SU1765403A1 - Mine field recompletion method - Google Patents

Description

(21) 4881622/03

(22) 11.11.90

(46) 09/30/92. Bul Number 36

(71) Research Institute for the Kursk Magnetic Anomaly L.D.Shev Kova

(72) V.N. Yelnikov, .AL.T. Trebukov and E. F. Voskoboy Nikova

(56) Skornov Yu.G. Development systems and complexes of self-propelled machines for underground mining of ores. M: Nedra, 1978, p. 62-66.

USSR author's certificate GF 1234629, cl. E 21 C 41/16. 1984

(54) METHOD FOR REPEATED DEVELOPMENT OF MINE FIELD

(57) The invention relates to the development of ore deposits. The purpose is to reduce

production costs due to a decrease in the volume of drilling and blasting operations and preparatory rifled workings. The method is carried out as follows. The extraction block is formed around four waste chambers within the boundaries passing along the central axes of interchamber pillars. The ore array of pillars is drilled with deep explosive wells. At the first stage of mining, the central part of the excavation block is broken within the boundaries passing through the centers of the spent chambers. After the release of the broken ore, stocks of pillars from the peripheral part of the block are beaten out onto the exposed surface of the spent chambers. Repulsed ore is moved through the exhaust and transport workings of previously spent chambers. 2 Il.

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WITH

The invention relates to the mining industry and can be used in the underground mining of ore deposits.

A known method of excavation of pillars on flat and inclined seams, in which the destruction of a series of pillars is carried out successively along the strike of the reservoir in turns through one.

The disadvantage of this method is the increased volume of preparatory-rifled workings and the increased consumption of explosives.

The closest in technical essence and the achieved result is a method of the collapse of intercameral pillars, according to which first the sections of intercameral pillars are broken along the block boundary adjacent to the ore pass, and then the remaining portions of the intercameral pillars are beaten to the resulting space and form the bulk of broken ore along the transport workings.

The disadvantage of this method is the large volume of preparatory-rifled workings and explosives.

The aim of the invention is to reduce the cost of production by reducing the volume of drilling and blasting operations and preparatory rifled workings.

The goal is achieved by the fact that in a method that involves drilling the ore massif between interchamber pillars by deep explosive wells, plowing up reserves of pillars in two stages into the open space of chambers, producing ore through exhaust workings and delivering the ore, the mine field

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These blocks, which form around the four waste chambers within the boundaries passing along the central axes of interchamber pillars, at the first stage of mining, break down the central part of the extraction block within the boundaries passing through the centers of the spent chambers, and produce ore through the exhaust workings waste chambers, after the ore is released from the central part of the block, stocks of pillars from the peripheral part of the block are blasted onto the exposed surface of the waste chambers.

Figure 1 shows a flow chart of the method; figure 2 - section aa on. 1.

The method is carried out as follows.

During the primary mining of ore deposits, chambers 1 left pillars 2, which must be removed. Re-mining of ore reserves is carried out by excavation blocks that form around the four waste chambers 1 within the boundaries passing along the central axes of the inter-chamber pillars 3. The extraction block consists of the central part 4, outlined by vertical planes 5, passing through the centers of the spent chambers and peripheral b, bounded by vertical planes 3, Transport 7 and final 8 workings were passed earlier during the development of chambers. From the workings of 9 drilling horizon excavation block shoe V

deep wells. First wells of the first stage are charged and exploded, i.e. the central part 4 of the excavation block, and then after the release of the broken ore, the reserves of the pillars from the peripheral part are blown up. In this case, the explosion effect is directed towards the previously spent chambers, which in this case serve as an exposed surface.

Claims (1)

Claim Method A way to re-mine a mine floor, including drilling the ore massif between the chamber pillars by deep explosive wells, blasting the pillars in two stages into the open chamber space, ore production through exhaust workings and delivering the ore, characterized in that, in order to reduce the cost of production by reducing the volume of drilling and blasting operations and preparatory workings, the mine field is worked out by excavation blocks, which are formed from around four spent chambers into gran At the first stage of mining, the central part of the excavation block within the limits passing through the centers of the spent chambers is crushed at the first axes of the inter-chamber pillars, and the ore is discharged through the exhaust workings of the exhausted chambers. breaking down stocks of pillars from the peripheral part of the block to the bare surface of the spent chambers. FIG. t