RU2632618C1 - Method for inclined ore bodies mining - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: method for inclined ore bodies includes mining includes a descending order of stopes mining with subsequent collapse of hanging wall rock and construction of ore-rock silmat. Silmat is constructed on the boundary of the upper mined out stope with the underlying one with blasted ore and collapsed rock of the hanging wall by injecting hardening solution into the rock. The hardening solution is placed in wells drilled in the ore mass of lower stope near the boundary with the collapsed rocks of the upper stope. Injection of the hardening solution into the rocks is carried out before mining out the reserves of the lower stope due to blasts of explosive material charges placed in the holes drilled in parallel with solution holes.

EFFECT: invention allows to reduce losses of ore.

3 dwg

Description

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

There is a method of erecting an artificial massif to maintain overlying rocks, including the supply of dry bookmarks and a reinforcing solution to the worked-out space [1].

The disadvantage of this method is the need for separate supply of dry bookmarks and strengthening solution and mixing them to form an artificial array.

The closest in technical essence is the method of developing inclined ore bodies using malleable pillars between floors [2] to prevent the penetration of upstream collapsed rocks into the mined chamber.

The disadvantage of this method is that the reserves of the pliable pillar are lost in whole or in part, in addition, for mining or partial extraction of the reserves of the pillar it is necessary to conduct additional mine workings, increasing the cost of production.

The purpose of the invention is the reduction of losses due to the exclusion of ore pillars.

The technical result of the invention is to reduce ore losses in the bowels by eliminating ore pillars.

The technical result is achieved by the fact that the artificial massif is formed at the boundary of the spent chamber with the underlying chamber from the beaten ore and the collapsed rocks of the hanging side by injection of these rocks with a reinforcing solution, and the reinforcing solution is placed in wells drilled in the ore mass of the lower chamber near the boundary with the collapsed rocks of the upper chamber, and the injection of a reinforcing solution into the rocks is carried out before mining the reserves of the lower chamber due to the explosion of explosive charges placed in the wells, drilled parallel to the wells with the solution. The implementation of the method is illustrated in FIG. 1, 2 and 3.

In FIG. 1, 2 and 3 show a top-down order of mining ore bodies from top to bottom. In FIG. 1 shows a vertical cross-section through the strike of the ore body with the spent upper chamber, and the contour of the underlying chamber. Shown are the wells drilled in the ore mass of the underlying chamber at the boundary with the upper spent chamber to accommodate the reinforcing solution and explosive. In FIG. Figure 2 shows these wells in horizontal section (section AA). In FIG. Figure 3 shows a vertical cross-section through the strike of an artificial ore-rock pillar.

The development method is as follows.

The mining of chamber reserves is carried out from top to bottom by open chambers 1 under an artificial ore-rock whole 2, formed from collapsed rocks 3 of the previously worked out upper chamber 4 and beaten off during crust injection. Simultaneously with the preparation of the lower chamber 1 for production, from the development 5, wells 6 are drilled to accommodate the strengthening solution and wells 7 for explosives. Wells 6 and 7 are drilled at a minimum distance (not more than 1 m) from the border 8 of the overlying spent chamber 4. Injection of the binder into the collapsed rock 3 of the chamber 4 is carried out by the force of the explosion before cleaning in the lower practiced chamber 1.

The release of pure ore in the chamber 1 is carried out after the setting of the solution and the formation of an artificial ore-rock pillar 2, which prevents the infiltration of collapsed rocks 3 of the spent chamber 4.

Information sources

1. AC 1191607 USSR, IPC E21F 15/00. The method of erecting an artificial array / Antipin Yu.G., Volkov Yu.V., Berkovich V.Kh., Barashkin A.P. 1985.

2. AC 1293340 USSR, IPC E21C 41/06. Malleable supporting pillar / Balek A.E., Zubkov A.V. 1985.

Claims (1)

A method for developing inclined ore bodies, including a descending order of excavation by chambers followed by collapse of the rocks of the hanging side and the formation of an ore-rock artificial massif, characterized in that the artificial massif is formed at the boundary of the upper spent chamber with the underlying chamber from the broken ore and collapsed rocks of the hanging side by injection of these rocks with a hardening solution, and the hardening solution is placed in wells drilled in the ore mass of the lower chamber near the boundary with collapsed rocks the chamber, and the injection of the reinforcing solution into the rocks is carried out before the reserves of the lower chamber are exhausted due to the explosion of explosive charges placed in wells drilled parallel to the wells with the solution.

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