RU1786270C - Method for mineral opencast mining - Google Patents

Abstract

The invention relates to mining and can be used in open pit mining. The purpose of the invention is to simplify mining technology and reduce development costs by eliminating the delay in developing additional equipment jumper while increasing the receiving capacity of the blade. This is achieved by conducting mining operations ahead of one of the blocks by an amount determined by the mathematical dependence. Overburden is poured into the worked-out space of the block adjacent to the jumper. Downhole transport communications of the lagging block are extended to the waste rocks of the adjacent block. Main transport communications are established on dump rocks of the leading unit. The jumper is worked out together with the rocks of the lagging unit. 1 ill. CO C

Description

The invention relates to mining and can be used in open pit mining.

There is a method of open development of mineral deposits, including the installation of trunk transport communications on the basis of minerals.

The disadvantage of this method is the unfavorable operating conditions of transport communications due to their flooding by groundwater and flood waters.

As a prototype, a method of open-pit mining of mineral deposits is adopted, including mining the field in blocks while leaving a pillar-jumper between the blocks to arrange trunk transport communications.

The disadvantage of this method is the preliminary cleaning of trunk communications, which is laborious, organizationally difficult, requires additional equipment and increases the cost of fossil mining to work out the bulkhead jumper with minerals.

The purpose of the invention is to simplify mining technology and reduce development costs by eliminating the delay in developing additional equipment jumper while increasing the receiving capacity of the blade.

This goal is achieved by the fact that in the known method of open-pit mining of mineral deposits,

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including the development of the field in blocks, the installation of downhole and main transport communications between adjacent blocks, the overburden of the overburden in the worked-out space of the blocks, the development of a jumper from minerals, and the development of one of the blocks ahead of at least a value determined from the expression

L H + h ctga + N + L, m, where L is the block lag, m;

N is the width of the working area of the lower ledge of the leading unit, m;

h is the height of the embankment, m;

a - slope angle of the embankment, degrees;

N is the minimum bandwidth for transport communications, m;

L is the width of the entry lagging unit, m,

overburden is poured into the developed space of the leading block adjacent to the jumper, the bottomhole transport communications of the lagging block are extended to the dump rocks of the adjacent block, the main transport communications are installed on the dump rocks of the leading block, and the jumper is worked out together with the rocks of the lagging block.

The proposed technical solution makes it possible to simply and efficiently operate a jumper with a fossil, on which part of the main transport communications is located.

This is achieved by the proposed technology of work in blocks, which allows you to form and then work out the jumper as a whole with the rocks of the lagging block.

The drawing shows an example implementation of the method in plan.

The following designations are accepted: 1 embankment, 2.2 trunk lines. communications of leading block A on embankment 1, 3.3 - the same on the bulkhead, 4.4 - transport communications connecting them, 5.5 - downhole communications of block A, 6.6 - the same lagging block B, 7, 7 - trunk communications on the embankment 1 of block B, 8 - the free part of the pillar of the jumper to be worked out, 9 - the bottom of block B.

The arrows indicate the directions of block mining. The lower step is worked out for transport communications located on its roof.

As the leading block A is mined, embankment 1 is formed in its worked out space.

part of the main communications 2.2 of block A. With the remaining part 3.3, located on the entire jumper, they are connected by transport communications 4.4. To place

excavated fossil build up this embankment 1, move communications 4.4 on it, increase the length of communications 2.2 and again restore their connection with communications 3.3, which, in turn,

move along its axis to their connection with bottomhole 5.5. Downhole communications also before this move after the spent minerals. Embankment buildup, displacement

communications 2-5 are equal to the width of the worked-in entry A or a multiple of its value. The lagging block B is shifted back relative to block A. The minimum displacement value is determined from

expressions:

L H + h ctga + N + L, m, where L is the value of the block lag, m;

H is the size of the working zone of the lower ledge of the leading unit, m (required for

unhindered operation of equipment occupied on a recess of a ledge); h is the height of the embankment, m; a - angle of slope, degrees; N - minimum bandwidth for

placement of transport communications, m:

N Si + 82 + 5З + S4 + Ss, m, where Si is the distance between the upper edge of embankment 1 and the communication axis 4, m;

For - the distance between the communication axes 4 and 4 of the upper ledge, m;

5c the distance between the axes of communications 4 and 6 serving the upper ledge of blocks A and B, m (taking into account the transfer of downhole

the communications of the lagging unit to a new position after practicing an approach of width L, the gap 5z is chosen equal to its width L, plus the gap A, which should remain between the communications serving the upper ledge);

SA is the gap between the transport communications serving the lagging unit B, m;

Ss is the distance necessary to place equipment designed to open the slope of the jumper from waste rock, m (since it is natural to open the slope of the jumper to the width of the lead L of block B, this distance can be called

the distance from the communication axis serving the lower ledge to the upper edge of the run, which the lagging block B is working out);

L is the width of the insertion or slope, which is used for block B.

Downhole communications 6.6 of block B extend beyond the pillar of the bridge to the embankment 1. On the embankment, they are connected to the main communications 7.7.

As the mining of fossil in the block

8 downhole communications 6.6 move after the spent mineral. At the same time, they free part (part is equal to the width of the entry or a multiple of it) of the rear-jumper 8, which is worked out by the face

9 block B as part of a fossil occurring in the contours of its entry L

The technical advantages of the invention lie in the simplicity of working out the bulkhead under the main conveyors.

Claims (1)

Formula for open-pit mining of mineral deposits, including mining the field in blocks, installing bottom-hole and trunk transport communications between adjacent blocks, dumping overburden into the mined-out space of blocks, mining the bulkhead from the mineral, which means that, with the aim of simplification of mining technology and reduction of development costs by eliminating the delay in working out additional equipment jumper while increasing the receiving capacity of the blade, mining of one of the blocks is carried out ahead of at least a value determined from the expression L N ctga + N + L, m where N is the width of the working area of the lower ledge of the leading unit, m; h is the height of the embankment, m; "- the slope angle of the embankment, hail; N is the minimum bandwidth for transport communications, m; L is the width of the entry lagging unit, m, overburden is poured into the developed space of the leading block adjacent to the jumper, the bottomhole transport communications of the lagging block are extended to the dump rocks of the adjacent block, the main transport communications are installed on the dump rocks of the leading block, and the jumper is worked out together with the rocks of the lagging block.