RU2004803C1 - Method for opencast mining of mineral deposits - Google Patents

Abstract

The invention relates to the mining industry, in particular to use in open pit mining of all types of deposits. The purpose of the invention is to increase the intensity of mining while ensuring the rhythm of work. Quarry field mining is carried out by adjacent blocks. The subsequent block is put into operation after reaching the current average overburden ratio in the previous average, after which they are worked out simultaneously. After working off an adjacent block, its worked out space is used for internal dumps of subsequent ones. 1 ill.

Description

The invention relates to the mining industry, in particular to use in open pit mining of all types of deposits.

There is a known method for open-cast mining of steeply falling strata, in which mining is carried out to the full depth of the quarry through transverse crossings with the general direction of development of the front of work on strike of strata and the organization of internal dumps, the beds of which are located at the same elevations with simultaneously worked out rock ledges 1.

The disadvantages of this method are the high capital costs during the initial cutting trench to the full depth of the quarry, which is associated with a high current stripping ratio, a small front of stripping and mining operations, which is formed by transverse cuts, which delays the development of production capacity and lengthens the terms of the construction of the quarry, as well as difficulties with maintaining the same elevations of the internal dumps with simultaneously practiced rock ledges.

Closest to the proposed technical essence is a method of open development of steeply falling formations, in which the quarry field is divided into blocks that are worked out alternately by longitudinal approaches with the direction of movement of the work front across the strike of the formation, and overburden rocks are located in the worked-out space of the adjacent block, and mining start from the most coal-saturated area with the removal of the rock to the external dumps 2f.

The disadvantages of this method are the unevenness of the mining regime, i.e. for each block, the current stripping ratio is constantly reaching its maximum value, as well as in difficulties with increasing the production capacity of the quarry.

0

5

0

5

0

5

0

An object of the invention is to increase the efficiency of field development.

The drawing shows a schematic diagram of the implementation of the proposed method.

The goal is achieved in that mining of quarries is carried out by adjacent blocks in accordance with the new technology, when each subsequent block is put into operation after reaching the current average overburden ratio in the previous average.

The proposed method of open development of mineral deposits is implemented as follows. The quarry field is divided into blocks. Development begins with the most coal-saturated block and when it reaches the average indicator of the current stripping ratio, the next block is put into operation with the removal of the rock to external dumps. After working off an adjacent block, its worked out space is used for internal dumps of subsequent ones. Block mining is carried out by longitudinal approaches with the direction of the front movement across the strike of the formation. This continues until the complete mining of the mineral with the subsequent construction of the internal waste in the worked out space.

In comparison with the known methods, the proposed one provides the rhythmic operation of the enterprise and allows one to increase production capacity due to the parallel operation of adjacent blocks, which leads to an increase in profit and shortens the pit mining life.

(56) Drums V.F., Tomakov P.I., Dergachev I.I. The development of steep and inclined formations in an open way with the placement of waste rock in a worked-out space - Ugol, 1959, No. 12. P. 6-8.

USSR copyright certificate No. 337516, cl. E21 C 41/00, 1961.

Claims (1)

The claims METHOD FOR OPEN DEVELOPMENT OF MINERAL DEPOSITS FIELDS, including quarrying of adjacent blocks, characterized in that, in order to increase the intensity the mining process, while ensuring the rhythm of work, when the current stripping ratio is reached in the processing block equal to its average value, the adjacent block is started to be worked out, and then they are worked out simultaneously. }  “,,„.,. S. . „., Z 2 :: ix zi 2 PtX; s sjssar; .y. lu fxxv. ,. . . . Jb, VС X J - / - e-p-0- (| -D-I OOOC I W