RU1786267C - Method for mining steeply inclined ore veins - Google Patents

Abstract

The invention relates to underground mining of steeply dipping cores, partially located in the marginal area of an underground natural cavity. The goal is to increase ore bypass productivity and reduce dilution when developing a core of a valuable mineral, partially located in the marginal zone of a natural underground cavity. The development of steeply dipping veins of a valuable mineral is carried out by floors. The lower floor is formed in the area of the natural cavity. An ore pillar is formed between the sub-floors. Intermediate field work takes place in the hanging side of the core above the natural cavity. The ore stored in the upper sub-floor is transferred to the cavity of the lower sub-floor and the reserves of the lower sub-floor are depleted in a descending order with selective extraction of the mineral and its subsequent mechanized descent to the return horizon. Quenching of the ore pillar is done after the extraction of the valuable mineral. 1 s.p. f-ly, 3 ill. ate with

Description

The invention relates to the mining industry and can be used in underground mining of steeply dipping veins of a valuable mineral, partially located in the marginal zone of an underground natural cavity.

There is a method of developing steeply dwindled veins with an ore storage system by a treatment unit, divided by an intermediate drift into lower and upper floors, in which the generalized ore is produced simultaneously from both subfloors with the gradual, as the ore is released, maturity of the intermediate drift is repaid from one flank rising to another.

The disadvantage of this method is the low productivity of ore bypass from the upper to the lower floor. In addition, the combination of the delivery of ore and mineral leads to its significant dilution.

The closest in technical essence and the achieved effect is a method of developing steeply falling ore veins, including sinking of flank rebels, breaking and ore storing in a block divided into sub-floors by the whole ore, drilling and blasting of the latter from one block flank to another with the simultaneous release of staged ore of the upper sub-floor into the treatment space of the lower sub-floor and the general outlet of the mined ore, in which in the lying side parallel to the ore pillar and at the same level t rohod field production intermediate, from Koch with

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by producing drillings of the specified pillar, breaking the latter with under-supply of wells, the intermediate field production being communicated with the treatment space of the upper sub-floor and the ore separation compartments of the flank rebels.

The disadvantages of this method are significant dilution and the inability to maintain the conditioning qualities of the mineral during its gravity delivery to the haulage horizon. In addition, the placement of a field mine in the lying side of a vein at angles of its fall in the range of 50-60 ° leads to a significant increase in the length of the mine slopes. A decrease in their length under the indicated conditions entails a decrease in the slope angle of the slopes, and, consequently, a decrease in the productivity of ore bypass from the upper sub-floor to the treatment space of the lower sub-floor.

The purpose of the invention is to increase the productivity of ore bypass, reduce dilution and maintain the conditioning qualities of the mineral.

This goal is achieved in that in a method for developing steeply dipping ore veins, including sinking of flank uprising and retreating mines, mining a block by sub-floors with the formation of a temporary ore pillar between the sub-floors, conducting a field intermediate mining parallel to the ore pillar, intermittent mining of the mine with a treatment space of the upper sub-floor, breaking stocks from bottom to top in the upper sub-floor, breakdown of ore reserves in the lower sub-floor, storing of broken ore in sub-floors, general release uds from the block, transferring the beaten ore from the upper sub-floor to the lower and extinguishing the ore pillar, in the lower sub-floor including the natural cavity, the intermediate field working out passes in the hanging side of the vein above the cavity, the slopes pass into the indicated cavity from the central part of the intermediate field working out and fill it with the upper sub-floor ore until disruptions that occur entirely under the ore between the flank rebels, then, in the descending order, the reserves of the lower sub-floor are developed with selective extraction of the valuable mineral delivering it to the passageway, wherein the transportation of the mineral RECOVER carried out in mechanized transport vessels descent and redemption ore pillar is produced out after completion of the recesses valuable mineral.

The placement of the intermediate mine from the side of the hanging side, unlike the prototype, allows you to reduce the length of the mine workings - ramps and increase the angle

their inclination, which in turn makes it possible to increase the productivity of ore bypass.

Ore ore is partially discharged through the bottom as the lower sub-floor is broken

0 block, and the valuable mineral is delivered to the recovery mine along the flank uprising, the ore compartment of which is equipped with a mechanized (e.g. skip) descent, which ensures the preservation of the valuable mineral from destruction during delivery, and therefore its conditional qualities.

Comparison of this solution with the prototype and other technical solutions in

0 in this area, it was not possible to identify features similar to those of the claimed decision; therefore, we can conclude that it meets the criterion of significant differences.

5 in FIG. 1 shows a block during the completion of the upper sub-floor and the filling of the natural cavity included in the lower floor in the ore mined therein; in FIG. 2 is a section AA in FIG. 1; in FIG.

0 3 - block during the period of breaking off the stocks of the lower sub-floor.

Initially, preparatory work is carried out, which begins with a haul drift 1, flanking

5 risers2 IZ, intermediate field drift 4. Cutting operations consist in designing the bottoms of the sub-floors and blasting methods in the central part of the intermediate mine 4 mining-ramps - slopes 5, the number of which and the orientation determine the outcome from the dimensions of the natural cavity 6. Ore breaking begins from the upper sub-floor in ascending order. In conjunction with the process of bypassing the stained ore 7 of the upper sub-floor through the ramps 5 into the cavity 6 of the lower sub-floor in the upper part of the latter, flank rebels 2 and 3 failures 8

0 providing access to the treatment area and its effective ventilation. The cavity 6 is filled with stained ore 7 to the soil level of faults 8, after which the ore bypass is stopped and

5 begin to break down in a descending order of stocks of the lower sub-floor. The extraction of each subsequent layer in the marginal zone of a valuable mineral is carried out using one of the known methods (for example, using low-explosive explosives or LDCs) after breaking and partial discharge to the height of the beaten-out ore ore 9 through the outlet openings 10 of the bottom floor. The mineral is delivered to the flank uprising 3 by, for example, a scraper 11, which is unloaded into a transport vessel (for example, skip) 12 of a mechanized descent equipped in the ore compartment of the uprising 3 for subsequent delivery of the mineral to the haul-off drift 1. As the cleaning operations develop on the lower sub-floor, the mined-out space is secured with a portable safety support 13, and the ore pillar 14 is repaid by blast holes with an under-charge from the intermediate drift 4 after completion of strippers of the lower sub-floor.

Using the proposed method when mining a valuable mineral, partially located in the marginal zone of the underground natural cavity, will provide the following advantages compared to known methods:

1. An increase in the productivity of bypassing the gas-filled ore of the upper sub-floor to the treatment space of the lower sub-floor.

2. Reduced dilution of a valuable mineral.

3. Preservation of the conditioning qualities of a valuable mineral.

Claims (2)

SUMMARY OF THE INVENTION 1. A method for developing steeply dipping ore veins, including sinking in a block of flank rebellion and recoil mine workings, mining a block by sub-floors with form 5 0 5 0 5 the development of a temporary ore pillar between floors, conducting a field intermediate mine parallel to the ore pillar, intermittent mining with a treatment space of the upper sub-floor, breaking ore reserves from the bottom up in the upper sub-floor, breaking the ore reserves in the lower sub-floor, the magnetization of the broken ore in the sub-floors, general ore output unit, bypassing the beaten ore from the upper sub-floor to the lower and redeeming the ore pillar, characterized in that, in order to increase the productivity of ore bypass and reduce during the development of a vein of a valuable mineral, partially located in the marginal zone of a natural underground cavity, an intermediate field development takes place on the side of the vein above the natural cavity, slopes pass into the specified cavity from the central part of the intermediate excavation and fill it with ore of the upper sub-floor until disruption that pass entirely under the ore between the flank uprising, then in a descending order the development of the bottom sub-floor reserves with the selective extraction of the valuable mineral and its delivery about the backhaul of the flank uprising, and the redemption of the ore pillar is carried out after the extraction of valuable mineral. 2. A method according to claim 1, characterized in that, in order to preserve the conditioning qualities of the valuable mineral during delivery, it is transported in an uprising mode in transport vessels of mechanized descent. 5 ; -i f ,: $.