Method for dust and gas removal from dead stope ore

FIELD: mining.

SUBSTANCE: method consists in the fresh air supply with ventilator into bottomhole zone and removal of air mixture contaminated with dust and gas from dead stope ore through the wells, which are drilled at regular times in interchamber pillar between the dead and worn stope ores. An interval between the wells doesn't exceed the distance of efficient offscouring of dust-gas mixture with draft source, mounted in the bottomhole space of the dead stope ore. Contaminated air is removed through the worn stope ore, broken into the haulage roadway, and then through haulage roadway. In this respect, the wells from worn stope ore neighbouring to the dead stope ore are preliminary drilled until the configuration of the dead stope ore. Well mouth in the dead stope ore is equipped with effuser, and the well mouth in the worn stope ore is equipped with a coupler connected to the ventilator aligned for the work in direction to haulage roadway. Ventilator is carried over to the well newly uncapped with combined machine.

EFFECT: lowering of air dustiness and reduction of combustive and poisonous gases in the dead stope ore.

4 cl, 2 dwg

 

The invention relates to the mining industry and can be used in underground mining to remove dust and hazardous gases from a dead-end workings, mostly in the chamber testing.

A known method of ventilation stub mining, including drilling of the previously completed production moving on it the fresh air in the ventilated dead-end production, installation in the previously completed through the development of local ventilation fan, connection with local ventilation fan rod flexible ventilation pipes, the construction of this rod through the hole in ventilated dead-end production and feed it fresh air, while the well after drilling to expand the cross-sectional area not less than the sum of the cross-sectional area of the pipes of the ventilation rate and the minimum cross-sectional area of the ventilation openings (Patent No. 2162946 of the Russian Federation from 22.03.1999, publ. 10.02.2001, bull. No. 4 (II)).

The disadvantage of this method is airing stub generation due to the injection of fresh air, i.e. dilution of polluted air. However, high concentrations of harmful gases in the atmosphere dead-end workings of their dilution to acceptable concentrations often technical the key is unreachable since in this case the amount of feed in the production of fresh air limit to the speed of its movement. For example, in the Verkhnekamskoe potash-magnesium salts (sub-surface) in the production of mining released hydrogen sulfide. The maximum allowable concentration of hydrogen sulfide in the atmosphere produce should not exceed 0,00071 volume percent (PB 03-553-03). When the maximum allowable air speed is also limited to four m/S. Therefore, to ensure proper dilution of this gas to MAC is often technically impossible.

Closest to the proposed invention is a method of removing dust and gas cleaning produce, including fresh air in the bottomhole zone of the source of thrust, creating a vortex circulation loop, one side of which is supplied with fresh air, while on the other side - the removal of contaminated air from the bottom zone, where the post source of thrust, which creates the first circuit circulation of the vortex motion and generates a directed flow of air contaminated by dust and gas along the walls of the excavation, opposite the jobs of miners, while at the connection point of the first circulation of a vortex loop with the following vortex contour are linkage, connecting mountain development, the subject treatment works, with waste chamber where installing an additional source of thrust, provided with a duct (patent No. 2392440 of the Russian Federation dated 27.04.2009, publ. 20.06.2010, bull. No. 17).

The disadvantage of this method is the necessity of sinking mezhdurebernyh of sboc through Mezhdunarodnye pillars. In this case, along with a decrease in the bearing capacity mezhdurebernyh pillars slaughter at a certain time will be far enough away from breakthrough (until you have the opportunity to go new works, i.e. the efficiency of ventilation is reduced.

The technical result of the invention is to reduce the dust content and the concentration of combustible and toxic gases in a cul-cleaning formulation, which is blasting and transportation smitten rock mass, and, accordingly, improvement of sanitary and hygienic working conditions of miners.

This technical result is achieved in that in the method of removing dust and gas from a dead-end cleaning produce, including fresh air in the bottomhole zone of the fan with fresh air in the bottom zone on one side of the treatment stub generation, and directly in the bottomhole formation zone, place the source of thrust, which forms a directed flow of air contaminated with dust and gas along the wall of the treatment stub generation, across the lagoon to the false jobs of miners, when this treatment stub generation connect with neighboring wastewater treatment development, which establish an additional source of thrust, the mixture contaminated with dust and gas of the air removed from the stub cleaning production through wells that are drilling periodically in mezhdunarodnom the pillar between the stub and wastewater treatment workings, the distance between the wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation, and the contaminated air is removed through the waste treatment production, brought down from the ventilation passage, and further on the ventilation drift.

Wells are drilled from pre wastewater treatment develop adjacent to the stub of the treatment development, to the design of the circuit stub cleaning formulation, with the wellhead in a cul-cleaning formulation equip confuser, and the wellhead in the waste treatment development will be equipped with an adapter, which connects with the fan oriented to work in the direction of the ventilation passage, and a fan transferred to the newly opened combine well.

The essence of the invention is illustrated by drawings, where figure 1 - General scheme of ventilation cleaning deadlock in the processing; figure 2 - node A.

In the drawings denote: 1 - at the same time stub generation; 2 - waste treatment development; 3 - well; 4 - Mezhdunarodny pillar; 5 - confuser; 6 - adapter; 7 - local ventilation fan; 8 - vent drift; 9 - an additional source of ventilation draught; 10 - vent pipe; 11 - local ventilation fan for filing in the production of fresh air; 12 - slaughter; 13 - polluted air; 14 - fresh air, 15 - harvester.

The method is as follows.

Treatment stub generation 1 and waste treatment production 2 connect the 3 wells drilled through Mezhdunarodny pillar 4 (figure 1).

Well 3 Buryats of the pre-waste treatment production 2 adjacent to the treatment stub generation 1, to the design of the contour of the treatment stub generation, and then open as podvigina slaughter. Wells are drilled through a certain distance periodically, mezhdunarodnom the pillar between the stub and wastewater treatment workings. The distance between the wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation. Wells can be drilled at a convenient height mezhdunarodnogo pillar.

The distance between the wells take depending the spine from power an additional source of draught 9, it corresponds to the range of garbage from his dust-gas mixture. The calculation method is the know-how of the invention.

At the mouth of the bore 3 in the treatment stub generation 1 set the confuser 5, and in the wellhead to the treatment of waste generation 2 adapter 6, coupled with local ventilation fan 7 is installed in the treatment of waste generation 2, whisked with ventilation passage 8 (Figure 2).

In the bottom space of the treatment stub generation 1 establish an additional source of ventilation draught 9, the guide-contaminated dust and gas of the air flow in the direction of the confuser 5. An additional source of ventilation draught 9 can be installed directly on the processor 15, and in the treatment stub generation 1, between running harvester 15 and opened by the well 3, the wall opposite the jobs of miners. In the treatment stub generation 1 establish an additional source of ventilation draught.

Fresh air 14 flows into the bottom space of the treatment stub generation 1 vent pipe 10 from local ventilation fan 11 mounted outside the dead-end of the treatment formulation. Further, fresh air washes the face 12 and thins powder-gas mixture. An additional source of ventilation draught 9, posted in PR is downhole, directs the contaminated air 13 to the confuser 5, installed in the opened well 3, located near the bottom 12. In the waste treatment formulation 2, whisked with ventilation passage 8, the adapter 6 in the well mounted local ventilation fan 7 and Orient it to work in the direction of the ventilation passage 8, and the fan is transferred to the newly opened hole. Next polluted air 13 through the confuser 5 and a pipe secured in the bore 3, is delivered to the local ventilation fan 7.

From waste treatment production 2 polluted air 13 is removed by a ventilation passage 8, and then through mine depression issue on the surface.

The process of removing contaminated air from the bottom using a well drilled at a convenient height wall framing place and which is near the bottom, but the equipment of the well will not interfere with the operation of the harvester. When podviganiya slaughter equipment is well tolerated after slaughter to the next well.

The proposed method will improve sanitary and hygienic conditions of work miners due to the intensification of removal of dust-gas mixture from the bottom stub of the treatment formulation.

1. Method of removing dust and gas from a dead-end cleaning produce, including fresh without the ha in the bottomhole zone of the fan, with fresh air in the bottom zone on one side of the treatment stub generation, and directly in the bottomhole formation zone, place the source of thrust, which forms a directed flow of air contaminated with dust and gas along the wall of the treatment stub generation, opposite the jobs of miners, with clean-stub generation connect with neighboring wastewater treatment development, which establish an additional source of thrust, characterized in that the mixture of contaminated dust and gas of the air removed from the stub cleaning production through wells that are drilling periodically in mezhdunarodnom the pillar between the stub and wastewater treatment workings, the distance between wells does not exceed the effective range of garbage dust-gas mixture source of thrust, installed in the wellbore space stub cleaning formulation, and the contaminated air is removed through the waste treatment production, brought down from the ventilation passage, and further on the ventilation drift.

2. The method according to claim 1, wherein the pre-drilling of wells from wastewater treatment develop adjacent to the stub of the treatment development, to the design of the circuit stub cleaning output.

3. The method according to claim 1, wherein the wellhead in a cul-cleaning exp is the development of tools confuser.

4. The method according to claim 1, wherein the wellhead in the waste treatment development will be equipped with an adapter, which connects with the fan oriented to work in the direction of the ventilation passage, and a fan transferred to the newly opened combine well.



 

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