RU2481473C1 - Method for layered development of kimberlitic pipe with backfilling - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: each layer is developed with the use of utilised vehicle tyres as a support, note that the layer height is taken not more than tyre height or divisible by its other sizes. Backfilling material is supplied to developed space with mounted tyres. The support from utilised tyres is used as shuttering at backfilling material supply. Note that the tyres are mounted close to each other and isolated from backfilling space by material capable to drain water.

EFFECT: increase of speed of layer development, increase of work performance safety, extension of method capabilities.

2 cl, 3 dwg

Description

The invention relates to mining and can be used in the development of steeply falling ore bodies, for example kimberlite pipes, underground method with filling the worked out space with filling material.

A known method of mining a kimberlite pipe in ascending order and dry bookmark (RF patent No. 2132461, publ. 1999.06.27, E21C 41/22). In the upper part of the worked-out space of the block, an artificial bottom is made for working out the overlying block in the form of delivery scaffolds and ore chambers, which are temporarily filled with inert materials, and the gaps between the frames are filled with a hardening tab. The removal of inert materials from the frames is carried out during the design of the bottom for processing the block in the upper floor. Ore breaking in the block is carried out simultaneously from all wells to a limited compensation space to ensure that the block is completely filled with broken ore. The release of broken ore is carried out by the simultaneous dosed inclusion of all vibratory feeders in the unit into operation, while the empty treatment space is filled with a dry bookmark.

The disadvantage of this method is the high complexity of the work associated with the large volume of penetration and construction of mine workings.

A known method of layer mining of a kimberlite pipe in ascending order with a bookmark (RF patent No. 2186981, publ. 2002.08.10, E21C 41/22). The method includes excavation of the ore by layered cuts, sinking of the backfill and ventilation openings, excavation of the ore in layered cuts, delivery of the ore in the layer and carrying out filling operations in layered cuts. In the next layer, there is a split drift and filling and ventilation drifts at the border of the panel, from the split drift at an acute angle to its long axis, the combine excavates ore in layered cuts at an angle of 2-15 ° to the horizon to the filling and ventilation drift, and the mined ore is delivered to a split drift and a split drift to ore launch by conveyors. When the combine moves to the next layer cutting in the spent layer cutting, laying is carried out, for this purpose filling materials in the form of crushed rock of a certain particle size distribution are conveyed from the bypass riser by conveyors and part of the volume of the layer cutting is filled with crushed rock, while vibrating laying her to the maximum possible degree of styling. Then, the above pores are injected into the remaining pores of the solidified solidification mortar array, after which the above operations are repeated until the layer cut is filled with a bookmark in the form of crushed rock with pores filled with the solidifying solution. After excavating the ore from all layer dispersions of the panel and filling them with a bookmark, the ore is mined by the combine from the pillars between the laid layer cuts, after which the worked out volume of the pillars is also filled with crushed rock, followed by injection of the hardening solution into it with the technological operations used to fill the layer dispersions. After working out the layer, the split and filling-ventilation drifts are filled with crushed rock using it to transport the conveyors installed in them, and the crushed rock is laid and the hardening mortar is injected into it by technological operations that are used to fill the layer cross-sections. Above the filling bookmark with a split and filling-ventilation drifts, the combine runs a cutting and filling-ventilation drifts for excavating a new layer with the delivery of ore mined along the conveyors used in mining the previous layer. After driving the indicated drifts of the layer, the conveyors are reassembled by lifting and securing them to the roof of these passed drifts to work out a new layer.

The disadvantage of this method is the high complexity of the extraction of ore in layered cuts, as well as the high material and labor costs associated with the operations of injection of dry bookmarks.

There is a method of layer mining of a kimberlite pipe in ascending order with a bookmark adopted as a prototype (RF patent No. 2309253, publ. 10/27/2007, E21C 41/22). The method includes sinking ventilation, haul-off, split drifts, ventilation and backfill rebellion, ore passing, ore excavation in layered cuts, ore delivery in a layer, filling operations in layered cuts. Before the beginning of the layer excavation of the floor, reinforced concrete floors are erected in the upper and lower parts of the floor, repeating the shape of the horizontal section of the kimberlite pipe, resting them on the rock containing the kimberlite pipe. Before laying each layer cut, it is insulated along the perimeter and length with a flexible overlap, fixed on the sides of the cut into the roof and the working soil along its length with anchor support. After laying the cut, excavation of ore is carried out in the adjacent cut. As a flexible overlap, you can use a metal mesh-netting, a polymer mesh or tarpaulin.

The disadvantage of this method is the high complexity of the extraction of ore in the cuts and the low speed of mining reserves of the layer due to the large volume of operations for laying each cut.

The technical result of the invention is to increase the speed of mining reserves of the layer, improving the safety of work, expanding the capabilities of the method.

The technical result is achieved by the fact that in the method of layered mining of a kimberlite pipe with a bookmark, including sinking of ventilation, recoil, split drifts, ventilation and stowing insurrections, ore passing, lay excavation and ore delivery, installation of lining in the worked out space, stowing operations, according to the invention, each layer work out using used car tires as a support, moreover, the layer height is taken no more than the height of the tire or a multiple of its other sizes, filling mat rial is fed into the waste space defined tire, the lining of the waste tires are used as formwork when applying packing material, for which waste tires mounted close to each other and insulated from the pictures pledged space capable of drain water.

Niches can be passed on each layer to install the used car tires in a vertical position.

The method of layering a kimberlite pipe with a tab is illustrated by diagrams: Fig. 1 shows a vertical section of a kimberlite pipe along line A-A, Fig. 2 shows a horizontal section of a pipe along line B-B, Fig. 3 shows a vertical section of a kimberlite pipe along line CC, where:

1 - kimberlite pipe;

2 - filling array of waste layers;

3 - split drift;

4 - used car tires;

5 - recoil drift;

6 - ventilation drift;

7 - layer at different stages of the treatment recess (drilling, delivery, laying);

8 - stowing uprising;

9 - ventilation uprising;

10 - motor vehicle;

11 - ore passing;

h _et - floor height.

The method of layering a kimberlite pipe with a bookmark is as follows. Spend ring haulage 5 and ventilation 6 drifts. The vertical distance between them is limited by the floor height h _et . They are connected by a motor vehicle 10, ore pass 11, filling 8 and ventilation 9 uprising. Auto-passage 10 is necessary for access of self-propelled equipment, for example, a self-propelled drilling rig, handling equipment, an anchor installer, etc. to each layer. The ore is excavated in sections 7 after a layered drift 3 has been drilled, which serves as a transport excavation in each layer from the motor vehicle 10 (Figs. 1-3 show the various stages of the extraction excavation when using blasting for ore mining). The use of lining 4 of used car tires will allow for a united front in the lava. At the same time, the lining 4 of the used automobile tires will allow to effectively work out the reserves of the layer, because possesses a number of positive properties. For example, when the load increases, the lining 4 of the used car tires increases its area and eliminates the point load on the ore and filling masses. The installation step of supporting 4 of spent automobile tires along the longitudinal and transverse axis of the ore body is determined based on rock pressure and the possibility of effective and safe operation of self-propelled equipment in the layer, as well as the height of the tires 4 in the air-filled state. To install the used car tires 4 in a vertical position on each layer, you can pass niches with dimensions that allow this operation. As a support from used car tires 4 at elevated mountain pressure, you can use car tires with disks filled with compressed air. Before filing the filling material, the support 4 of the used car tires can be connected with each other by flexible or rigid ties in order to create a three-dimensional structure to increase the bearing capacity of the layer of filling material.

The height of the layer is taken no more than the height of the lining 4 of the used car tires or a multiple of other sizes of the tire 4 (for example, its width when laying the lining 4 horizontally). You should also consider the increase in the linear dimensions of the lining 4 of the used car tires when filling them with air to working pressure. Ore is delivered to the ore pass 11. After the complete extraction of ore reserves 1 in the spent layer, consisting of sections 7, the lining 4 from the used car tires is left in the layer and filling material, for example, a hardening tab, is fed into the resulting space. After a set of sufficient strength of the backfill array, the next layer is recessed. In this case, a filling array 2 of the worked out and embedded layers is obtained. To ventilate the floor, fresh air is supplied through a ventilation uprising 9, which passes through a split drift 3, with the help of local ventilation fans (not shown conventionally in the drawings), they are supplied to sections 7, after which they are diverted through a filling uprising 8. Support 4 from used car tires is used as a formwork when filing filling material. To do this, it is installed close to each other and isolated from the laid space with a material capable of draining water, such as burlap.

The use of the method of layered mining of a kimberlite pipe with a bookmark provides the following advantages:

- reducing the complexity of the method;

- increase the speed of development of the layer;

- the possibility of recycling used car tires;

- improving the safety of work.

Claims (2)

1. The method of layered mining of a kimberlite pipe with a bookmark, including the sinking of a ventilation, recoil, split drifts, ventilation and stowing insurrections, ore discharge, layer excavation and ore delivery, installation of lining in the worked out space, laying work, characterized in that each layer is worked out using as a support for used car tires, and the layer height is taken no more than the height of the tire or a multiple of its other sizes, the filling material is fed into the waste space with tanovlenii tires, the lining of the waste tires are used as formwork when applying packing material, for which waste tires mounted close to each other and insulated from the pictures pledged space capable of drain water. 2. The method according to claim 1, characterized in that for the installation of spent car tires in a vertical position on each layer pass niches.

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