Construction method of non-working open-pit wall

FIELD: mining.

SUBSTANCE: method involves formation of non-working projections, transport offramp, horizontal and inclined safety berms. Inclined safety berms are formed in places of their junction to transport offramp. Slope of sections of inclined safety berms is restricted in compliance with technical characteristics of machines and mechanisms used for cleaning of safety berms from rockslides and rockfalls.

EFFECT: reduction of volume of development operations and improvement of conditions of mechanical cleaning of safety berms from rockslides and rockfalls.

3 cl, 2 ex, 5 dwg

 

The invention relates to the mining industry and can be used for open development of mineral deposits of minerals in the formation outside of the pit.

There is a method of detuning outside of the Board, including the formation of broken ledges, the inclined construction of the safety berms and transport Congress (see Galkin A.M., Galkin, V.A., Popov V.N. Experience in the design and construction of the pit with sloping safety berms): Tsvetmetinformatsiya, 1977 - 35 C.).

The disadvantages of this method are the large amounts of gornoobogatititelnyh work and no parcel contiguity of safety berms to transport Congress, making it difficult mechanized cleaning of the berm from the scree.

Closest to the claimed invention to the technical essence is a way of tuning out outside of the pit, including the construction of transport Congress and the safety berms with catching grooves, and a safety berm perform on individual horizons in the form of divided detecting areas of individual berms, having the form of truncated prisms, adjoining to the slope of the ledge with the division of career on the internal and external zones. In the outer zone rebuilt sloping safety berm and into the inner horizontal (see patent P is No. 2171893 from 01.06.1999, IPC7E21C 41/26).

The disadvantages of this method is a significant amount gornoobogatititelnyh works in the inner zone of the quarry due to the detuning of safety berms throughout the length of the transport conventions.

Technical problem on which the invention is directed, is the reduction gornoobogatititelnyh works in the inner zone of the quarry, by reducing the width of the plot pair of safety berms with transport Congress.

This result is achieved in that in the known method of detuning outside of the pit, including the formation of spiral outside ledges, transport Congress, horizontal and inclined safety berms, the latter being constructed directly in the places of their attachment to transport Congress, and the slope of the inclined sections of the safety berms choose, based on the technical characteristics of used machines and mechanisms, and transport Congress have so that the loaded transport has the ability to move the lower edge of the overlying ledge, and empty by the upper edge of the lower ledge.

In addition, the spiral Congress have counterclockwise, and the slope of the inclined sections of the safety berms choose within 160-180‰.

The set of the above submit the Cove eliminates the disadvantages of existing methods of operation outside of the pit - reduce gornoobogatitelnyi work in the inner zone of the quarry by reducing the width of the plot pair of safety berms with transport Congress.

The essence of the invention is illustrated by drawings, where:

1 shows a transport Congress at the moment of approach of mining when mining bench marks 0,0-10,0.

Figure 2 shows a transport Congress at the moment of approach of mining when mining bench marks 10,0-20,0.

Figure 3 shows the plan of the quarry by a known method (prototype).

Figure 4 shows the career plan of the proposed method.

Three-dimensional model of the known and proposed methods (figure 3, figure 4) are presented in Annex 1.

Figure 5 shows a combined section a-a in figure 3 and 4.

In figures (1-4) shows the transport exit 1 completely 2. Sloping of the safety berm 3 and 4 are constructed in the ground near them to transport exit 1, and a horizontal safety berm 5 and 6. The inner edge transport berm prototype 7 are presented for visual comparison with the inner edge transport berm by the present method.

With the approach of the mining area on the junction of safety berms to transport exit 1 (figure 1) leave the pillar 2, which construct a sloping berm 3 connecting lines is bound exit 1 horizon 10,0, work bench 0,0-10,0.

Then (2) transport exit 1 extend to the horizon 20,0 by the conventional methods, construct a sloping berm 4 are shaped ledge 10,0-20,0 form a horizontal berm 5 and 6.

Thus the slope of the sloping berms 3, 4 limit in accordance with the technical characteristics of machines and mechanisms used for cleaning berms from slides and cave-ins, and the length of the junction of safety berms to transport Congress shall not be less than 4 times the width of the transport of Congress.

For the technical disclosure of the nature and advantages of the proposed method shows a conventional example with reference to the following conditions:

The original data. Depth of the pit - 90 m

Width transport Congress - 25 m

The width of the safety berms - 10 m

The slope of transport Congress - 80‰.

The slope of the sloping berm - 160‰.

With the approach of the mining area on the junction of safety berms to transport exit 1 work bench in horizons 0,0-10,0 and leave the pillar 2, which construct an inclined safety berm 3 slant 160‰. The junction of the sloping berm to transport exit 1 take 50 m from the centre of the area of the junction. Then deepen the transport exit 1 to the mountains. 20,0 with a slope of 80‰ and construct a sloping berm 4 50 m from the centre of the site of the junction with incline 160‰, with abayat a ledge horizons 10,0-20,0 form a horizontal berm 5 and 6.

Opubco transport Congress produced by conventional known technology penetrations sloping trenches or palutena (not shown).

The volume of Stripping operations is determined as follows.

Figure 4 shows the inner edge 8 of the transport berm on the proposed method and the inner edge 7 at the offset of the pit with horizontal safety berms (figure 3). Figure 5 shows a combined cross-section a-A. From 3, 4, 5 it is seen that with the proposed method, the width of the transport of exit decreases, and consequently decreases and the volume of mining operations, (or increases the useful volume of the quarry) which is for the above example,

where l,a- the average length and width of the exclusion area, respectively, 100 and 10 m;

Z - average depth of the area of the junction - 45 m;

n - number of lots landfall in career 3 units

Substituting in the formula the values of the parameters, we can get a volume reduction Stripping

V=100*10*45*3=135000 m3.

By analogy with the conventional example, it is possible to determine the possible reduction gornoobogatititelnyh works for the conditions, for example, Sibai career, provided that:

Depth of the pit - 390 m

Width transport Congress - 25 m

The width of the safety berms - 10 m

The slope of transport Congress - 80‰.

UCLA the sloping berm - 160‰.

Reduction gornoobogatititelnyh works will be: V=100*10*195*12=2340000 m3.

The decrease in gornoobogatititelnyh works is determined by reducing the technologies used in the sinking of the sloping trenches or palutena in the construction of inclined safety berms, which by a known method - 50% of the total.

The proposed method volume sloping berms is 5% of the total gornoobogatititelnyh works. According to (RF Patent No. 2171893 7 E21C 41/26. 2001) replacement sloping berms on the horizontal reduces the amount gornoobogatititelnyh works by 60%.

In addition to improving the technical and economic indicators of the enterprise proposed method allows sites adjunction of safety berms to transport Congress of machines and mechanisms to drive on the berm and make their mechanized cleaning of slides and cave-ins, which increases the safety at the mine.

Therefore, the application of the proposed method of detuning outside the pit allows you to significantly improve career technical indicators by reducing volumes gornoobogatititelnyh works. In addition, the proposed method can improve safety by providing mechanized cleaning of safety berms from slides and cave-ins.

1. The way ostroy and outside the pit, including the formation of spiral outside ledges, transport Congress, horizontal and inclined safety berms, characterized in that the sloping of the safety berm constructed directly in the places of their attachment to transport Congress, and the slope of the inclined sections of the safety berm is chosen based on the technical characteristics of used machines and mechanisms, and transport Congress have so that the loaded transport has the ability to move the lower edge of the overlying ledge, and empty by the upper edge of the lower ledge.

2. The method according to claim 1, characterized in that the spiral Congress have counterclockwise.

3. The method according to claim 1, characterized in that the slope of the plots of safety berms choose within 160-180‰.



 

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