论文部分内容阅读
为了进一步研究放射性氡在松散煤岩介质中的运移规律,为氡法探测矿井煤自燃隐蔽火源位置提供一定的理论依据,自主研制了松散煤岩介质中放射性氡多角度扩散试验装置。该试验装置可以进行放射性氡在不同温度、粒度和空隙度的松散煤岩介质中不同方向上的扩散试验。利用该装置成功进行了一次放射性氡在45°倾斜方向上、不同温度煤体中的扩散试验。试验结果表明:在扩散方向上氡浓度呈非线性减小趋势,氡浓度衰减率及衰减量逐渐降低;随温度升高,氡浓度呈线性上升趋势,且扩散方向上氡浓度衰减量增大,衰减率减小;在扩散方向上,氡浓度受温度变化影响逐渐减弱。
In order to further study the regularity of radioactive radon migration in loose coal and rock media and to provide a theoretical basis for detecting the location of spontaneous combustion of coal mine by radon method, a radon radon multi-angle diffusion experiment device for loose coal and rock media was developed independently. The test apparatus can perform diffusion tests of radon in different directions in loose coal media of different temperature, particle size and porosity. The device was used to successfully conduct a diffusion test of radon radon at different temperatures in a 45 ° tilt direction. The results show that the radon concentration decreases non-linearly in the direction of diffusion, and the decay rate and attenuation of radon decrease gradually. With the increase of temperature, the radon concentration increases linearly and the attenuation of radon concentration in the direction of diffusion increases. Attenuation rate decreases; in the direction of diffusion, radon concentration gradually diminished by temperature changes.