Method for slanting of high benches on outline of open pit

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

 

The invention relates to the mining industry and can be used in surface mining when satkoski high ledges at the limit of the pit.

A known method of processing selection area career, including simultaneous testing selection belt with blasting wells contour number (A.S. USSR №102881 E 21 21/00) [1]. This order of execution of works leads to disruption zakomornogo array, especially in the upper part in the region of the detuning of the berms (education violated the “visor”). In a further prolonged period of operation this section, where filled berm will be intensively destroyed, and the berm “to work together”.

A known method of processing selection area career, including a first blasting wells contour line on all height, and then testing selection tape 2-3 layers of drilling and blasting work wells with a diameter of 250 mm and the final shipment of the breed (A.S. NO. 20178079 E 21 41/26) [2].

This method also has disadvantages, as discussed above, because bermula the horizon by perebor working wells destroyed the top layer to a depth of 20 diameters of charge (up to 4-5 m). Especially significant violation of the array in the area of berkovoi site horizon due to the emergence of a steep and inclined slabbing cracks. Partially violated the first ledge at long term standing under the influence of precipitation and weathering will crumble quickly especially in the field “peak” of the slope.

There is a method of testing selection of tapes and satkoski ledges, providing formation within the designed pit contour cutting slit and the subsequent sodoku the ledge blasting charges in shortened wells, with a gradual decrease in their length in the direction of the slope of the lower burkavage horizon. The result is a sloping berm [3]. The specified order of execution of works will lead to the fact that the rebuilt surface of the berm will not match the project settings, and breach the surface of the array at a depth of blast holes will be 10-20 diameters of charge, and “visor” bottom bench will be broken with the formation of slabbing cracks. In the long term standing of the ledge under the influence of precipitation, seismic actions massive explosions in the career and weathering of rocks “visor” ledge will collapse, reducing the width of the safety berm.

Closest to the proposed to the technical essence and the achieved result is a method of processing selection area and satkoski ledges, comprising a slit for limiting the pit, and drilling and blasting charges in the fender wells, the result after cleaning the rocks there is a high ledge [4]. The specified order of execution of works leads to disruption of C is the contour array on bermula the horizon on the site of a “visor” bottom high ledge in the explosion of the charges in the fender wells, which is drilled with a significant pereboom. Weakened by cracks “visor” high ledge gradually destroyed by the action of weathering and water (freezing - thawing of rocks) and poses a threat to working on cleaning berms from mounds and stones, as well as to work on the underlying horizons.

The aim of the present invention is to improve the stability of high ledges by reducing the formation of cracks and irregularities in the visor of the ledge burkavage horizon.

This objective is achieved in that in the known method of satkoski ledges, including contour drilling wells for education shielding slit, buffer and fender wells to a depth corresponding to the height of one working pedostop with pereboom, the average number of fender wells perform with nezabarom, the loading wells and blasting, loading rocks and after blasting first contour wells for the formation of cracks and buffer wells, and then fender wells and cleaning breed similar operations are performed on the underlying pedoscope lower high ledge, the refinement of the upper and lower ledges are doubling work podustov, when practicing the bottom pedostop top of a high ledge contour wells are drilled to the full height stuivenga ledge, buffer wells are drilled on rasstojanii-13 diameters of charge from the contour of the wells and the depth at least corresponding to the height of the working pedostop with pereboom 6-8 diameters of charge from burkavage horizon, then drilling the number of fender wells on the distance 16-17 diameters of charge from the buffer to the wells, and the first and last rows with pereboom 4-5 diameters of charge, and the average number of wells are drilling near the bottom stuivenga slope away 4-5 diameters of charge with nezabarom 7-8 diameters of charge.

After loading and blasting holes in the beginning of the buffer, then the bumper cleaned breed to the height of the array of the ridge, and the area of the berm after harvest breed is drilling a small diameter and depth for the formation of the necessary parameters of the slope of the shaft of the rock (natural shaft): width, height, on top of the B1, bottom B2, angles of repose of the shaft α1- high ledge and α2from the side of the berm, the roadway berm width 25-30 diameters of charge. Then proceed to the contour drilling wells at full height swayweih of podustov from the platform formed by the ridge. At a distance from the contour of a number of wells 12-13 diameters charge of drilling the number of buffer wells at the height of the upper working pedostop lower high ledge with pereboom 4-5 diameters of charge. The first and subsequent series fender wells after harvest breed from the previous explosion of the Buryats in the distance 16-17 diameters of charge from the buffer wells with pereboom 7-8 diameters of charge.

Contour wells corresponding to the height of the lower ledge, charge charges, providing education in a given portion of the shielding slit. For its formation are the charges of the annular gap and the density of charge 3.0 kg/running meters

After loading and blasting contour of a number of wells, then the buffer wells carry out blasting fender wells. At the end of harvest breed continue operations to simulate the lower selection tape stuivenga ledge. The result is a slope with minimal disruption as the slope and the top of the “visor”protected shaft from the natural rocks of the minimum width and greater height.

To improve the stability of a slope in the upper part and lower its sipani in fractured rocks, you can place it in the form of monolith, which after drilling the contour of a number of wells perform propyl between them by means of special mechanisms (saws) at the height of the cutting tool.

How satkoski high ledges on the career path is illustrated by the circuits shown in Fig.1-3. Figure 1 - General view 2 - development of the lower working pedostop top 30-foot ledge with the formation of the natural shaft-monolith (protection “shield”); figure 3 - scheme of education shaft (monolith) in fractured rocks with propylene p is miucca between contour wells.

1 - upper slope dual ledge; 2 - lower slope dual bench; 3 - berm; 4, 5, 6, 7 15 - metre working pedoscope; 8 - slot; 9 - buffer wells; 10 - fender wells; 11 - wells of small diameter; 12 - the slope of the shaft; 13 - propyl between contour wells.

An example of executing

The method is as follows. At the limit of the pit must be offset the lower part of the upper dual ledge 1 height 30 m and the lower double bench 2 height of 30 m with a berm between a width of 10 meters, the Formation of 30-foot ledges is made by doubling a 15-metre working podustov 4, 5, 6, 7. At the approach of mining operations to the upper working podstupy will create a gap 8 to the full height stuivenga ledge, then Buryats buffer 9 and fender wells 10. After loading, blasting at the beginning of the buffer wells explode fender wells. After cleaning the rocks start testing lower pedostop top 30-meter cliff. In the selection area of rebuilt bench 1 at a distance equal to 12 times the diameter of the charge (with charge diameter 0.25 m this distance will be 3.0 m) being the number of the buffer wells 9 to the height of the lower working pedostop top 30-foot ledge with the following parameters: diameter wells 250 mm, drilling depth with pereboom wells - 17 m, the distance between the wells in row - m

The depth of the fender wells 10 AC: the first series fender wells 10 from the buffer wells 9 and the last row fender wells 10 in the lower selection tape top 30-meter ledge 1 are drilling to a depth of 16 m, and the average number of pneumatic drill 10 wells are drilling to a depth of 13-13 .5 m to protect the array on the lower slope 30-meter ledge 2 from damage during the explosion fender wells 10. After blasting the buffer wells 9 explode fender wells 10. In the above slope 2 bottom 30-meter ledge formed array (crest) height of 1.5-1.8 m Then starts cleaning the rocks at the height of the ridge, and the area of the berm cleaning accompanied by drilling shallow wells 11 of small diameter for the formation of a slope 12. From the slope from the crest of drilling the number of contour 8 wells on slope 2 in its extreme position to the full height of the 30-meter ledge plus the height of the ridge (1.5-2 m) - 31,5-32 m

Thus, maintained for the required design parameters of the protective shaft: height 1.5-1.8 m, width of the shaft on top of the B1=1.4 to 1.5 m below2=2-2,2 m, angle of slope from the roadway berm α2=60-65°, high slope α1=70-75°.

Then Buryats buffer wells 9 to the height of the working pedostop 6 with the height of the ridge and perebor - 18 m, and fender wells 10 to a depth of 17 m, the Distance between the buffer and contour and wells in the range of 3-3 .5 m, between the bumper and the buffer 4 m, between the bumper in the range of 4-5 meters

After loading wells carry out their blasting. Originally form the shielding slit 8 blasting contour wells 8, then blow up the buffer wells 9 and then the bumper 10. Type of charge when the detonations contour wells 8 - annular gap, the charge density of 3.0 kg/POG. m charge Weight 87 kg, the charge in the buffer well with the annular gap, the density in the upper part of the charge 11.0 kg/m, the charge weight 119 kg with an air gap. The distance between the buffer wells - 3 m

For testing working podustov 5, 6 used the following parameters blasting: diameter wells 250 mm, drilling depth 17-17 .5 m, the distance from the row buffer wells - 4 m between rows - 4 M. the weight of the charge in the well 460-480 kg

Blasted rock top working pedostop 6 is removed and then is testing the bottom of the working hearth stupa 7 30-meter ledge 2 similarly, upstream work podstupy 6 by drilling, loading and blasting first buffer, and then fender wells with application of the model parameters blasting.

Blasted rock bottom working pedostop removed and ends the offset top of the high ledge 1 lower high ledge 2 and berm 3 with monolithic shaft 12.

In fractured rocks at the POPs is assured a shaft-monolith and reduce the destruction of its slope implement propyl 13 between contour 8 wells on the height of the cutting tool (2-3 m).

The application of the proposed sequence and parameters of the detuning high ledges provides complete safety zakomornogo array, especially in the upper part of the scarp, and for the first time on the site berms create a protective shaft, which protects “visor” from the influence of atmospheric precipitation, weathering. The formation of stable shaft not only allows you to secure the maintenance cleaning of the berm, but also protects from flight pieces on the underlying horizons.

Sources of information

1. AS the USSR # 102886, E 21 41/00. The method of processing selection area of the quarry.

2. A.S. Russia No. 2178079, E 21 41/26. How satkoski high ledges at the limit of the pit.

3. Galustian AL improving the design outside of the pitwall // horn. journal No. 1-2. 1998, Pp.92-96.

4. RF patent №2004805, CL E 21 41/26, 1993 (prototype).

1. How satkoski high ledges on ultimate career path, including contour drilling wells for education shielding slit, buffer and fender wells to a depth corresponding to the height of one working pedostop with pereboom, the average number of fender wells perform with nezabarom, the loading wells and blasting, loading rocks, and after blasting first contour wells for the formation of cracks and buffer wells, and then fender wells and UB the RCTs breed, similar operations are performed on the underlying pedoscope lower high ledge, wherein the testing of the upper and lower high ledges are doubling work podustov, when testing lower pedostop top of a high ledge contour wells are drilled to the full height stuivenga ledge, buffer wells are drilled at a distance of 12-13 diameters of charge from the contour of the wells and the depth at least corresponding to the height of one working pedostop with pereboom, 6-8 equal to the diameters of the charge, the first and last numbers fender wells are drilling with pereboom equal to 4-5 times the diameter of the charge, and adobor middle row fender wells is 7-8 diameters of charge, after blasting the buffer and fender wells and cleaning rock ridge is formed from the surface of which side of the slope Buryats contour and buffer wells, with the first height swayweih of podustov, and the second to a height of at least one lower working pedostop, then fender well at the same height as in higher - and lower podstupah, and for the formation of a natural protective shaft on the upper area of the lower high ledge on the site berm formed the crest eliminated by drilling, loading and blasting holes of small diameter and depth.

2. The method according to p. 1, characterized in that the ri the formation of a protective shaft-monolith and increase its resistance to perform propyl between contour wells at the height of the cutting tool.



 

Same patents:

FIELD: mining industry, applicable in opencast mining of mineral resources and hydraulic engineering.

SUBSTANCE: the method for formation of a deep-hole charge of a multi-component mixed explosive consists in impregnation of porous and crystal ammonium nitrate with liquid petroleum product and placement of the obtained explosive in the hole, formation of the mentioned deep-hole charge in its extension is accomplished with sections of various density of the explosive depending the physico-mechanical properties of the rocks located in the length of the hole, varying the density of the explosive by varying the mass percent relation of the quantity of granules of porous and crystal ammonium nitrate in the explosive compound, the mass percent of a granule of porous ammonium nitrate is within 54.5 to 71.5, a granule of crystal ammonium nitrate is within 20 to 40, liquid petroleum product - within 5.5 to 8.5, the granules of porous ammonium nitrate are used with sizes of 2.5 to 4.5 mm, and those of crystal ammonium nitrate - 0.7 to 1.3 mm, mineral oil is used as petroleum product.

EFFECT: provided optimized destruction of the rock in opencast mining of mineral resources and in building blasting operations.

3 cl

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

The invention relates to the mining industry, in particular to methods of blasting ores and rocks borehole or blast hole charges of EXPLOSIVES in open Geotechnology to reduce output oversized, and can be used in underground Geotechnology

The invention relates to the mining industry, in particular to methods of mass blasting ores and rocks underground, training blocks to the underground leaching, and can be used for open development of mineral deposits

The invention relates to the mining industry and can be used for the open development of mineral resources

The invention relates to mining and can be used to improve the performance of the release of the rock mass of the ore chutes and duchek

The invention relates to the mining industry and can be used in underground mining, ore arrays which are divided into blocks, limited shielding zones dikes and mineralized fissures

The invention relates to the field of mining, in particular to the development of strong rocks in underground conditions

The invention relates to a method of blasting borehole charges of industrial explosives and can be used in the mining industry for the blasting of rocks

The invention relates to mining and can be used in devices for the elimination hangs in the ore chutes

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.

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 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 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 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 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 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

The invention relates to the field of construction and mining and can be used to restore the broken ledges during operation of the quarry

The invention relates to the mining industry and can be used with open placers of

The invention relates to mining, in particular to the development of quarrying, and can be used when developing zakonchennih deposits

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

Up!