Hydraulic borehole mining of hard minerals

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used for hydraulic borehole mining of minerals. Proposed method comprises opening of the deposit via central and peripheral wells, placing the equipment therein and opening of adjacent chambers in layers, from bottom to top, starting from peripheral chambers. Prior to opening of the next layer through the entire bed thickness, undercut chamber is formed nearby soil of formed chamber and, parallel with said layer, of artificial ceiling of hardening material with inclination to centre. Shrinkage of fallen rock and filling of opened space with hardening material, opening and backfilling of central chamber at development of every chamber. After making of said artificial ceiling, several hydraulic cuts are made over the height of temporary wells. After formation of undercut space, rocks are hydraulically fractured from lower hydraulic cuts to force fluid into fracture unless rock failure into undercut space. Caved rock is partially flooded by hydraulic fracture fluid and giants to wash out the rock. As rock disintegrates, pulp is fed to the surface. As magazine level drops below design mark, hydraulic fracturing is repeated from hydraulic cut closest to stripped area, shrinkage, wash-out and discharge of pulp. Then, said jobs are repeated unless stripped area reaches aforesaid artificial ceiling. Now, shrunk rock is completely washed put, pulp is discharged and stripped area is filled.

EFFECT: selective extraction, decreased losses of minerals and costs, lower environmental effects.

8 cl, 5 dwg

 

The invention relates to mining and can be used in the development of mineral deposits by the method of hydraulic borehole mining. The application of this technical solution suitable for field development, presents bodies of ore formation, lenticular and other forms, including deposits, in which the reservoir is allocated on the content of useful component. Such fields include, for example, diamond-bearing kimberlite pipes of the Arkhangelsk region.

There is a method of hydraulic borehole mining of solid minerals, including opening deposits of the Central and peripheral technology wells, installation of equipment and testing at several stages layers from the bottom up nonadjacent cells, starting from the periphery, with education before working the next layer contour slit on the entire layer thickness, slash space jet in the soil formed by the camera and parallel artificial patrocina of the hardening material, with a slope from the periphery to the center, magazynowania collapsed rock mass and the mined-out space hardening material, testing, and bookmark the remaining peripheral cameras and, last but not least, testing, and backfilling of the Central chamber (see RF patent №21251601, CL IS 45/00, 1988).

This method allows selective excavation of minerals, presents separate sockets, lenses, layers, etc. In particular kimberlite pipes in which the distribution of diamonds is extremely uneven.

However, this method has some weaknesses. When the hardness of the host rocks is high enough, the jet array will require considerable energy and fluid consumption, and might prove ineffective. In this case, it is not excluded a significant loss of cristalleria. This is due to the fact that some crystals can remain intact "oversized".

A device for hydraulic borehole mining of solid minerals, including movable relative to each other, the external and the internal pressure of the column of pipes, Central polipovidnye the string of pipe installed in the cavity of the inner pressure of the column pipe and the auxiliary pipe with giant (see A.S. No. 1700249, CL IS 45/00, 1989).

This device most closely to the stated purpose, but it cannot perform the fracturing of rock mass, i.e. cannot implement the proposed method.

The problem to which the present invention is directed, the efficiency of mining of mineral deposits.

The technical result of the invention is the provision of the selectivity of the extraction, the decrease in the er mineral, reducing the cost of production and transportation, and reduce the harmful impact on the environment.

The technical result is achieved in that in the way of a hydraulic borehole mining of solid minerals, including opening deposits of the Central and peripheral technology wells, installation of equipment and testing at several stages layers from the bottom up nonadjacent cells, starting from the periphery, with education before working the next layer contour slit on the entire layer thickness, slash-and-burn area soil formed by the camera and parallel artificial patrocina of the hardening material, with a slope from the periphery to the center, magazynowania collapsed rock mass and the mined-out space hardening material, testing, and backfilling of the Central chamber, when testing each camera, after create artificial PetroChina, the height of technological wells create multiple hydroprobe, after the formation of the shifting space of the lower hydroprobe produce fracturing of rocks and pump in the resulting fracture fluid up to the collapse of the rock mass in the shifting space, collapsed rock mass partially zavodney due to fracturing fluids to and from hydro, which produce erosion of the rock mass, as the disintegration of the latter produced the lead issue of the pulp on the surface, when downgrading store below the design elevation, repeat surgery for fracture of hydroprobe closest to the worked-out space, magazynowania, erosion and delivery of the pulp, then the operation is repeated until reaching a goaf artificial PetroChina, after which produce a complete washout tamakaimoana rock mass, the issuance of the pulp and the mined-out space.

In the process of drilling allocate sites containing useful component and work only camera lying in these areas.

In some cases, after fracturing, the array is subject to collapse serves fluid under pressure required to saturate it rock mass, after which produce collapse, increasing the fluid pressure.

In addition, erosion lead from two hydro, one of which is a soil chamber, and the other above the level of Zapadnaya tamakaimoana mountain mass of the liquid.

It is advisable the linkage and slash space to form the fracturing and further giant washout from nearby production wells.

To improve the stability of the walls of the working section of the liquid in the store do not support above the level of the bottom contour of the wells.

To improve the disintegration of the rock mass in the liquid add surface-active ve is esta.

When large areas to be mined area between the peripheral and Central processing wells are drilling intermediate technological hole, development and testing of cells from these wells are similar to the working chambers of the peripheral wells.

To achieve a technical result, the device for hydraulic borehole mining of solid minerals, including movable relative to each other of the external and the internal pressure of the column of pipes, Central polipovidnye the string of pipe installed in the cavity of the inner pressure of the column pipe and the auxiliary pipe with giant, is provided with an additional monitor mounted on the inner discharge column pipe, and a nozzle fracturing, is placed on the outer discharge column pipe, while the auxiliary pipe is installed with the possibility of a fixed displacement relative to the internal pressure of the column of pipes and nozzle fracturing in the initial position overlaps the additional monitor and is made in the form of a housing with a cavity and Windows, around which has a hydraulic chamber, the outer walls are elastic, the body cavity communicated with the cavity of the hydraulic chambers, channels, and hydraulic cameras installed spring-loaded pistons, rods to the verge associated with hinged flaps.

This set includes all the essential features that are necessary and sufficient to achieve a technical result.

The invention is illustrated by drawings, where:

1 shows a General view of the working area in the incision;

figure 2 - testing the camera from the periphery of the well.

figure 3 - device for hydraulic borehole mining of solid minerals;

figure 4 - nozzle fracturing in the start position.

The mining is carried out as follows. Make the opening area 1 Central 2, 3 and peripheral, for wide working area, intermediate 4 technological wells. The contour plot of the Buryat contour contiguous wells 5.

Typically, these wells are drilled reduced, compared with the technological diameter.

Produce the lower layer to improvement. For this purpose, the height of the layer to create the contour slit 6 by any known method, the receiving chamber 7 in the Central 2 wells, inclined artificial ceilings of the hardening material 8 and, parallel to it, slash space 9.

Receiving chamber create a giant 10 device for hydraulic borehole mining of solid minerals 11, which is loose on the string of pipe 12 of the Central hole 2. Then on the column pipe 13 in the peripheral wells is 3 also omit the device for hydraulic borehole mining of solid minerals 14.

Through collaboration devices for hydraulic borehole mining 11 and 14 produce the formation of sboc slit to create artificial PetroChina 8 and slash space 9.

Testing begins with peripheral chambers.

After creating artificial PetroChina 8 in the chamber 15 to the height of the technological hole 3 create multiple hydroprobe 16. After the formation of the shifting space 9 from the bottom of undercut produce fracturing of rocks and pump to the hydraulic fracture fluid up to the collapse of the rock mass array 23 in slash space 9. The collapsed rock mass magazineabout and partially zavodney due to fracturing fluids.

After that include hydro and produce erosion and partial flooding tamakaimoana rock mass (hereinafter store 17).

Under the action of additional giant 18, the device for hydraulic borehole mining of solid minerals 14, there is a partial erosion of the store 17 above the level of liquid 19 and the feed flooding the store. Under the action of water filling of the magazine 17 is disintegration rocks, and the jetting device 20 for hydraulic borehole mining of solid minerals 14, working in the conditions of a flooded pit, finally puts them will be dissolved state and the direction it is in the direction of the breakthrough with a Central bore 2 contributes to the production of pulp. As the disintegration of the rock mass produce the issuance of the pulp to the surface. When downgrading store 17 below the design elevation of repeat surgery for fracture of the shear 16, closest to the worked-out space 22, magazynowania, erosion and discharge of pulp. These operations are repeated to achieve a goaf 22 artificial PetroChina 8.

After that make a complete washout store 17 and the output of pulp on the surface. Then lay the mined-out area 22 of the chamber 15 and pass to testing the following non-contiguous peripheral camera. Then, if drilled intermediate technological hole 4, similarly, produce a practice of cameras from them. In the last turn produce the development of the Central chamber of the Central bore 2 of the device for hydraulic borehole mining of solid minerals 11.

As testing each camera is laid hardening bookmark. Simultaneous testing of multiple non-contiguous cells of the same type of technological wells. For example, at the same time can work the camera from the peripheral wells 3 and 24.

To improve the disintegration of the rock mass in the array, subject to collapse, after crack formation fracturing, it serves fluid under pressure required for saturation of the rock mass, but insufficient is passed to collapse. This operation can be performed simultaneously with magazynowania, erosion and partial granting of the pulp obtained after the collapse of the previous array.

After working layer are transferred to development upstream.

If minerals are represented by sockets, lenses, layers, etc. in the process of drilling allocate sites containing useful component, for example containing diamonds, and work out the layers and/or camera lying only in these areas.

To facilitate education slash space 9 and to create artificial PetroChina 8 in series between the Central 2 and intermediate, intermediate, and peripheral 3, 24, etc. are breakthrough. Breakthrough can be created due to the only jet of these adjacent wells, and in two stages - the first stage of the fracture, the second jetting washing of the wells, between which is passed linkage. The second technology is better, since after fracturing through the resulting crack will produce pulp that is obtained when the giant in the intermediate and/or peripheral production well 3.

To ensure the disintegration of the collapsed rock mass and conservation of the wall section from collapse, it is advisable liquid in the shop to support above the level of the bottom contour of the wells.

For intensification of the process d is integratsii use of surface-active substances, which add to the liquid.

Device for hydraulic borehole mining of solid minerals includes movable relative to each other the outer 25 and inner 26, with an additional monitor 27, the pressure of the column of pipes, Central polipovidnye the string of pipe 28 that is installed in the cavity of the inner pressure of the column of tubes 26, and the auxiliary pipe 29 with the monitor 30. Auxiliary pipe 29 is installed with the possibility of a fixed displacement relative to the internal pressure of the column of pipes 26 and has shared with her cavity.

Central polovina column pipe 28 can also be movable relative to the internal pressure of the column of pipes 26. At the discharge end of the outer pipe string 25 posted by nozzle fracturing 31 in the initial position overlying the monitor 30. Nozzle fracturing 31 is made in the form of a housing with a cavity 32. In the casing of the window 33, around which has a hydraulic chamber 34 with an elastic outer wall 35. The cavity 32 of the housing communicates with the cavity of the hydraulic chambers 34 and channels 36, and in the cavities of the hydraulic chambers placed spring-loaded by springs 37 and piston 38, the rods 39 which are connected with hinged flaps 40.

The device operates as follows. On the surface, prior to immersion of the device in the hole, let the Chairman pipe 29 is moved relative to the internal pressure of the column 26 and is fixed in position, when the monitor 30 is located at a specified distance from the secondary jetting 27 and is focused on it. The distance between the hydro is selected from the conditions of the monitor 30 in the soil chamber, and additional giant 27 - above Zapadnaya store 17 of the liquid 19. Then lowered into the well pipe string, and the nozzle fracturing 31 overlaps the additional monitor 27.

When the flow of fluid in the inner column of the discharge pipe 26, it enters the monitor 30 and produces erosion of the surrounding rocks. As an additional monitor 27 is blocked by the nozzle fracturing 31, no water is flowing from him and additional monitor 27 is not working.

In this mode the device operates when creating sbec shifting space of the cavity to create artificial PetroChina 8 and roots 16, i.e. the initial cavities. The creation of these cavities can be carried out in several stages, for which the device is moved along the height of the well. Movement can be both bottom up and top down, which is more appropriate, because after creating a shifting space monitor 30 remains in the soil camera for use during testing.

After creating a shifting space of the nozzle fracturing 31 placed at the outer nagn the test column pipe 25, set against the first bottom shear. Then on the external discharge column pipe 25 is fed to the nozzle fracturing 31 liquid. The liquid flows into the cavity of the housing 32, through the channels 36, the fluid enters the hydraulic chamber 34, stretches the resilient outer wall 35 and presses them to the walls of the borehole, the insulating part between the said chambers.

The spring 37 is designed so that the piston 38 will begin to move after isolation of the well and the pressure in the hydraulic chambers 34. When moving the piston 38 carries a rod 39, which in turn move the shutters 41 and 42 of the flaps 40 and open the Windows 33. Fluid from the housing cavity 32 comes in box 33, next to the isolated portion of the borehole and shear. The liquid may be supplied as in the mode of fracture (the undercut 23 is the development of cracks 43)and the water saturation of the array.

When you open the window 33, the pressure in the hydraulic chambers 34 may fall, but the spring 27 will return at some distance rods 39 and partially overlapping the window 36, the flow of fluid in the isolated portion of the well will decrease, and the pressure in the hydraulic chambers 34 will increase. Thus, regulation of the ratio of the pressure in the hydraulic chambers 34 and isolated part of the well, and under any circumstances part with the vazhiny be reliably isolated by pressing the elastic outer wall 35 of the hydraulic chambers 34 to the walls of the well.

After the collapse of the array 23 to move the inner column injection pipes 26 to release the additional nozzle jetting 27 of the nozzle fracturing 31. The liquid begins to flow in both giant 30 and 27, producing erosion shop 17, the first in the flooded conditions of the face, second - drained.

Nozzle fracturing 31 can be used only as a packer. For example, when creating cracks fracturing pumping water through the monitor 30 in the undercut (undercut can be tilted) when creating a shifting space, downhole portion of the wellbore is isolated by flow of the liquid in the nozzle fracturing 31 under pressure, providing a clamped elastic outer wall 35 of the hydraulic chambers 34 to the walls of the borehole and insufficient fracturing of the window 33.

The application of this technical solution will significantly reduce development costs. Moreover, due to the fact that the method provides selective dredging individual nests and interlayers and abandonment of the array without destroying the host nest of rocks, which if known technologies also were destroyed and brought to the surface, it becomes cost-effective to develop the deposits with low content, but a compact concentration of the useful component. Such fields include many diamondiferous kimberlites of the e tube Arkhangelsk region, in which nests with high diamond content are in the array is "empty" kimberlite.

In addition, significantly reduced the harmful effects on the environment, because, selectivley method requires significantly less water on the surface will not rise a significant amount of rocks, which entails a reduction of the area of pits and tailings.

1. Way of a hydraulic borehole mining of solid minerals, including opening deposits of the Central and peripheral technology wells, installation of equipment and testing at several stages layers from the bottom up nonadjacent cells, starting from the periphery, with education before working the next layer contour slit on the entire layer thickness, slash-and-burn area soil formed by the camera and parallel artificial patrocina of the hardening material, with a slope from the periphery to the center, magazynowania collapsed rock mass and the mined-out space hardening material, testing, and backfilling of the Central chamber, when testing each camera, after creating artificial PetroChina, height technological wells create multiple hydroprobe, after the formation of the shifting space of the lower hydroprobe produce fracturing of rocks and pump to receive the ing the crack fluid up to the collapse of the rock mass in the shifting space, the collapsed rock mass partially zavodney due to fracturing fluids to and from hydro, which produce erosion of the rock mass, as the disintegration of the latter produce the issuance of the pulp on the surface, at the lower level of the store below the design elevation, repeat surgery for fracture of hydroprobe closest to the worked-out space, magazynowania, erosion and delivery of the pulp, then the operation is repeated until reaching a goaf artificial PetroChina, after which produce a complete washout tamakaimoana rock mass, the issuance of the pulp and the mined-out space.

2. Way of a hydraulic borehole mining of solid minerals according to claim 1, in the process of drilling allocate sites containing useful component and work only camera lying in these areas.

3. Way of a hydraulic borehole mining of solid minerals 1 and 2, after fracturing, the array is subject to collapse serves fluid under pressure required to saturate it rock mass, after which produce collapse, increasing the fluid pressure.

4. Way of a hydraulic borehole mining of solid minerals according to claim 1, erosion lead from two hydro, one of which is a soil chamber, and the other above the level of Zapadnaya tamakaimoana mountain mass of the liquid.

5. SPO is about hydraulic borehole mining of solid minerals according to claim 1, the linkage and slash space formed by fracturing and further giant washout from nearby production wells.

6. Way of a hydraulic borehole mining of solid minerals according to claim 1, the liquid in the store do not support above the level of the bottom contour of the wells.

7. Way of a hydraulic borehole mining of solid minerals according to claim 1, in liquid type surfactants.

8. Way of a hydraulic borehole mining of solid minerals according to claim 1, between the peripheral and Central processing wells are drilling intermediate technological hole, development and testing of cells from these wells are similar to the working chambers of the peripheral wells.



 

Same patents:

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2 cl, 2 dwg

FIELD: mining industry, particularly borehole mining.

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EFFECT: increased efficiency of mining operation and increased environmental safety.

5 dwg

FIELD: mining industry, particularly borehole mining.

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EFFECT: increased efficiency of mining operation and increased environmental safety.

5 dwg

FIELD: mining industry, particularly to produce loose, soft or single-grained minerals through production boreholes.

SUBSTANCE: method involves installing drilling rig in one point of area to be treated; drilling inclined production boreholes at an angle to horizon; installing pipes in the borehole; assembling hydraulic production equipment and lifting mineral to surface. Drilling rig is installed in one point to be treated so that the drilling rig may perform azimuth and angular rotation in vertical plane. Several production boreholes extending at different angles to horizon in common vertical plane are drilled by the drilling rig. The first borehole has minimal angle defined by maximal possible length of borehole, which can be drilled by the drilling rig. The next borehole has maximal angle defined by rock deformation area to prevent rock deformation on surface and in mineral production equipment installation area. Remainder boreholes are drilled in the same vertical plane at α3, α4, ... απ angles to horizon, which maximizes efficiency of mineral production. Similar inclined boreholes are drilled in other vertical planes by rotating the drilling rig in azimuth direction through γ1, γ2 ... γπ angles. Mineral is produced simultaneously or sequentially from borehole groups to provide smooth lowering of overlaying rock.

EFFECT: increased mineral removing fullness with the use of single equipment unit, reduced amount of construction-and-assembling operations, possibility to perform operations in any season, reduced costs of operation performing in cold season, increased safety for staff and equipment.

2 dwg, 2 ex

FIELD: mineral field development by hydraulic mining methods, as well as borehole drilling and all-purpose underground cavities creation.

SUBSTANCE: device comprises connection pipe for pressure water. Connection pipe of slurry pipeline has conical constricted section, wear-resistant insert made as spaced rings of wear-resistant material installed downstream from the conical constricted section in slurry flow direction, and conical widening section arranged downstream from the rings. Connection pipe of slurry pipeline has orifices made in area of ring location and adapted to supply pressure water into connection pipe of slurry pipeline via gaps defined between the rings. Hydraulic elevator is arranged at end of connection pipe for pressure water. Connection pipe for pressure water and hydraulic elevator may have water-jet nozzles. Gaps between rings of wear-resistant insert are created due to ring end roughness. As pressure water is supplied part of flow moving via annular gap passes through annular hydraulic elevator and enters into connection pipe of slurry pipeline to create ascending flow. Due to created vacuum washed mineral is sucked into connection pipe of slurry pipeline in slurry form and then transported to surface.

EFFECT: reduced wear of inlet connection pipe part.

3 cl, 1 dwg

Hydraulic monitor // 2272143

FIELD: methods of hydraulic mining, particularly hydraulic monitors for rock breakage with water jets.

SUBSTANCE: hydraulic monitor comprises base, hinge assembly and barrel with nozzle. Through pipe extending along barrel axis is installed in barrel channel and supported by centrators. The first pipe end is communicated with atmosphere, another one is located in the nozzle. Pipe-nozzle diameter ratio is 0.50-0.57. The pipe serves as ejection means. As high pressure water passes through the nozzle streamlined air bubble is created at pipe outlet due to air ejection. Air bubble pressure is less than atmospheric pressure. This provides jet compression at nozzle outlet and as a result increases jet range. Abrasive and chemical materials may be used with water jet to improve rock breakage efficiency.

EFFECT: increased efficiency.

1 dwg

FIELD: mining, particularly to develop gold-bearing rock with high clay content.

SUBSTANCE: method involves loosening rock by applying mechanical action to the rock along with periodically initiating elastic vibrations in ultrasonic-frequency band with constant frequency in clay-sand rock - water system, wherein the elastic vibrations are initiated under constant outer pressure and power for different time periods; determining optimal action application time to provide stable clay particle precipitation in clay-sand rock - water system having constant volume during previously choosing controllable particle dimension range; determining conditional transformation coefficients from mathematical expression; making plot of conditional transformation coefficient change as a function of time; determining increase of controllable initial specific surface of particles to be loosened and halving ultrasound power when controllable initial specific surface of particles to be loosened is increased by an order.

EFFECT: reduced specific power consumption.

6 dwg

FIELD: geotechnology, particularly bore mining in wide range of mining and geological conditions.

SUBSTANCE: method involves drilling bore extending for the full thickness of underground mineral formation; cutting the underground mineral formation in chamber coaxial to the bore with the use of water-jet devices. Before hydraulic formation cutting rock massif is moistened by supplying pressurized water in bore for a time period enough to expand moistened zone for necessary distance, wherein water pressure is less than pressure of hydraulic formation cutting. After formation moistening water-jet device is lowered in the bore to cut mineral in moistened zone adjoining the bore. After that formation moistening and cutting operations are repeated to create chamber having predetermined dimensions.

EFFECT: reduced power inputs for hydraulic rock cutting.

2 dwg

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