RU2453702C1 - Method for dust and gas removal from stope ore - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method consists in clean air supply into the bottom hole and removal of contaminated air from the bottomhole zone. In this respect, the configurations of circulating air swirling motion are built up. For this purpose, the worn chambers are broken into the airway. In this respect, the additional draft source, mounted in the worn chamber, is aligned for work in direction to the airway, and the mix of fresh air with the airflow contaminated with dust and gas is removed through the worn chamber and airway. In this respect, fresh air is directed to workable stope ore through the haulage roadway or by means of additionally installed ventilation draft source with air feeder, which end is placed in the working chamber, or by means of the adjusting airway stoppings, one of which is mounted on the haulage roadway on the way of air current motion between the working and worn chambers, and the other one is mounted at the mouth of worn chamber, placed in axial alignment with developed stope ore, which is gone away from it through the haulage roadway.

EFFECT: gain in air supply performance.

6 cl, 2 dwg

Description

The invention relates to the mining industry and can be used to ventilate treatment, mainly deadlock, mine workings.

There is a method of natural ventilation of a long deadlock mining due to the circulation vortex movement (Krasnoshtein A.E., Faynburg G.Z. Diffusion network methods for calculating the ventilation of mines and mines. / Ekaterinburg, 1992, chap. 7, §7.1, p. 148-164, Fig. 7.8).

The disadvantage of this method is the insufficient intensification of ventilation along the entire length of the dead-end production.

Closest to the proposed invention is a method of removing dust and gas from a treatment mine with a chamber-pillar mining system, comprising supplying clean air to the bottomhole zone with a traction source that creates a vortex circulation circuit, on one side of which there is a supply of clean air, and on the other side removal of contaminated air from the bottom-hole zone, and a source of thrust is placed in the bottom-hole zone, which creates the first circuit of the vortex circulation movement and forms a directed flow air contaminated by dust and gas along the wall of the mine working opposite to the miners' workplaces, while at the junction of the first circulation vortex circuit with the next vortex circuit there is a malfunction connecting the treatment mine with the exhaust chamber, where an additional traction source oriented to work in direction to the ventilation drift and which can be equipped with an air duct (patent No. 2392440 of the Russian Federation, publ. 06/20/2010, bull. No. 17).

The disadvantage of the method of removing dust and gas from the treatment plant is the low efficiency of air flow control in the case in which the exhaust chambers are knocked down with ventilation drifts block (BWS) or panel (PBS) with the appropriate training system.

The technical result of the invention is to increase the efficiency of ventilation by removing the accumulation of dust and gas from the sewage treatment plant, in which people work, and eliminating air leakage through the exhaust chambers, when they fail with ventilation workings.

The specified technical result is achieved by the fact that in the method of removing dust and gas from the treatment mine, which includes supplying clean air to the bottomhole zone with a traction source, creating a vortex circulation circuit, on one side of which pure air is supplied, and on the other side is the removal of contaminated air from the bottom-hole zone, in which the traction source is placed, which creates the first circuit of the vortex circulation, and a directed air flow is formed, contaminated by dust and gas, along the mountain wall workings opposite to the miners' workplaces, at the same time, at the junction of the first circulation vortex circuit with the next vortex circuit, there is a malfunction connecting the treatment mine with the exhaust chamber, where an additional draft source with an air duct is installed, the exhaust chambers are knocked down with a ventilation drift, with an additional draft source installed in the exhaust chamber, oriented to work towards the ventilation drift, and a mixture of fresh air with a stream of air polluted dust and gas are removed through the exhaust chamber and the ventilation drift, while fresh air is sent to the working treatment plant through the transport drift or by means of an additionally installed source of ventilation draft with an air duct, the end of which is located in the working chamber, or by means of regulating ventilation jumpers, one of which is installed on the transport drift along the path of the air flow between the working and spent chambers, and the other is installed at the mouth of the spent chamber, located hydrochloric coaxially fulfills a cleaning formulation that is separated from it through the transport drift.

The ventilation drift is formed as the treatment work moves forward with a diagonal fault from the sewage treatment plant through the exhaust chamber to the design loop of the ventilation drift with through ventilation, with the subsequent formation of a ventilation drift until the next sewage treatment run. A directed air flow is formed with dust and gases by the inclusion of an additional source of ventilation draft located in the exhaust chamber. A directional stream of a mixture of fresh air with an air stream contaminated with dust and gases is formed, including an additional source of ventilation draft located in the gap between the treatment outlet and the exhaust chamber and oriented to work towards the ventilation drift. Additional sources of traction are provided with an air duct. In the fault between the waste chambers, as well as in the spent chamber adjacent to the treatment workout, ventilation jumpers are installed in the area between its interfaces with the transport drift and the fault between the treatment workout.

The essence of the invention is illustrated by drawings, where in Fig. 1 is a diagram of aeration of a mine working (bottomhole zone of a dead end mine), Fig. 2 is a diagram of aeration of a mine in case of mines between the mines with the formation of a ventilation drift.

In the figures indicated: 1 - transport drift; 2 - fresh air; 3 - a mixture of streams of fresh and polluted air; 4 - miners jobs; 5 - failure; 6 - directional air flow with dust and gas (primary circuit); 7 - self-propelled wagon; 8 - hopper reloader; 9 - combine; 10 - source of traction; 11 - sewage treatment (dead end production); 12 - waste chamber (through production); 13 - an additional source of traction; 14 - duct; 15 - ventilation drift; 16 - source of ventilation draft with air duct; 17 - control ventilation jumpers, 18 - ventilation jumpers.

The method is as follows.

Fresh air 2 enters from the mouth of the treatment plant 11 to malfunction 5 either as a result of a shaft depression created by the main ventilation fan and due to regulating ventilation jumpers 17, or due to an additional traction source equipped with air duct 16, or through a combined combination of regulating ventilation jumpers 17, an additional source of draft provided with an air duct 16, and a shaft depression created by the main fan unit.

The elimination of a possible leakage of fresh air 2 through the transport drift 1 is achieved either by installing a source of ventilation draft with an air duct 16, for example, a local ventilation fan (VMP) with an air duct, or by means of regulating ventilation jumpers 17 that overlap the cross-section of the transport drift 1 and the exhaust chamber opposite to the treatment plant. To do this, one of the jumpers is installed on the transport drift 1 along the path of the air flow between the treatment plant 11 and the spent chambers and can have a passage for people and vehicles (for example, a door), and the other at the mouth of the spent chamber located coaxially to the treatment mine , distant from it through a transport drift. Thus, the flow of fresh air 2 is completely sent to the treatment plant 11, bypassing the place of its leak.

It is possible to avoid air leakage by also combining the combined use of control jumpers 17 and a local ventilation fan (HFM) with air duct 16.

In the area of the fault 5, part of the fresh air goes through the workplaces of the miners 4 to the face, from where the directed air flow with dust and gas 6 is carried out with the help of the draft source 10 and the first circulating vortex circuit is formed. Another part of the fresh air 2 together with the directed air flow contaminated by dust and gas 6 enters the fault 5 between the treatment plant 11 and the exhaust chamber 12. In the fault 5, fresh air 2 is mixed with the polluted flow 6 and diluted to sanitary standards with the content hazardous components below established standards in the general mixture 3.

The use of an auxiliary thrust source 13 allows to increase the efficiency of air exchange control in a fault 5 between the treatment facility 11 and the spent chamber 12.

In the case when the treatment workings 11 straight out of line with the ventilation drift 15 (Fig. 1), an additional draft source 13, which can be equipped with an air duct 14, is installed in the exhaust chamber 12, is oriented to work towards the ventilation workout and intensifies the removal through the fault 5 a mixture of streams of air contaminated with dust and gas 6, and fresh air 2, through the exhaust chamber 12 or through the duct 14 and further along the ventilation openings to the ventilation shaft.

If the ventilation drift 15 is formed by knocking down the treatment workings 11, as the treatment work moves diagonally at the end of the run from the treatment work through the spent chamber to the design loop of the ventilation drift (Fig. 2), then an additional draft source 13 can be located in the spent chamber 12 and during operation, orient yourself either in the direction of the ventilation drift (it can be equipped with an air duct), and in the area of the malfunction between the exhaust chambers 5 ventilation bridges 18 are installed, which There is a possibility of recirculation of the air flow in the exhaust chambers 12, or an additional thrust source 13 (which can also be equipped with an air duct) is installed in a fault 5 and oriented to work in the direction from the treatment outlet 11 towards the adjacent spent chamber 12, in this case, the jumpers 18 are not are needed, or an additional source of traction 13 without an air duct is placed in a fault 5 between the treatment mine 11 and the spent chamber 12 and oriented to work in the direction from the treatment mine 11 to the spent chambers 12 the control ventilation jumpers 17 are installed. Thus, if the fan 13 is equipped with an air duct 14, then the ventilation jumpers 18 are not needed between the exhaust chambers 12 and the exhaust chamber 12 itself, and if there is no air duct 14, then adjustable ventilation jumpers 17 are needed (Fig. 2).

Next, the mixture of air flows 3 follows the ventilation openings to the ventilation shaft.

After driving through the diagonal disruptions and ensuring through ventilation, a ventilation drift is formed to the design circuit of the next treatment output.

Aerodynamic parameters of the operation of traction sources (VMP) 10, 13 and 16 with an air duct are calculated depending on mining and technical conditions, gas content of the strata and used mining equipment. The auxiliary source of thrust 13 is located in the spent chamber 12 or in fault 5 in a technologically convenient place, and it can be equipped with an air duct through which the contaminated air stream is removed into the ventilation drift 15.

The feasibility of using the regulating bridge 17, its aerodynamic permeability, as well as the use of a local ventilation fan (VMP) with an air duct 16 and the depth of the plant of its air duct in the treatment mine 11 are determined based on the gas content of the formations and the parameters of the equipment used.

The need for use and the length of the duct 14 is also determined by calculation, based on the gas content of the layers and the parameters of the used mining equipment.

The methods for calculating the sources of thrust 10, 13 and 16, as well as the length of the ducts and the depth of their plant in the workings (chambers) are the know-how of the present invention.

Successful tests of the proposed ventilation method have been carried out at the potash mine.

The proposed method allows to intensify ventilation in the mine working at the junction of the circulation vortex circuits, in which the dust and gas clouds mix, and also to eliminate the leakage of fresh air in the transport drift. In addition, the proposed method of ventilation allows to improve the sanitary and hygienic working conditions of miners.

Claims (6)

1. A method of removing dust and gas from a treatment mine, including supplying clean air to the bottomhole zone with a traction source that creates a vortex circulation circuit, on one side of which there is a supply of clean air, and on the other side - removing contaminated air from the bottomhole zone, in which a traction source creating the first circuit of the vortex circulation movement and forming a directed air flow contaminated by dust and gas along the mine working wall opposite to the miners' jobs, at the same time, at the junction of the first circulating vortex circuit with the next vortex circuit, there is a malfunction connecting the treatment unit with the exhaust chamber, where an additional draft source with an air duct is installed, characterized in that the exhaust chambers are knocked down with a ventilation drift, while the additional draft source installed in the exhausted chamber, oriented to work towards the ventilation drift, and a mixture of fresh air with a stream of air contaminated with dust and gas is removed through a working chamber and a ventilation drift, while fresh air is sent to the working treatment unit via a transport drift or by means of an additionally installed source of ventilation draft with an air duct, the end of which is located in the working chamber, or by means of regulating ventilation jumpers, one of which is installed on the transport drift through air flow paths between the working and spent chambers, and the other is installed at the mouth of the spent chamber located coaxially worked out the development, separated from it through the transport drift. 2. The method according to claim 1, characterized in that the additional sources of traction are provided with an air duct. 3. The method according to claim 1, characterized in that the ventilation drift is formed as the cleaning operation moves with a diagonal malfunction from the sewage treatment plant through the exhaust chamber to the design loop of the ventilation drift with through ventilation, followed by the formation of a ventilation drift to the next sewage run. 4. The method according to claim 1 or 2, characterized in that they form a directed air flow with dust and gases by including an additional source of ventilation draft located in the exhaust chamber. 5. The method according to any one of claims 1, 3, characterized in that a directed stream of a mixture of fresh air with an air stream contaminated with dust and gases is formed by switching on an additional source of ventilation draft located in the gap between the treatment plant and the exhaust chamber and oriented to work in direction to the ventilation drift. 6. The method according to claim 1 or 3, characterized in that in the fault between the spent chambers, as well as in the spent chamber adjacent to the treatment mine, in the area between its interfaces with the transport drift and the fault between the treatment mine, ventilation jumpers are installed.

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