Radon precipitation simulation device based on low-frequency vibration and radon precipitation rate measurement method

Abstract

The invention discloses a radon precipitation simulation device based on low-frequency vibration and a radon precipitation rate measurement method. The simulation device comprises a power amplifier, asweep signal generator, a radon precipitation module, a dryer and a radon measuring instrument; wherein the radon precipitation module comprises a vibration exciter, a radon precipitation tank, a topcover, a vibrating rod and a sliding rail. The radon precipitation tank contains a uranium ore rock test block, the vibration exciter is fixed on the sliding rail and connected with the power amplifier, and the vibration rod is arranged between the vibration exciter and the radon precipitation tank. A base platform capable of moving along the sliding rail is arranged on the sliding rail, the radon separation tank is fixed on the base platform, and an airflow loop is formed between the top cover and the radon measuring instrument. The drier is arranged on a pipeline path communicated with thegas outlet of the radon precipitation tank and the gas inlet of the radon measuring instrument. According to the device, the radon precipitation of a uranium mine rock in the low-frequency vibration can be simulated, and experimental data can be obtained. A data basis for researching the change rules of the continuous radon precipitation rate of uranium ore rocks under the action of low-frequencydisturbance loads is provided.

Description

technical field [0001] The invention relates to a low-frequency vibration-based radon exhalation simulation device and a method for measuring radon exhalation rate. Background technique [0002] With the depletion of uranium resources above the surface and shallow underground in China, it is an urgent problem to study the precipitation mode and prevention of radon in deep uranium mining. Regarding the relationship between the amount of radon released in the rock mass and the micro-cracks generated by vibration, the domestic academic circles have carried out some research on this. The radon anomaly is related to the micro-cracks generated under the condition of mechanical vibration. S Mollo et al. studied the radon exhalation law of fractured rocks, and found that the crustal vibration produced by earthquakes and volcanic activities will have a certain impact on the radon exhalation before rock fracture. Lu Hanjiang studied the characteristics of radon emanation changes in ...

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Problems solved by technology

[0003] During the mining process of underground uranium resources, mechanical vibration or changes in geological structure may cause the rupture of the surrounding rock of the uranium mine and lead to an abnormal increase in the amount of radon precipitation. It is related to the characteristics of micro-cracks produced by rock fracture, but there is still a blank on the law of radon precipitation in uranium mine surrounding rocks under the action of low-frequency vibration during uranium mining operations. The simulation device affected by the rate can obtain experimental data, and then according to the experimental data, the continuous radon exhalation rate of uranium ore rocks under the action of low-frequency disturbance loads can be calculated, and then provide a basis for studying the law of the continuous radon exhalation rate of uranium ore rocks under the action of low-frequency disturbance loads. The data basis provides a theoretical basis for the prevention and control of radon radiation in underground mining of uranium mines

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