System and method for controlling radon seepage in blasting uranium ore heap of underground uranium mine stope

Abstract

The invention discloses a system and method for controlling radon seepage in a blasting uranium ore heap of an underground uranium mine stope. The system comprises a terminal regulating controller, afirst temperature and pressure sensor, a second temperature and pressure sensor, a frequency conversion fan, air barrels, an air pressure difference regulating and controlling air door and a flowmeter. The air barrels comprise the flexible air barrel and the rigid air barrel. The first temperature and pressure sensor, the second temperature and pressure sensor, the flowmeter, the frequency conversion fan and the air pressure difference regulating and controlling air door are all connected with the terminal regulating controller. The air barrels are arranged in an air return way. An outlet of the frequency conversion fan is connected with the lower ends or the upper ends of the air barrels. The air pressure difference regulating and controlling air door is arranged on the lower section or the upper section of the rigid air barrel. The flowmeter is arranged on the upper section or the lower section of the rigid air barrel. The first temperature and pressure sensor is arranged in a stoping space. The second temperature and pressure sensor is arranged in an ore drift transportation roadway. According to the system and method for controlling radon seepage in the blasting uranium ore heap of the underground uranium mine stope, radon seepage in the ore heap can be controlled, the seepage radon precipitation amount is minimized, the ventilation quantity of the stope is decreased, energy is saved, and the stope ore heap radon precipitation amount, the mine ventilation cost and the radon release amount of a whole uranium mine to the external environment are decreased.

Description

technical field [0001] The invention belongs to the technical field of radon seepage control of underground uranium mine stope blasting and particularly relates to a system and method for controlling radon seepage of underground uranium mine stope blasting uranium ore piles. Background technique [0002] In uranium mining, radon and radon daughters in the mine air are the main sources of occupational exposure of uranium mine workers. Due to the diffusion and migration of radon and radon daughters in ore piles, they have become radon and radon daughters in the air of uranium mines. The main source of radon progeny. For uranium mines using the ore-retaining mining method, about 1 / 3 of the caving ore volume is released through the mouth of the bottom ore-drawing funnel after each ore fall, resulting in more ore temporarily stored in the mine room and a larger exposed area of ​​ore. Workers spend most of their working time on the ore heap. Due to the better permeability of the ...

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Problems solved by technology

[0003] In order to make the ventilation quality of uranium mine underground stope and other working places meet the national standard, the current design method of uranium mine ventilation mainly adopts the method of increasing the ventilation air volume or using traditional local fans to forcibly exhaust radon from the ore heap, and does not take the stope ore into consideration. The impact of stockpile volume and gas seepage in the stockpile on the amount of radon precipitation has also failed to consider the impact of changes in stockpiling height on stope ventilation and ventilation resistance

The current method of increasing the ventilation air volume or forcedly extracting the radon from the ore pile not only increases the ventilation air volume, but also increases the amount of radon discharged from the entire stope, which cannot meet the requirements of energy saving and emission reduction.

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