Preparation method of bed deposits for advance mining at room-and-pillar system

FIELD: mining.

SUBSTANCE: air supplying gate and the main air gate pass along opposite boundaries of mine field so that they run ahead of extraction front through the length equal to distance between axes of the rooms. At that, rooms have the length equal to width of mine field and are located between air supplying gate and ventilation air gate. Fresh air is supplied through the tunnel located in front of extraction front. At that, return ventilation air is removed along auxiliary air gate.

EFFECT: improving concentration of mining operations, reducing volumes of preparatory mine work, and decreasing air leaks through the worked-out area.

1 dwg

 

The invention relates to the mining industry and can be used for mining of bedded deposits, such as potash.

There is a method of coal extraction chamber-and-pillar system, consisting of parallel openings along the strike of the formation, the preparation of the mining of pillars, for ventilation of the extraction field serves fresh air, followed by abstraction of the outgoing jet, excavation field prepare two blocks connected to each other on the flank of Bonami, with a fresh stream of air supplied through the workings of one block, and the outgoing stream divert through the workings of another block, and when the hollow pillar in the block, through the workings of which divert outgoing stream, in production, which produce the hollow pillars, optionally using local ventilation fans fresh air (U.S. Pat. 2229598 RF, MPK7: AS 41/18. 21F 1/00, Appl. 11.07.2003, publ. 27.05.2004).

This method has the following disadvantages: a large amount of mountain preparatory work, ineffective ventilation scheme.

The closest in technical essence and the achieved result to the present invention is a panel method for the preparation of a mine field, including the cutting of several panels with sinking air supply and ventilation panel drifts between which raspolagayut the camera length, the width of the panel. Fresh air is supplied by a vertical air shaft, outgoing stream is removed by vertical ventilation shafts. (Reconstruction of the ventilation network gypsum mine of OJSC "KNAUF Gypsum". / Aehrenthal, Win, Asianin, Laetitiam etc.// horn. Journe. - 2003. No. 3. - P.24-26.)

The disadvantage of this method is the breakdown of a mine field on the panel, which leads to the deconcentration of mining operations, the formation of branched ventilation network, complicating the management of air flows and growth of air leakage, increase the number of preparatory workings and specific volume of mining operations on one tonne of produced reserves necessitates penetration of preparatory workings on the entire length of the panel prior to the beginning of the treatment works, which increases the period of preparation of inventories for mining.

The technical result of the invention is to increase the concentration of mining operations, a significant reduction in the volume of mining and preparation work, as well as in reducing air leakage through the goaf.

This technical result is achieved in that in the method of preparation of bedded deposits to direct the development procedure with chamber-and-pillar system design, including the sinking of air supply and ve is relazioni workings, fresh air in the treatment chamber, removing the outgoing jet air ventilation shafts, air supply and the main ventilation drifts along opposite borders of a mine field ahead of the front cleaning for a length that is a multiple of the distance between the axes of the treatment cells, while treatment chamber are in length equal to the width of a mine field, and have them between the air supply and ventilation drifts, fresh air passes through the tunnel, located ahead of the front of the treatment works, and remove the outgoing stream of air through the auxiliary air passage.

The invention is illustrated by the drawing, which shows a General scheme for the preparation of bedded deposits to direct the development procedure with chamber-and-pillar system development, where 1 is the boundary of a mine field, 2 - air drift, 3 - main vent drift, 4 - auxiliary ventilation drift, 5 - cleaning Luggage, 6 - adit 7 - splitting, 8 - fresh air, 9 - outgoing current of air, 10 - deaf ventilation jumper.

The method is as follows.

For the preparation of a mine field to direct the development procedure along opposite borders of a mine field 1 are preparatory development: the intake passage 2, the main vent 3 and su is magatelli ventilation 4 drifts. Air supply and ventilation drifts knock the treatment chamber 5. Completed preparatory develop ahead of the front of the sewage treatment works, located along the purifying chamber, a length that is a multiple of the distance between the axes of the treatment chambers, due to the fact that cameras are used for transportation of rock mass from the penetration of preparatory workings.

Of the intake passage 2 periodically as the development of mining operations, are shafts 6, knocking them to the surface. The distance between the tunnels is selected based on the maximum possible length of sinking air passage dead-end face. Sinking all the workings are drilling and blasting method. The mining of the reserves of a mine field exercise chamber-and-pillar mining.

Sewage treatment works are as follows.

From the camera in the direction of the array are splitting 7 for a length equal to the distance between the axes of the cameras, and russeck in turn are parts of the next camera. After a gradual connection passable sections to each other is formed next camera. Mining the mineral remains the reference pillars, which are rectangular in plan form.

Fresh air 8 into the mine enters the tunnel 6 and the intake passage 2, which is directed to the treatment chamber 5 and moves along unprocessed mA is Siwa, airing the faces. Outgoing air jet 9 from the camera is displayed on the sub 4, and then the main vent drift 3, from which a shaft is removed to the surface.

For isolation of the outgoing air flow 9 in the transport zboyco, formed by the sinking of the ventilation drifts, construct a deaf ventilation jumper 10. Repulsed minerals of the purifying chamber is transported to the surface through the tunnel 6.

Implementation of the proposed method of preparation consider the example of Kamsko-Ustinsky gypsum deposits.

The method of preparation of a mine field - Plast. The width of the camera is 12 m, length - from 900 to 1400 meters the Width of the pillar depends on the depth of development and is from 8 to 15 m Cameras connected to each other by rasejcami width 11 m, which are passed in the pillars. The host rock steady, all production carried out without fixing the roof.

The refinement of the reservoir are at full capacity drilling and blasting method, with the use of blast hole method. After blasting develop ventilated. Treatment chamber ventilated at the expense of mine depression, stub faces over a length of 10 m is ventilated by local ventilation fans type VME-6.

Ventilation drifts are ahead in relation to the working chamber on the length 66-88 m (two-treck alnoe the distance between the axes of the cameras). Air supply the roadway ahead of the front cleaning work on 352-440 M. Over the same distance, with the development of mining operations, are passed galleries. Annual podvigina front of the sewage treatment works is from 15 to 30 m depending on the length of the chamber and the applied parameters of the system development. The mine is ventilated suction method. Fresh air enters the mine galleries, and the exhaust air is given to the surface through the vertical shaft through the main ventilation unit equipped with a WATERS fan-30. When the ventilation network of the mine next gallery previous excluded from the network by installing a deaf ventilation jumper.

The use of the proposed solution allows to increase the concentration of mining operations, because with the new scheme of training the mining stocks is one front wastewater treatment works, moving across the entire width of a mine field that allows you to put in the same cell with a large number of workers and back faces. If necessary, it also allows you to increase production significantly without additional preparatory workings. Due to the wide scope of work is significantly reduced rate podvigina Stopes and in General the excavation front, which consequently reduces Ude the performance communications the scope of training per tonne of mined reserves.

When implementing the proposed method of preparation of the ventilation scheme minimizes air leakage through the goaf inherent in direct order of testing of the mine field and eliminates the need for construction of a large number of ventilation jumpers, it is reliable for the sustainability of air flow and well-controlled regulation of the distribution.

In addition, there is no need for the construction and operation of air supply vertical shaft, which reduces capital and operating costs (the costs of boring vozduhopodajushchej galleries several times less).

Thus, the use of the proposed solution allows to increase the concentration of mining operations with a significant reduction in the volume of mining and preparation work (as all mine field is prepared only two groups of mines - air supply and ventilation, along the borders of a mine field), and also to reduce air leakage through the goaf.

The method of preparation of bedded deposits to direct the development procedure with chamber-and-pillar system design, including the sinking of air supply and ventilation openings, the flow of fresh air to the treatment chamber, the removal of the outgoing air stream is about a shaft, characterized in that the air supply and the main ventilation drifts along opposite borders of a mine field ahead of the front cleaning for a length that is a multiple of the distance between the axes of the treatment cells, while treatment chamber are in length equal to the width of a mine field, and have them between the air supply and ventilation drifts, fresh air passes through the tunnel, located ahead of the front of the treatment works, and remove the outgoing stream of air through the auxiliary air passage.



 

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