SU1167331A1 - Method of working ore bodies - Google Patents

Description

The invention relates to the mining industry, and in particular to methods of developing ore deposits.

The purpose of the invention is to reduce losses 5 and dilution of ore.

FIG. 1 shows the position after ore blasting on the upper levels and releasing it through the ends of the drill and

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Delivering the work, while after the ore is released, an open funnel forms at the end of the lower delivery development (first mining cycle), at the firm. 2 - the position after the ore layer has been crushed in the ceiling by an $ 1 open funnel at the end of the delivery development and the release of ore before the formation of a new open funnel (second mining cycle); FIG. 3 position after ore blasting in the pre-production and its release with the formation at the end of the release of an open funnel (the third mining cycle), on which the ore of the upper sub-floors is beaten; FIG. 4 shows the assembly at the end of the lower delivery development and the size of the flow area in the exhaust funnel.

The method is as follows. thirty

The preparation of the block is carried out by war 1 and 2 high workings. Ore boreholes 3 beat off ahead of the upper sub-floors on the podkonsolnoe space 4, bounded on one side of the collapsed rocks 5, located at an angle of repose.

The ore repulsed on the upper sub-floors is released from the butt of the subsurface 40

2 workings and from the end of the delivery 1 workings of the lower substage. In this case, the bulk of the ore is extracted “clean” from the sub-console space without mixing the enclosing rocks of 45. After the ore has been repulsed on the upper levels, from the end of the delivery 1 production, the layer 6 of the ceiling 7 is repaired on the funnel 8 formed at the output of the previously 50 battered ore from the end of the delivery making 1, and the ore beaten in the ceiling is released until an empty funnel 8 is formed in the end of the delivery making 1. Then 55

exhausting the blasting of layer 9 at the end of delivery making 1 and releasing ore again until an empty funnel 8 is formed. Subsequently, the blasting cycle is repeated.

After each ore blasting cycle, when it is released at the end of the delivery development, an open funnel 8 is formed, the width of which is defined at the roof level of the delivery development! · Depth G of hand pick-up and the permeability ρ of broken ore pieces through the funnel neck at release, i.e.

where a = (3-5) “P is the condition of the patency of broken ore pieces with their average diameter equal to D.

To create an open funnel 8 with each blasting cycle, the thickness of the pledged layer 9 from delivery clearance 1 is equal to the width of the output funnel 8 at the roof level of delivery clearance.

To increase the completeness of ore extraction, the ceiling 7 is brought down by layers 6, the volume of which is less than or equal to the volume of the crater 8 formed when the ore is released at the butt end of the mine workout 1. Under this condition, the ore broken off in the ceiling 7 is produced from the funnel 8 without mixing the crushed rocks 5.

For a uniform and adjustable movement of the slope of the collapsed rocks 5 along the front of mining, the thickness of the beating layer 6 in the ceiling 7 is taken to be equal to the thickness of the beating layer 9 of the delivery output 1. In addition, the ceiling 7 is collapsed with a lag from the maturity of the rear sight above the delivery output 1 by the amount,

When these conditions are met, the broken ore moves along the slope of the rocks 5 and is produced without mixing them.

The use of the invention allows to increase the efficiency of systems for the development of ore deposits with the collapse of ore and host rocks.

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Claims (1)

METHOD OF WORKING ORE BODIES, including layered ore blasting into podconsole space, ahead of ore blasting from drilling workings on the upper subfloors, face ore production from the podsanny space to the delivery output of the lower substage through a funnel, bounded on one side by collapsed rocks under the corner of an empty corner, an outlet subsoil through a cradle, which is bounded on one side by collapsed rocks under the corner of an empty substructure, under the corner of an earthen mound on the other hand, with ore as a whole, and the collapse of the ceiling, characterized in that, in order to reduce the loss and dilution of the ore, above the production output, the pillar is formed, after blasting and ypuska ore from the ore podkonsolnogo space collapse potolochiny performed alternately maturing pillar above the delivery generation, the breaking of the ore to produce poto'lchiny settling by the amount Hb where N is the height of the block, m; 6 - height of delivery development, m * ,. β - angle of repose of rocks, hail; B is the thickness of the layers being fought off; Μζ at the same time, the layer-breaking of ore in the ceiling and the pillar is produced in layers of equal thickness equal to the width of the outlet funnel and determined from the expression where T is the depth of the ore intake at the end of the mine, m { about - the size of the flow area in the end of the workout at the release of ore, m, and the release of ore after the breaking of each layer in the ceiling and the pillar lead to the formation of an open funnel, while the ceiling is brought down by layers whose volume is less than or equal to the volume of the open funnel. δ and „„ 1167331 1 167331