Method for cleaning-up of ore bed reservoirs beneath open pit bottom

FIELD: mining.

SUBSTANCE: method for cleaning-up of ore bed reservoirs is performed by means of desalination. In this respect, hole-drilling of solid ore is performed, as well as its explosive rupture, filling of blasted capacity with working solution and egress of product solution. Besides, the outer configuration of blasted capacity is drilled around at an angle equal to slope angle of working ledge. Along the centre line of blasted capacity all the way down the cleaning-up of ore bed an efficient well is drilled. The rest of ore body is drilled around by closed parallel rows of vertical wells. While stable roach is being blasted, all the capacity of blasted ore bed, including its outside configuration, is drilled around by vertical wells of the similar depth.

EFFECT: ensuring stability of open pit side and rising safety level of mining operations.

3 dwg

 

The invention relates to mining technology and can be used for the completion of the reserves remaining after the completion of mining in an open way, and when integrated and combined physical-technical and physical-chemical methods of mining.

Known combined methods the development of reserves of ore deposits, consisting of elements of the downhole and subsurface leaching systems, such as uranium. The proposed methods perform explosive destruction of the ore, magazynowania repulsed in volume, supply of reagents to the wells drilled from the surface, and receiving productive solutions in underground mining. The status of rocks reach partial release of ore from the cutting slit, blasting by-ore pillar in the trench with a volume greater than the volume of the pillar in 1,5-2 times, and Samoobrona Packed partially leached ore on the newly formed space [1, 2]. The disadvantages of these technical solutions is conducting a large amount of preparatory-threaded work, the high complexity of the formation of additional free space, which is Samoobrona ore.

Closest to the technical essence and the achieved result of the proposed method is the development of shallow reserves of the ore body by the method of underground leaching. The ore body is exposed from the surface of the wells with a diameter of 243 mm Block razvarivat chess grid wells on average 48 PM Central wells are compensating space, corner wells are explosive. For pumping a working solution using the well depth of 22 m, for pumping productive solutions - wells at a depth of 45 m with an angle of 2-3° to the vertical [3]. The disadvantage of this method is the impossibility of efficient mining pologozalegajushchih and inclined deposits.

The aim of the invention is the provision of pit slope stability, improving the safety of mining operations at the completion of the inventory under the bottom of the quarry.

This goal is achieved by the fact that the revision of reserves of ore deposits total depth revision of the ore reserves is determined by the formula: Hd=0,5(Dd-2b)tgα, where Nd- total depth revision of reserves, m; Dd- the radius of the bottom of the quarry, m; b - width of the ledge, m; α is the angle of the slope of the working bench, hail; the outer contour of the destroyed volume of ore array amerivault wells at an angle equal to the angle of repose of the working bench, and a depth equal tolocated on the bottom of the quarry at a distance equal to the width of the working of the ledge from the foot of the last ledge; on the axial line of the destroyed volume on all GLA is inu improvements stocks Buryats outstanding well and the rest of the ore body amerivault closed and located at a distance equal LNS apart, parallel rows of vertical wells, the depth within each row take constant, and between the rows variable, defined by the formula Lbi=Hd-niWtgα, where ni- the number of the parallel rows, counting from the Central issued by wells; W - value line of least resistance for a specific type of rocks determined in a known manner, m; in each row, vertical wells and in an inclined row of contour wells are drilling charge well:where Nδi- quantity charge wells in the i-th row; and equally distributed between the compensating non-rechargeable wells in the amount of

where Kp- the rate of loosening rocks at explosive crushing units.; W - value line of least resistance for a specific type of rocks determined in a known manner, m; Dpi- the diameter of the i-th unit of a closed series of vertical or inclined wells, m; ni- the number of the parallel rows, counting from the Central vydatnou well; dto- diameter compensation wells, M.

When finalizing the reserves of mineral deposits operations what's with resistant rocks destroy the entire volume of ore array including its external contour, amerivault closed parallel vertical rows of wells of the same depth equal to the depth revision of the reserves and the outstanding depth of the well increases by a value not less than 10 of its diameters.

The invention is illustrated by drawings, where figure 1 shows the completion of the inventory ore deposits under the bottom of the quarry, presents unstable rocks. Figure 2 shows the location of the contour, explosive and non-rechargeable wells at the bottom. Figure 3 shows the completion of the inventory ore deposits under the bottom of the quarry, presents sustainable rocks.

In the drawings shows an open excavation - 1; Board career - 2; the angle of the slope of the working bench - 3; the outer contour of the destroyed volume of ore array - 4; inclined wells in the external circuit of the destroyed volume of ore array - 5; the bottom of the quarry with the radius Dd- 6; revision reserves the depth Hd- 7; width of the ledge b - 8; charge wells of the i-th number is 9; the line of least resistance vertical wells (W) for a particular type of rocks - 10; the diameter of the i-th unit of a closed series of vertical or inclined wells Dpi- 11; evenly distributed between charged compensating non-rechargeable wells - 12; destroyed on the eat ore array 13; outstanding well - 14.

The way of completion of inventory of ore deposits under the bottom of the quarry includes the development of open mine workings 1, the creation of the pit 2 with the angle of repose of the working of the ledge 3, forming the outer contour of the destroyed volume of ore array 4 drilling and blasting inclined wells 5 and forming the perimeter of the radius of the quarry bottom 6 and the depth of development of the reserves of 7, the creation of employment sites ledge 8, the drilling from the bottom of the quarry charge wells 9 of the i-th row with the line of least resistance vertical wells (W) for a particular type of rocks 10, at each given diameter 11 of the i-th unit closed number evenly distributed between the charge wells of the compensating non-rechargeable wells 12, creating a destroyed volume of ore array 13 and the filling of the destroyed volume of the working solution and the issuance of a productive solution through outstanding well known construction 14.

The method is implemented as follows (figure 1).

After working career 1 to a maximum depth training to mining stocks under the bottom of the quarry by the method of underground leaching. To ensure the sustainability of the pit with the radius of the bottom 6 revision ore reserves lead to a depth of 7 revision Hd=0,5(Dd-2b)tgα, and obtaining useful is omponent - method of underground leaching. For this purpose on the bottom of the quarry at a distance from the flanges 2 career, equal to the width of the working of the ledge 8, along the sole of the last ledge produce blasthole drilling 5 at an angle of 3, equal to the angle of repose of the working bench, and a depth equal to

The remainder of the ore body amerivault closed and located at a distance equal to the line of least resistance 10 apart, parallel rows of vertical wells 9, the depth of which within each row take constant, and between the rows variable, defined by the formula: Lbi=Hd-niWtgα. In each row, vertical wells and in an inclined row of contour wells are drilling charge wells in the number of(figure 2). Available on the diameter 11 of the i-th unit closed several explosive vertical and inclined compensation wells contain uniformly distributed between compensation non-rechargeable wells 12 in the amount of

Blasting wells 5 and 9 creates an external circuit 4 destructible ore array and determines the amount of crushed ore array 13. Inside the outline destroyed ore mass produce the flow of the working solution, and the issuance of a productive solution is performed through : the expansion of the borehole 14.

At the completion of the inventory under the bottom of the quarry (figure 3), presents sustainable rocks, destroy the entire volume of ore array 13, including its external circuit 4, amerivault closed parallel rows of vertical wells 9 are the same depth equal to the depth revision of the inventory 7 and the outstanding depth of the borehole 14 increase in the amount of not less than 10 of its diameters.

Sources of information

1. Lunev LI Mining system development of deposits of uranium underground leaching / Under the General editorship of N. Chesnokov. - M.: Energoizdat, 1982. - 128 S.

2. AC 829887 the Method of underground leaching of minerals. Priority: 23.03.1979,, MKI: E 21 In 43/28, E 21 41/06.

3. Abramov A.V. Mining operations in the exploration for underground leaching. Exploration and conservation of mineral resources, 1983, No. 7, S. 39-42.

Way to Refine the ore reserves under the bottom of the quarry leaching, which includes the drilling of ore mass, its explosive destruction, filling the destroyed volume of the working solution and the issuance of a productive solution, characterized in that, to ensure the pit slope stability and security of work, the total depth of the improvements ore reserves is determined by the formula:
Hd=0,5(Dd-2b)tgα,
where Nd- total depth revision of reserves, m;
Dd- the radius of the bottom of the quarry, m;
b - width raboteg the ledge, m;
α is the angle of the slope of the working bench, deg;
the outer contour of the destroyed volume of ore array amerivault wells at an angle equal to the angle of repose of the working bench, and a depth equal tolocated on the bottom of the quarry at a distance of cos α, equal to the width of the working of the ledge from the foot of the last ledge on the axial line of the destroyed volume on the depth revision of reserves Buryats outstanding well known construction, and the remainder of the ore body amerivault closed and spaced from each other equal to the line of least resistance, parallel rows of vertical wells, the depth within each row take constant, and between the rows variable, defined by the formula:
Lbi=Hd-niWtgα,
where ni- the number of the parallel series, considering issuing from the Central bore;
W - value line of least resistance for a specific type of rocks determined in a known manner, m;
in each row, vertical wells and in an inclined row of contour wells are drilling rechargeable wells in quantity:

where Nδi- quantity charge wells in the i-th row;
and equally distributed between the compensating not charge well, if this (or sustainable is ornago rocks destroy the entire volume of ore array including its external contour, amerivault closed parallel vertical rows of wells of the same depth equal to the depth revision of the reserves and the outstanding depth of the well increases by a value not less than 10 of its diameters.



 

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