SU842196A1 - Method of mining sloping ore bodies - Google Patents

Description

(54) METHOD FOR DEVELOPING POWERFUL HEALTHY FALLING ORE BODIES

The invention relates to the mining industry and can be used in the development of high-power steep ore bodies with concrete-laying systems. .

There is a known method of developing steeply dipping ore deposits with a chamber system with a tab in which the shape of the bottom of the chambers is similar to the specular reflection of the roof, and the measures of the underlying horizon are offset relative to the chambers of the upper horizon along half the width of the chamber jTl. during the mining of chamber stocks, which contributes to their collapse into ore, reducing the quality indicator of ore extraction from the depths, and the crushed rock does not allow to lay the lower part of the chambers with a concrete bookmark, which leads to an additional dilution of the broken ore when excavating the underlying chambers.

There is also known a method for developing powerful steeply dipping ore bodies, which includes breaking down the ore body from top to bottom using rhomboidal blocks.

the forms, their arrangement across the strike with the displacement of adjacent blocks half the height of the floor, laying of the dug-out block space with concrete and placing the upper half of the blocks between adjacent blocks laid and the lower half in the ore massif 2. Disadvantages of this method; is a relatively large loss at the bottom and the dilution of broken ore from the collapse of the host rocks. The purpose of the invention is to reduce

dilution of ore from collapse.

enclosing rocks and ore losses at the bottom.

The goal is achieved by the fact that the block is divided into two chambers, while first the upper part of the block is worked out under the concrete vault with a truss-shaped chamber, and after laying the last one, the lower part of the block is worked out with a rhomboidal chamber, similar to the shape of the produced block. Figure 1 shows a scheme for implementing the method, a cut along the strike of the ore body; figure 2 - section aa in figure 1.

The ore body across the strike is worked out with rhomboidal blocks with their displacement relative to each other by half the height of the floor, the floor is prepared with the main traffic drift 1, slope 2, sublevel traffic drifts 3, ore slips 4 and a filling tunnel 5 by rock.

In order to work out the upper part of the block from the drift 3 of the upper substage, the transport unit b and loading races 7 go to the border of the adjacent blocks displaced in height, where they divide the receiving niches 8. Simultaneously with the ort b, the lower chambers of the upper unit are manufactured tamping up the upper part of the rhomboidal block trenches. After the chamber has been fully prepared for excavation, the fans of the wells are layered off and ore is released through the niches to the delivery horizon. The spent upper part of the block is laid with concrete through the main horizon of the upper floor. The lower part of the block is drilled from the transport unit b of the upper substage and discharged through the narrowed lower part of the rhomboidal block to the horizon of haulage, where, by loading and hauling machines, through the loading runs 7, the ore is delivered to the loading point in the wagons. The empty chambers are filled with concrete from the orts, passed from the stowing gate 5 to the top of the rhomboidal chamber of the block. The development of cameras lead in the sequence indicated in figure 1 in ROMAN digits.

The application of the proposed method in the mining industry makes it possible to reduce the dilution of the ore from the collapse of the host rocks and the loss of broken ore on the bottom.

Claims (2)

1. USSR author's certificate No. 153893, cl. E 21 C 41/06, 1962. 2. USSR author's certificate number 134242, cl. E 21 C 41/06, 1970 (prototype).