Method to reduce dust carryover from man-made massif surface

FIELD: environment protection, particularly to protect nature against dust blown off with wind from man-made massif surfaces.

SUBSTANCE: method involves contouring dust-forming surface and creating protective structures on dust-forming man-made massif surface in two mutually perpendicular directions, namely transversely to and along prevailing wind action directions; determining wind speed Vlim, m/s which provides maximum permissible dust concentration and maximal prevailing wind speed Vmax, m/s at massif sanitary zone boundary; partitioning man-made massif surface into square areas; installing protective barriers along protective barrier perimeters, wherein the protective barriers are formed of cellular material. Each square area has side length Lar determined from mathematical expression.

EFFECT: reduced dust carryover.

2 dwg, 1 ex

 

The invention relates to the environment and can be used to protect the environment from dust, brought by the wind from the surface of technogenic massifs.

Known device for binding dust - Patent RU NO. 2230997, 7 F 24 F 3/16 published 20.06.2004, bull. No. 17, in which for binding dust is applied bioclaudia mixture, which includes the sapropel. Bioclimate mixture is sprayed on areas of dusty surfaces with a pneumatic injector.

The disadvantages of this device should be attributed to the relative complexity of the design of the pneumatic-hydraulic nozzles, spray billelsey mixture; the need to move the installation to handle dust-forming surfaces of large dimensions, such as tailings; the need to have a considerable supply of quantities of sapropel, which is associated with the creation of additional storage space.

Known compiletest screen - Patent RU No. 2209874, IPC 7 E 01 F 8/00, published 10.08.2003, bull. No. 22, which provides protection of the public institutions, residential buildings, monuments from exposure to dust, noise, sound waves of the urban environment, as well as the suppression of these factors. Compiletest screen can be installed at construction sites, industrial facilities and other sources of dust and sound, have a negative impact n the environment. Compiletest screen mounted on the Foundation and consists of a set of acoustic panels installed with the formation of parallelepipeds, the cavity of which is filled with sound-absorbing modules, and having perforations made on the walls of the panels facing the source of sound and dust.

The disadvantage of this technical solution is the complexity of the design screen; high cost of manufacture of the screens and their subsequent installation in large areas.

The known method of combating wind erosion described in the "Ecology of the mining industry", M.: Nedra, 1991, str-221 (ed. Mirzaev GG, Ivanov B.A., Shcherbakov V.M., Proskuryakov NM)adopted for the prototype.

In this way the effect of reducing the dust is achieved by the creation of protective forest belts, which come in two mutually perpendicular directions: across the direction of the prevailing winds, and along this direction, and the distance between the protective forest strips depending on the species planted trees and speed they reach the average height is 350-600 m

The disadvantages of this method are:

1) to reach the maximum efficiency of the method goes a prolonged period because of the slow growth of trees;

2) inability to use this pic is BA to reduce the emission of dust from the surface of the tailings due to the presence of toxic elements;

3) high complexity and cost of creating windbreaks.

The technical result of the invention is to remedy these disadvantages.

The technical result of the method of reducing dust from the surface of man-made array is in delineating dusty surface and creating a protective barrier placed on the dusty surface of anthropogenic array in two mutually perpendicular directions: across the direction of the prevailing winds, and along this direction. According to the invention determine the value of the wind speed Vlim(m/s)by which the boundary of the sanitary zone around the man-made array provides maximum dust concentration and the maximum velocity of the prevailing winds Vmax(m/s), surface anthropogenic array is divided into square areas, perimeters which establishes a protective barrier made of flexible material.

The method is as follows.

The area is calculated dusty area. As a result of instrumental measurements or calculations performed, for example, using the software package series "the Ecologist 2.55" (the Method of calculation of concentrations in atmospheric air of harmful substances in emissions of enterprises. DME-086. Goskomgidromet is so Leningrad: Gidrometeoizdat, 1987), determine the value of the wind speed Vlimby which the boundary of the sanitary zone around the man-made array provides maximum dust concentrationdust=CMAC. In addition, the analysis of long-term data meteorological studies establish the maximum velocity of the prevailing winds Vmax. Protective barriers installed on the dusty surface of anthropogenic array so that in all cases subject to any directions of the wind to reduce wind speed at the dusty surface with Vmaxto Vlim. The wind speed reduction is achieved by creating a so-called wind shadow, the length of which depends on the height of boom Nzag. The higher the Hzagthe for a given value of Vlim/Vmaxmore the length of the wind shadow of the Ltenand therefore at a greater distance from each other can be positioned line protective barrier. Analytical dependence between the length of protective boom Lzagto its height Hzagand the length of the wind shadow of the Ltento Hzagis:

There is a probability that the wind speed can reach values of Vmaxthe AK when possible wind direction, so in the direction perpendicular him. Therefore, a guaranteed reduction in the wind speed near the surface of man-made array in the Vlim/Vmaxtime will be provided only when the length of the wind shadow of the Ltenin two mutually perpendicular directions (in the direction of the prevailing wind and perpendicular thereto direction) will be the same. Thus, the ranks of the protective barrier, installed perpendicular to the prevailing winds and parallel to this direction should be from each other at equal distances LUch. This distance is defined from the formula (1) with Lzag=LUchand Lten=LUch.

where Nzag- the height of the protective barrier (m) is selected from the range of 0.5-3 m, under the condition exceeding the LUchsize 10 m, and a given reduction in wind speed. For example, at lower wind speeds, respectively, at 70; 60; 50; 40% of the height of boom Nzagcan be 1; 1,5; 2; 2,5 m, respectively.

To create this boom all dusty surface anthropogenic array (1) is divided into square sections with side length LUch(2)calculated by formula (2) (figure 1).

The perimeters plots install bearing (3)that secure the screens (4)made of flexible material is. As the flexible material may be used, for example, wire mesh, made from polymer (figure 2).

An example implementation of a method for conditions Olenegorsky GOK. As a result of removal of dust from the surface of the tailings dust concentration at the boundary 500 m buffer zone exceeds the maximum allowable concentration in 2 times. The maximum wind speed, installed according to many years of meteorological measurements is 6 m/s (applied Scientific reference book on the climate of the USSR. Series 3. Long-term data. Parts 1-6 Issue 2. Murmansk oblast, Leningrad: Gidrometeoizdat, 1988). As a result of experimental measurements and numerical evaluations found that to achieve at the border of sanitary zones Withdust=CMAC(5) 1 it is necessary to reduce the wind speed at the surface of the tailings up to 3.5 m/s By the formula (2) length of the plot, the perimeter of which is mounted the fence, the height of which is equal to 2 m, is 15 m Thus, the entire surface of the tailings is divided into square sections with a side length of 15 meters, the total area of dusty surface tailings 30 ha total length of the fence of wire mesh approximately 60 km.

The inventive method allows to reduce the dust from the surface of technogenic massifs (tailings, dumps, and so on) to the value guarantees not exceeding its maximum permissible concentration at the border of sanitary zone, and to improve environmental protection at minimum cost.

The way to reduce dust from the surface of man-made array, which consists in delineating dusty surface and creating a protective barrier placed on the dusty surface of anthropogenic array in two mutually perpendicular directions: across the direction of the prevailing winds, and along this direction, characterized in that determine the value of the wind speed Vlim(m/s)by which the boundary of the sanitary zone around the man-made array provides maximum dust concentration and the maximum velocity of the prevailing winds Vmax(m/s), surface anthropogenic array is divided into square areas, perimeters which establishes a protective barrier made of a flexible mesh material, and the length of a side of each plot LUchcalculated by the formula:

LUch=46,4Hzag(Vlim/Vmax)2,6, m,

where Nzag- the height of the protective barrier, m;

Vlim- the wind speed at which the boundary of the sanitary zone around the man-made array is provided by the limit value for the concentration, m/s;

Vmax- the maximum velocity ascendant the winds, m/S.



 

Same patents:

FIELD: mining, particularly reclamation of surface-mined areas in agriculture and building industry.

SUBSTANCE: method involves selectively mining, moving and accumulating ground layer and overburden in separate strip dumps; excavating open-pit field; smoothing thereof and ground layer laying. After open-pit field excavation the excavated space is filled with building waste up to high ground water layer. The building waste has composition close to that of natural minerals with different fraction dimensions. The building waste is laid in several layers each having thickness of 40-60 cm. Each layer is compacted with soil compactors or compacting mechanism. Then draining layer is laid. The draining layer is layer of gravel-sand ground with particle dimensions of not more than 200 mm and has thickness of not less than 0.6 m. The draining layer is compacted by vibratory plates. Then two parallel spiral channels are excavated along each pit perimeter from slope side. Coil of each channel starts at pit slope top and terminates at bottom thereof at upper ground water level. Both channels are filled with building waste having particle dimensions of not more than 150 mm. After that holes for trees planting are dug out, wherein the holes are arranged between channel coils. Drainage layer is located on hole bottoms so that the drainage layer is connected with building waste of the channels and holes are filled with fertile ground. Then perennial grass, bushes and trees are planted in the reclamated land.

EFFECT: reduced labor inputs and reclamation work costs, improved land protection against wind erosion and scouring.

2 cl, 1 dwg

FIELD: mining, particularly reclamation of surface-mined areas in agriculture and building industry.

SUBSTANCE: method involves selectively excavating, moving and accumulating ground layer and overburden in separate strip dumps; excavating open-pit field; filling and smoothing thereof and ground layer laying. After open-pit field excavation the excavated space is filled with building waste up to high ground water layer. The building waste has composition close to that of natural minerals with different fraction dimensions. The building waste is laid in several layers each having thickness of 40-60 cm. Each layer is compacted with soil compactors or compacting mechanism. Then draining layer is laid. The draining layer has particle dimensions of 150-200 mm and thickness of not less than 0.6 m. The draining layer is compacted by vibratory plates. Draining layer is covered with fertile ground so that fertile ground layer having thickness of not less than 0.3 m is created. Then straw layer in which chemical fertilizers and perennial grass seeds are added is formed over fertile ground layer. The straw layer is smoothed and sprinkled with dispersions containing water-soluble polymeric substances and synthetic water-soluble phosphates, wherein synthetic water-soluble phosphates are taken in amount of 1-4% by ready dispersion weight.

EFFECT: reduced labor inputs and reclamation work costs, improved land protection against wind erosion and scouring.

4 cl, 1 dwg

FIELD: earth recovery during drilling work performing.

SUBSTANCE: method involves waterproofing sump walls and bottom; filling thereof with used drilling mud; pumping-out liquid phase and filling thereof with peat and mineral ground. Liquid phase is previously accumulated in the sump and cleaned. Mineral ground, peat and used drilling mud are mixed one with another and supplied to bank slope or to road slope. Then grass is planted on slopes. Cleaned liquid phase is used for grass watering.

EFFECT: increased quality of earth sump reclamation.

1 dwg

The invention relates to a device for reclaiming and can be used in mining and transport construction

The invention relates to the field of mining, in particular for the remediation of the earth surface coastal zones of water objects

The invention relates to mining, in particular to the development of the tailings processing plants

The invention relates to mining and can be used for developing low-power and strong technological fields, in particular for the recovery of valuable components of rare and precious metals from old, reclaimed tailings

The invention relates to the protection of the natural environment and is intended for use in construction of oil and gas wells on land

The invention relates to the mining industry and can be used for backfill worked-out areas and created internal dumps

The invention relates to a method of agricultural use lignicola and coal mine fields resulting from the Stripping

FIELD: earth recovery during drilling work performing.

SUBSTANCE: method involves waterproofing sump walls and bottom; filling thereof with used drilling mud; pumping-out liquid phase and filling thereof with peat and mineral ground. Liquid phase is previously accumulated in the sump and cleaned. Mineral ground, peat and used drilling mud are mixed one with another and supplied to bank slope or to road slope. Then grass is planted on slopes. Cleaned liquid phase is used for grass watering.

EFFECT: increased quality of earth sump reclamation.

1 dwg

FIELD: mining, particularly reclamation of surface-mined areas in agriculture and building industry.

SUBSTANCE: method involves selectively excavating, moving and accumulating ground layer and overburden in separate strip dumps; excavating open-pit field; filling and smoothing thereof and ground layer laying. After open-pit field excavation the excavated space is filled with building waste up to high ground water layer. The building waste has composition close to that of natural minerals with different fraction dimensions. The building waste is laid in several layers each having thickness of 40-60 cm. Each layer is compacted with soil compactors or compacting mechanism. Then draining layer is laid. The draining layer has particle dimensions of 150-200 mm and thickness of not less than 0.6 m. The draining layer is compacted by vibratory plates. Draining layer is covered with fertile ground so that fertile ground layer having thickness of not less than 0.3 m is created. Then straw layer in which chemical fertilizers and perennial grass seeds are added is formed over fertile ground layer. The straw layer is smoothed and sprinkled with dispersions containing water-soluble polymeric substances and synthetic water-soluble phosphates, wherein synthetic water-soluble phosphates are taken in amount of 1-4% by ready dispersion weight.

EFFECT: reduced labor inputs and reclamation work costs, improved land protection against wind erosion and scouring.

4 cl, 1 dwg

FIELD: mining, particularly reclamation of surface-mined areas in agriculture and building industry.

SUBSTANCE: method involves selectively mining, moving and accumulating ground layer and overburden in separate strip dumps; excavating open-pit field; smoothing thereof and ground layer laying. After open-pit field excavation the excavated space is filled with building waste up to high ground water layer. The building waste has composition close to that of natural minerals with different fraction dimensions. The building waste is laid in several layers each having thickness of 40-60 cm. Each layer is compacted with soil compactors or compacting mechanism. Then draining layer is laid. The draining layer is layer of gravel-sand ground with particle dimensions of not more than 200 mm and has thickness of not less than 0.6 m. The draining layer is compacted by vibratory plates. Then two parallel spiral channels are excavated along each pit perimeter from slope side. Coil of each channel starts at pit slope top and terminates at bottom thereof at upper ground water level. Both channels are filled with building waste having particle dimensions of not more than 150 mm. After that holes for trees planting are dug out, wherein the holes are arranged between channel coils. Drainage layer is located on hole bottoms so that the drainage layer is connected with building waste of the channels and holes are filled with fertile ground. Then perennial grass, bushes and trees are planted in the reclamated land.

EFFECT: reduced labor inputs and reclamation work costs, improved land protection against wind erosion and scouring.

2 cl, 1 dwg

FIELD: environment protection, particularly to protect nature against dust blown off with wind from man-made massif surfaces.

SUBSTANCE: method involves contouring dust-forming surface and creating protective structures on dust-forming man-made massif surface in two mutually perpendicular directions, namely transversely to and along prevailing wind action directions; determining wind speed Vlim, m/s which provides maximum permissible dust concentration and maximal prevailing wind speed Vmax, m/s at massif sanitary zone boundary; partitioning man-made massif surface into square areas; installing protective barriers along protective barrier perimeters, wherein the protective barriers are formed of cellular material. Each square area has side length Lar determined from mathematical expression.

EFFECT: reduced dust carryover.

2 dwg, 1 ex

FIELD: mining, construction engineering, possible use during technical reclamation of quarry pits.

SUBSTANCE: method includes extracting the quarry field, forming paired stopping walls in extracted space of quarry field, filling the space between paired stopping walls by construction wastes, while preserving full height of draining and ventilation channels, and building a ceiling. After extraction of quarry field, present hanging sides of quarry walls are collapsed to impart required verticality to them, flexible longitudinal links are attached to quarry walls with following guniting of quarry walls with solidifying solution across whole perimeter of extracted quarry space. Then, quarry bottom is evened out with following densification by means of rolling with appropriate machines and devices, after that wells are drilled in soil by means of washout and soil is mixed with solidifying solution, then reinforcing cage is mounted therein with simultaneous feeding of concrete mixture for making iron-concrete pile in soil-cement cover, while diameters of soil-cement covers overlap one another, creating a foundation having increased filtration and hardness characteristics, paired stopping walls are built along perimeter of quarry, letting flexible longitudinal links through them with their following attachment inside paired stopping walls, and columns are set up to make a ceiling.

EFFECT: expanded area of possible use of extracted and reclaimed quarries, for example, for further industrial construction.

3 cl, 1 dwg

FIELD: mining industry, possible use for reclamation of damaged lands in agriculture, power-construction industrial branches.

SUBSTANCE: method includes, after extraction of quarry field is finished, closure of each quarry by reinforced structures made in form of sleeves of geo-synthetic material and filled with milled construction wastes, while ends of sleeves are sewn shut. Reinforced structures are placed one after another, closely to each other. On top of reinforced structures, draining layer is filled, then a layer of stripping rocks and finally a layer of potentially fertile soil with following seeding thereof with perennial grasses, brushes and trees.

EFFECT: decreased laboriousness and costs of restorative operations.

3 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method includes separation of fertile layer during opening of mineral resources and stocking of rock during extraction of same, planning of open mines by backfill with rock and application of fertile layer with restoration of vegetation in accordance to land usage direction. During backfill of rocks into open mines, inclined trench is made from earth surface to open part of exposed formation outlet being left in sides of mine, which provides access and following underground extraction of left deposit resources, and is meant to be a part of payable area.

EFFECT: combination of coal extractive processes with reclamation of lands and preservation of access to concealed resources for their later extraction.

4 cl, 5 dwg

FIELD: methods of underground or surface mining, particularly reclamation of surface-mined areas after production of building stone and other surface-sited minerals.

SUBSTANCE: method involves developing open-pit field; caving hanging walls of the pit; forming floor; installing one-sided form and filling the created space with claydite-concrete; arranging heat-insulation and water-proofing screen along pit wall so that the screen extends for the full wall length, wherein the heat-insulation and water-proofing screen includes heat-insulation material combined with waterproofing sheets of surface waterproofing agent; erecting paired support walls provided with natural ventilation system along pit perimeter so that the support walls are spaced predetermined distance from pit wall; covering space between paired support walls and pit wall with surface waterproofing agent and filling the treated space with ice.

EFFECT: extended field of exhausted pit usage, for instance for further freezing facility construction.

3 cl, 1 dwg

FIELD: mining and processing industry, particularly to reclaim soil in agriculture and building and power engineering industries.

SUBSTANCE: method involves performing selective mining, conveying and stacking ground layer and overburden in separate strip dumps; developing pit field; filling exhausted space with building waste in several layers along with rolling of each building waste layer; leveling thereof with overburden and laying ground layer. Pit is filled with building waste up to mid-height pit level, but not under ground water level. After that building waste is rolled and covered with overburden for total pit filling. Then overburden layer is leveled. To prevent ground settlement wells are formed along filled pit surface, wherein the wells are formed up to design depth and are filled with building waste with each building waste portion compaction. Overburden layer, building waste layer, reinforced structure level formed of geo-synthetic sleeves filled with building waste milled to obtain particle dimensions of not more than 150 mm are serially laid on filled pit.

EFFECT: decreased labor inputs and costs.

1 dwg

FIELD: construction and mining, particularly reclamation of pit depressions after building stone and other surface mineral production.

SUBSTANCE: method involves working out pit; filling the worked-out space; leveling thereof and laying ground layer thereon. After pit working-out ditch and water-draining trenches are formed along pit perimeter to impart regular geometrical shape to pit along with pit side flattening to obtain pit sides inclination of not more than 30° along with following pit side compaction by rolling thereof with compaction machines and mechanisms; pouring sand on designed pit slopes; laying impervious screen made of high-density polyethylene on sand layer; pouring ground layer having thickness of not less than 0.5 m on the impervious screen; covering pit bottom with clay layer; compacting clay layer and inclining thereof towards collecting well composed of reinforced concrete rings; arranging radial bed drainage of crushed stone and sand on pit bottom so that the drainage is directed towards collecting well; forming water-removal ditch along pit perimeter; filling the pit with compacted building waste briquettes; arranging clay screen having thickness of not less than 0.3 m over building waste briquettes; arranging plant layer on clay screen.

EFFECT: decreased labor inputs and reclamation work costs.

Up!