Hydraulic borehole mining method

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

 

The invention relates to mining and can be used for the production of loose, granular, semi-grained minerals through the production well. Known widely used method of hydropobic construction, phosphorus, titanium, zirconium, uranium, gold sand, with depths mostly up to 100 meters, the production Method is the drilling of vertical wells with the opening of the reservoir of minerals, fixing the desired interval of the well pipes, lowering into the well hydroporinae projectile, representing two or three concentrically arranged pipes or in parallel, which in the borehole to supply water under design pressure for erosion of rocks (Sands and other species) and the air for airlifting lifting system of the pulp. Thus blur breed and raise to the surface. In the well formed Luggage. When a certain amount is the collapse of the upper rocks and out of the crater collapse on the surface, which is dangerous for people and equipment working [Varens. Physico-chemical Geotechnology. Publishing house of Moscow state mining University. M., 2001, str-484].

The disadvantage of this method is that the cessation of production at a low coefficient of extraction of minerals (<15-20%), not the calling of the failure surface, resulting in decreases for e is here, becomes impractical in many cases to conduct such mining operations.

There is a method of mining in A.S. No. 1683375, eliminating the risk of education failure under operating hydroporinae installation. The essence of it consists in drilling at least two wells for area rock rock massive. It is recommended to apply an additional two wells transverse to the main plane. Creates a camera at the ends of the wells, which will collapse crushed minerals and hang over the camera large fragments of solid rock. The way it is supposed, judging by the profiles of wells, to apply for deep ore deposits in hundreds of meters. The disadvantage of this method is the limitation of camera, the possibility of its formation only in some cases, favourable geological conditions, as well as termination of receipt of milled fractions of minerals through the array of clastic rocks, i.e. not provided with the economy and the difficulty of drilling an arcuate inclined deep wells and cannot drilling on curved profile shallow wells due to the large radius of curvature.

There is also known a method of hydraulic borehole mining of minerals in A.S. No. 1541388 adopted for the prototype, the essence of which consists in drilling pemoline the Noah slant well below the angle of repose of the rock of the reservoir, opening the reservoir, installed in the borehole mining equipment, loosening of minerals and the removal of the hydrotransport on the surface. The disadvantage of this method is the limited amount of excavation of minerals one well, a significant number of remounting the rig in the working area of the field, low recovery factor of breed from an array.

The objective of the invention is the creation of a technologically advanced, secure way of a hydraulic borehole mining of minerals, providing an increase in the completeness of the extraction of their mineral resources, improving the efficiency of drilling and mining equipment, excluding cases falling technological equipment in the area undermined arrays.

Technical results that may be obtained by using the proposed invention are:

- the increase in the extraction of minerals:

the increase in the volume of extracted mineral one set of equipment;

- reducing the volume of construction works drilling and production equipment per unit mined;

- providing year-round drilling of wells and the extraction of minerals at a minimum cost in the cold season;

- improving UB is nya security technicians work surface and equipment.

The solution of the above problem and achieve the listed technical results became possible due to the fact that in the known method of a hydraulic borehole mining of minerals, including at one point the working area of the drilling machine, drilling at an angle to the horizon mining of inclined boreholes, installation of pipes, installation hydroporinae equipment, the rise of minerals on the surface, according to the invention at one point working on site installing the drilling machine with the possibility of rotation in azimuth and elevation in a vertical plane, with one position of the drilling machine in the same vertical plane are drilling at various angles to the horizontal several mining of inclined wells, namely: first-under minimum angle defined maximum length of the borehole reached by the drilling machine, the following is at its maximum angle defined by the zone of deformation of rocks, with no deformation of rocks in the zone of the installed equipment for mineral extraction and other mining slanted wells are drilled in this vertical plane under the angle to the horizon α3that α4... αpfor maximum cost-effective extraction of minerals, similarly Buryats mining inclined wells in the other is their vertical planes, turning the machine on azimuth angles γ1that γ2... γpand the production from these wells are groups in parallel or in series, providing a smooth release of overlapping species.

Applying for a drilling machine of the type ULB been developed and used for horizontal and directional drilling of the shafts, the method allows us to place the machine in the indoor, heated space and to ensure the work at any time of the year in any climate zone.

The drilling machine type ULB allows without remounting it to another place to drill dozens of holes. The extraction of minerals is carried out of one room, which excludes its transportation from the wells to the treatment facility. All this will greatly enhance economic efficiency is mined, will raise production standards and safety.

The invention is illustrated by the following figure.

Figure 1 is a radial cross-section of the vertical plane of the mine site area of mining works wells represented by a circle with a radius R.

The reservoir and the reservoir sediment N.

Figure 2 is a top view of a sector of a mine site with angle γ fans wells and bases of the cones vplyvania mineral with radius r in the roof.

Way of a hydraulic borehole mining of times the nutrient-grained rocks is as follows.

In the centre of the mining area (preferably a circle) at the point Of install at one point the drilling rig, for example UV-130, produced by FSUE VIOGEM, with the possibility of rotation in azimuth and elevation in a vertical plane and drill from one position of the machine at an angle to the horizon α1mining inclined borehole possible for the machine length l1crossing the epithelial stratum H and reaching the point And soles of the productive formation P (a minimum slope). Then in the same vertical plane passing through points a and Buryats second mining inclined borehole length l2at its maximum angle α2at point B, defined by the zone of deformation of the array, with no deformation of rocks on the surface and in the area of the installed equipment. Between them in the same vertical plane construct subsequent mining slanted borehole length l3, l4at points C and D on the sole of the productive formation P angles α3and α4accordingly, install pipe and mount hydroporinae equipment. Production from the well l1and l2lead with a gradual subsidence of the roof of the reservoir P, which is determined by the control boreholes or geophysical methods.

The operation subsequent wells l3and l4and the selection of them lead t is the train with the condition gradually lowered roof of the reservoir, that is determined by the angles of vplyvania mineral in these conditions. The maximum amount of extraction of minerals from the reservoir P is defined in cross section by a plane passing through the point O, And volume of cones with vertices a, B, C, D, the cross section of the cones vplyvania vertical plane passing through the axis of wells l1-l4.

After the maximum extraction of minerals from wells in the plane of the drilling rig rotates in azimuth angle γ1or γ2shown in figure 2, and construct a new mining inclined wells in the respective radial vertical planes to points on the sole of the productive formation C1C2or,, D1, D2, D3and so on, repeating the same cycles of works on the same technology, observing the efficiency and completeness of the extraction of minerals.

For the sake of completeness of the extraction of minerals it is possible to construct mining of inclined wells in two, three removable vertical planes of additional drilling rigs, and then the simultaneous extraction of minerals from the mining groups deviated wells located in different vertical planes, and the rest be used for water injection, other work, if this Bud is t to facilitate a smooth lowering of overlapping species formation N.

Drilling mining of inclined wells and mining produce, increasing the azimuthal angles of the cross section vertical planes and turning the machine clockwise or counterclockwise until the fullness of the mining site, with the exception of sector communications that work at the location of the drilling rig outside of this site, following the same principle of testing the remaining sector.

Monitoring and control of process mining mineral conduct as mining inclined wells and auxiliary inclined or vertical.

The practical applicability of the proposed method of hydropobic mineral show examples of specific applications.

Example 1.

Tara mining company (Tara in Omsk region) develops zircon-ilmenite Deposit by way of a hydraulic borehole mining.

The depth of the alluvial (sand, gravelistoe sediments, silts) 47-64 m

The mining method currently represents the drilling vertical wells to the top placers. Fastening the well pipe, drilling of productive horizon to the bottom deposits, descent hydroporinae projectile, erosion placers and the rise of the airlift slurry to the surface in the volume of 500-600 m3from one well. This production from the well terminates, t is to occur as landslides, dislodging the borehole walls with the release of the crater collapse on the surface, creating hazardous conditions technical personnel and equipment in the area of hole collapse. Sometimes this occurs when lifting the casing, which was temporarily fixed conventional directional well with a depth of 47 meters

To prevent failure of the drilling equipment into the funnel it is installed on a metal farm larger than the diameter of the intended funnel. Drilling rig with the farm moved to another safe place and again the cycle of drilling and mined repeated.

The disadvantage of this method is the low volume of extraction of minerals from the individual wells, and from the square of the field as a whole ≈17% in the adopted grid drilling production wells Tara CCP, the danger to operating personnel and rig in the formation zone of collapse.

In Siberia hydropobic is in season with positive air temperature (may-September, four months in a year).

Example 2.

By the present method in the center of the selected area of the field for testing build facilities for drilling and mining equipment in one or two blocks.

In underground parts of buildings have capacity for drilling fluids and pulp to extract useful is m fossil. The size of the double-height space for the location of several drilling rigs (just three) will be ≈300 m2. In another part of the premises have mud pumps, compressors, and other equipment for drilling fluid and primary processing of the pulp with minerals.

Carry out Assembly of the drilling machine. Buryats mining inclined borehole length of 200 m and a minimum angle at which reach the soles of the formation of minerals at a depth of 64 meters horizontal Distance from the drilling rig will be ≈190 m Then Buryats mining inclined borehole length ≈90 M. Slaughter it horizontally will be from the drilling rig at a distance of ≈70 m, and a possible zone of displacement of the rocks on the distance ≈30-35 m from the building equipment. Then between the mining inclined wells are drilling some more mining of inclined wells depending on the angle of the slope of the crater formed during the extraction of minerals, and economically feasible extraction of minerals.

Then, turning drilling rig in azimuth to the Bank angle to the left or right of the Buryats in the respective vertical planes of similar wells. Drilling rigs are mounted in wells hydroporinae shells and produce production from the wells of the mineral from the scheme is making them which provides smooth economically informed settling of overlapping species stratum H. At the same time can be drilling in other sectors and production in accordance with reasonable development system for recovery and economic feasibility.

After the work area, except for a strip of the location of the pipes, drilling and mining equipment to dismantle and assemble one drilling rig with complex mining equipment outside the working area for testing strips, previously used for communications.

The Deposit area, working on one set of equipment in this case, may be 10-12 hectares. The coefficient of extraction of minerals from the reservoir will be more than 60% against the recovery factor at the present time ≈17%. Theoretically, the amount mined from one well at the angle of repose ≈30° and a thickness of 17 m up to 30 thousand m3.

As can be seen from examples 1 and 2, the claimed set of essential features will allow you to create a secure and automated way of a hydraulic borehole mining of minerals and to provide increased extraction of minerals by one set of equipment and a single well.

How well hydrodone and minerals, including at one point the working area of the drilling machine, drilling at an angle to the horizon mining of inclined boreholes, installation of pipes, installation hydroporinae equipment, the rise of minerals on the surface, characterized in that at one point working on site installing the drilling machine with the possibility of rotation in azimuth and elevation in a vertical plane, with one position of the drilling machine in the same vertical plane are drilling at various angles to the horizontal several mining of inclined wells, namely, a first minimum angle defined maximum length of the borehole reached by the drilling machine, the following is at its maximum angle defined by the zone of deformation of rocks, with no deformation of rocks on the surface and in the area of the installed equipment for mineral extraction and other mining slanted wells are drilled in this vertical plane under the angle to the horizon α3that α4... αpfor maximum cost-effective extraction of minerals; similarly Buryats mining inclined wells in other vertical planes, turning the machine on azimuth angles γ1that γ2... γpand the production from these wells are groups in parallel to the series, providing a smooth release of overlapping species.



 

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