less anthropogenic disturbance arrays explosive loads, and dramatically reduces the volumetric dimensions of the career space, because the amount of overburden to be hollow, and the transportation for conventions, we build posted in the pit, is reduced to 1.5-2 times.

The advantage of the steep slope of pits corresponding to the natural strength and stability of the arrays, when the offset convex sides with increasing steepness in deep zones can be implemented using the developed design of conveyor lift.

Conveyor lift is constructed, consisting of two conveyor systems 6, one of which - carrier (transporterman material 7), and the other plays the role of the retainer. To ensure finding material 7 on the conveyor and its transportation without displacement thickness of the material on the tape is divided into compartments in length depending on the magnitude of the shear load, and pressed bearing rollers 8, and to compress the strips to each other at their ends are pinch rollers 9. As bearing and the pressure rollers are rigidly connected with the bearing structure 10. To avoid spillage of material on anti-squeak tape before pressing clamping rollers make thickening (heel) 11. The distance between the supporting rollers 8 is adjusted when changing the angle of lift of 2-3 m at an angle of rise 15-20° up to 0.8-1 m at an angle α=90°. In the construction of conveyor lifts on steeply inclined and vertical portions of the pitwall need strengthening them 12. The use of the device in deep pits allows you to create a seamless delivery system of material on the surface of the curving conveyors from the plot with vertical slopes up steeply inclined and inclined near the surface of the career without overload while providing the necessary traction force.

The use of conveyor lifts on slopes steeply inclined and vertical portions of the pitwall reduces by 1.5-2 times the current, and operating ratio, to increase the depth career at 100-150 m, compared with 13 and by reducing the cost of excavation and moving of rocks and ores on the surface can be obtained the effect in the amount of one billion rubles.

Sources of information

1. Usynin VI, R is Chetak S. p. Open development of iron ore deposits of the North. Apatity. Ed. Kola science centre - 1987. - 118 S.

2. Cyclic-flow technology for ore and overburden at the quarry Kovdorsky GOK / usynin VI, Reshetnyak S. p., Radionov S.N. etc. // Sat. Cyclic-flow technology at the quarries of the Arctic. Apatity. Ed. Kola science centre. - 1986. - S. 12-27.

3. Kabirov, A.R., Technological solutions for the development of the CCM with the elimination of temporary pillar in Muruntau quarry. - Horn.-information.-anality. No. 4. - 2005. - 262 to 264 C. (prototype).

1. The method of open pit mining of mineral deposits, including the selection of stages and substages, construction of a deep pit with steep slope in hanging and lying sides deposits are changing the steepness of the slopes of the plots of the Board until the vertical last stage, characterized in that as the career development space, the initially at the upper levels choose sites and build in the trenches of the first track of the continuous transport in the form of a conveyor lifts, and then when moving to the mountain of the next stages in medium and deep horizons of the upper conveyor lifts transferred to a new area Board the next stage and build a conveyor system in the trench at medium horizons and nalubola horizons conveyor lifts mounted on a reinforced resins, anchors and mesh vertical slope side so that the curvature created by the sustainable sites side corresponds to the road surface and the continuous transport of ore and overburden from the lower horizons at the top, with increasing shear loads in the transported material with increasing steepness of the slope into account in the design of conveyors regulation traction system and clamping the tape mechanism.

2. The device includes a carrier conveyor belt and backing tape, characterized in that depending on the elevation angle of the thickness of the material on the carrier tape is divided into compartments and provide clamping devices in the form of bearing and pressure rollers rigidly connected with the bearing structure, and the distance between the bearing rollers choose from 2-3 m at angles of 15-20° up to 0.8-1 m at an angle of rise of the 90°and spillage of material on the edges of the tapes is excluded due to the pressing belts, pinch rollers, and a device rubber feet for anti-squeak tape, not allow the material in the zone of contact between the carrier and clamping bands.



 

Same patents:

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, particularly opencast mineral mining.

SUBSTANCE: method involves stepping rock up to design outline with leading in the first stage pit edge; transporting ore along main decline to plant and stacking overburden in dump; excavating connection entry between the first stage pit and the second stage pit so that the entry is opened in previously excavated the first stage pit; cutting the second stage pit; transporting ore and overburden from the second order pit via connection entry; depositing overburden from the second order pit in the first stage pit goaf after termination of the first stage pit excavation. Before ore and overburden transportation from second order pit via connection entry overburden excavated from the second order pit is accumulated in outer dump. Overburden from the second order pit is conveyed to day surface along temporary decline system. When the second pit side reaches designed outermost outline temporary declines are killed.

EFFECT: reduced costs of deposit development and decreased hazardous action of mining operations on environment.

4 cl, 4 dwg, 2 tbl, 2 ex

FIELD: mining industry, possible use during extraction of coal, ore and non-ore deposits by open method.

SUBSTANCE: in accordance to method, geological structure of massif is analyzed, position of potential sliding surface is detected, physical and mechanical properties of rocks are determined. Along profile parallel to edge of shelf in its middle portion, frequency of alternation of impulses of natural electromagnetic radiation is measured. On intervals where this frequency exceeds level of background radiation more than 2 times, interval-wise measurement of relation of strength level of signal electric field at two working frequencies is performed. By means of computed logarithmic dependence, depth of location of potential sliding surface is determined. With consideration of change of this depth, structure of massif, technological parameters and physical-mechanical properties of rocks, values of stability reserve coefficients are calculated on basis of ratio of momentums of holding and moving forces within limits of detected dangerous portion. Probability of landslide development is evaluated on basis of minimal values of stability reserve coefficients.

EFFECT: increased precision when predicting stability of quarry sides.

2 cl, 1 ex, 1 tbl, 4 dwg

FIELD: mining industry, possible use in deep quarries extracted with utilization of motor and conveyor transport.

SUBSTANCE: method includes transportation of rock mass from excavation faces by dump trucks and loading it through mobile crusher plant, mounted at temporarily shut down section of quarry, and transit ribbon conveyor, located in the mine on end side of quarry, onto ribbon conveyor lift, positioned in mines on end side of quarry. After update of quarry with positioning of mobile crusher plant at temporarily shut down section of quarry side, transit conveyor is disassembled, crusher block from mobile crusher plant is moved and mounted above end section of conveyor lift, in semi-trench driven preliminarily to subjacent safety bench a bunker is assembled with plate feeder for loading crusher block, while block of rocks formed below previous locations of mobile crusher plant and dump truck unload points is extracted with transportation and loading of exploded rock mass from dump trucks and rotary platform of main ramp through bunker with feeder and through crusher block from mobile crusher plant.

EFFECT: no need for moving crusher plant and for additional motor transport unit between crusher plant and conveyor lift.

2 dwg

The invention relates to hoisting and transport machinery, namely, conveyors for vertical and steeply inclined transportation of bulk materials

The invention relates to hoisting and transport machinery, namely, conveyors for vertical and steeply inclined transportation of bulk materials

The invention relates to the mining industry for the transportation of rock mass in mining operations open pit and underground

The invention relates to hoisting and transport machinery, namely, conveyors for vertical and steeply inclined transportation of bulk materials

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.

SUBSTANCE: invention refers to mining and can be implemented at open excavating of mineral deposits in form of edge and inclined ore bodies of high and low thickness and also in form of veins. The method consists in dividing overburden and ore body into zones along vertical. Inclined, steeply inclined and vertical sections of borders are made in zones and are secured in deep zones at pit completion; as excavating of mineral advances in the first zone, in place of termination of rational implementation of vehicle, a conveyor installation is assembled on border of the pit in form of bearing and clamping bands with variable steepness of incline corresponding to equistable angle of border incline; frictional drums of the conveyor installations and a pulling body of a hoist engine are used as pulling members; the hoist engine is installed on the surface, which facilitates adding steep inclined and vertical blocks of the conveyor installation as excavation of mineral in the second, third and successive zones advances. For this purpose platforms are made in side zones of the pit, whereon crushers are installed and a receiving section of the conveyor stand is mounted; periodically they are displaced when excavation of the next stage commences and steepness of the stand is increased. Also, to facilitate adequate uniform maintaining load of lumps of ore (rock) on an apron at the height of the stand stoppers are arranged on a rubberised band; the stoppers are made in form of elevations out of the same material and of a strip shape, expanding at the base to suppress shearing load of lumps.

EFFECT: increased efficiency of operation at transporting and delivery of excavated mass to surface.

1 ex, 12 dwg

FIELD: mechanics.

SUBSTANCE: inclined belt conveyor consists of the main and additional belt. Lower flight (9) of the additional belt has longitudinal near-zero tension. Movement of upper flight of the additional belt along the supporting devices is provided at non-negative resistance of its movement. Drive drum of the additional belt is located in the conveyor lower part immediately after loading device (11) in the direction of movement of load-carrying flight of the main belt, under it there located on parallel axis (16) and kinematically connected thereto is cylindrical roller (17) installed with the possibility of being held down to the flight of the additional belt, which runs off the drum, and fixed in this position. Kinematic connection is made in the form of drum shells fixed on side edges and roller of rings that are frictionally interrelated to each other. Mechanism of holding the roller down to the drum is made in the form of two screw pairs (20) installed with the possibility of shifting housings of bearings (23) of roller relative to a fixed vertical post whereon there fixed are bearings of drive drum of the additional belt. Hold-down devices are made in the form of loops (25) made from round-link chains and suspended to frame (24). Distance between suspension points of each loop to the frame is more than width of the additional belt.

EFFECT: simplifying the conveyor design, improving life time of the main and additional belts, reducing consumption of energy required for transportation, and improving conveyor operating reliability.

5 cl, 5 dwg

FIELD: mechanics.

SUBSTANCE: inclined belt conveyor consists of the main and additional belt. Lower flight (9) of the additional belt has longitudinal near-zero tension. Movement of upper flight of the additional belt along the supporting devices is provided at non-negative resistance of its movement. Drive drum of the additional belt is located in the conveyor lower part immediately after loading device (11) in the direction of movement of load-carrying flight of the main belt, under it there located on parallel axis (16) and kinematically connected thereto is cylindrical roller (17) installed with the possibility of being held down to the flight of the additional belt, which runs off the drum, and fixed in this position. Kinematic connection is made in the form of drum shells fixed on side edges and roller of rings that are frictionally interrelated to each other. Mechanism of holding the roller down to the drum is made in the form of two screw pairs (20) installed with the possibility of shifting the housings of bearings (23) of roller relative to a fixed vertical post whereon there fixed are bearings of drive drum of the additional belt.

EFFECT: simplifying the conveyor design, improving life time of the main and additional belts, reducing consumption of energy required for transportation, and improving conveyor operating reliability.

5 cl, 4 dwg

FIELD: transportation.

SUBSTANCE: belt conveyor comprises main and additional belts. On external surface of additional belt there are transverse accessories fixed in the form of doubled thrusts installed with clearances with gap relative to each other with the possibility of their interaction with transported cargo placed on weight-bearing strand of the main belt. Drive of additional belt is arranged in the form of cone belt gear that connects head drum of additional belt and declining drum installed near driving drum of conveyor belt. In zone of conveyor belt non-working strand lapping from mentioned declining drum, reverse drum is installed inside circuit of conveyor belt.

EFFECT: simplified design of conveyor, reduced metal intensity and energy intensity of loose cargo transportation, increased reliability of conveyor operation at angle of conveyor inclination up to 30-35 degrees.

5 cl, 5 dwg

FIELD: transportation.

SUBSTANCE: belt conveyor comprises the main and additional belts. On external surface of additional belt there are cross planks fixed. Pins are welded to planks with the possibility of their interaction with transported cargo placed on weight-bearing strand of conveyor belt. Drive of additional belt is arranged in the form of cone belt gear that connects head drum of additional belt and declining drum installed near driving drum of conveyor belt. In zone of conveyor belt non-working strand lapping from mentioned declining drum, reverse drum is installed inside circuit of conveyor belt.

EFFECT: simplified design of conveyor, reduced metal intensity and energy intensity of loose cargo transportation, increased reliability of conveyor operation at angle of conveyor inclination up to 30-35 degrees.

5 cl, 6 dwg

FIELD: mining.

SUBSTANCE: procedure consists in establishing stages and sub-stages, in constructing deep pit under differentiated angles of border slopes in accordance with deteriorating natural and anthropogenic dislocation of massif rock with depth and in implementation of traditional transport. Overburden thickness of rock and ore body is divided along vertical into zones. In the zones there are constructed sloped, steeped and vertical sections of borders which are timbered in deep zones at open pit completion. Development of pay thickness of rock is begun with preparation and with running trenches for conveyor lines increasing their incline in deep zones. Also conveyor systems are applied in form of tubular ones divided into sections with retaining stops against weight of lumps and with cloth enveloping the said sections. Notably, on one side this cloth is equipped with fasteners of rectangular shape, while on the other side it is equipped with hooks entering the fasteners (loops), as a tubular shape of cloth is formed by means of a frame with rollers at initial, steep and vertical sections of the route. When the conveyor emerges to surface, hooks are disengaged by means of a facility in form of an inclined capstan coupled with the frame of the conveyor, pressing cloth with hooks down and disengaging the hooks. Further, rock (ore) is unloaded in a common mode of a running-off belt of the conveyor. Temporary (intermediate), regular and additional dumps are made on deposit sides in its hanging layer to provide optimal transport communication between stripping faces and places of storage of rock capping. Rock is transported along descents directed to contours of the pit of the II and III orders of development, first with transport facilities of cyclic operation (motor transport), and further with continuous transport. Also trenches with conveyors are directed to elongate conveyor elevators or to create a cascade system, when ore body thickness or angle of its pitch changes. When facilities of cyclic operation (motor transport) reach an ultimate run of transporting and the system does not function optimally, the conveyor elevators are immediately constructed in the zone of ore development. The route for conveyor elevators is laid to facilitate their elongation or operation in complex with the vertical elevators transporting ore to surface to a reloading point. Additionally, the last elevator in deep zones is constructed in such way, as to ensure run of transporting of assembled transport within limits of optimal functioning of the system. At a final stage of pit operation project angles of borders are corrected; the last layers (III stage of development) are worked out and borders are corrected to ultimate, differentiated by stability, final angles in a deep and super-deep pit.

EFFECT: raised efficiency of operations for excavation of capping and ore, reduced current coefficients of capping, reduced volume of capping in borders at their sloping under stable steep angles and construction of object for economic and military needs.

1 ex, 15 dwg

Up!