松散煤岩中放射性氡多角度扩散试验装置研制及应用  

Development of the experimental device for testing multi-angular diffusion of the radioactive radon and its application in the loose coal and rock media

作　　者：张辛亥[1] 王辉[1] 郭戎[1] 成小雨[1] ZHANG Xin-hai WANG Hui GUO Rong CHENG Xiao-yu(Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education, College of Mineral Engineering, Xi＇an University of Science and Technology, Xi＇an 710054, China)

机构地区：[1]西安科技大学西部矿井开采及灾害防治教育部重点实验室能源学院,西安710054

出　　处：《安全与环境学报》2016年第6期80-84,共5页Journal of Safety and Environment

基　　金：国家自然科学基金联合基金项目(U1361129)

摘　　要：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 this paper, we have developed an experiment device for testing the multi-angle diffusion of radon in the loose coal and rock media for disclosing the migration regularity of radon in the loose coal and rock media so as to lay down a theoretical basis for detecting the subtle position of radon in leading to the coal sponta- neous combustion in the mine, the process of which mainly consists of the diffusion pipeline, the system for the temperature mo- nitoring and measurement, the angular adjustment system as well as some other supplementary systems. The said device intends to be used to perform the radon diffusion experiments in different temperatures, coal granule sizes and voidage in different directions. While the device can be used for many purposes, the present paper tends to focus its attention on the impact of the radon migration regularity on the horizontal and vertical experiments. And, that is why it has to adjust its angles from 0 to 60° to satisfy the radon migration tendency in a slope. That is, first of all, we have to introduce the influential factors of the radon migration. And, then, we would have to introduce the structure and method on how to use the said device for the targeted radon diffusion ex- periments at different temperatures by setting the inclined angle of 45° and coal voidage of 13.7% quantitatively. The results of our experiments show that the temperature should be the key influential factor which tends to affect the radon migration in the underground condition. For example, when doing the＇ experiment, the angular adjustment system can help to operate the said experiments on the radon diffusion in different directions whereas the temperature measuring and monitoring system are used to control the effects of the temperature variation on the radon diffusion. In the diffusion direction, the radon concentration tends to reveal a non-linear decreasing tendency, however, the attenuation rate and amount of the radon content tends to decrease gradually. Moreover, with the growth of th

关 键 词：安全工程 火源探测 放射性氡 多角度扩散 试验装置 

分 类 号：X936[环境科学与工程—安全科学]