中文摘要：

为了掌握氡探测煤矿隐蔽火源的机理,运用自主设计的可控角度实验装置,以铀矿石为氡源,研究分析了氡在侏罗纪煤体中不同煤温条件下和不同方向上（β倾角）的运移规律。实验结果表明,氡在侏罗纪煤体中的运移具有方向性：同一煤温时,距氡源相同距离位置处的氡浓度值随β倾角的增加而增大;同一方向上,氡浓度值随距氡源距离的增加而减小,温度越高减小速率越快;同一位置处温度越高氡浓度值越大。计算出了不同煤温下和不同方向上氡在侏罗纪煤体中的运移系数、运移速度和运移总量,结果表明运移系数、运移速度和运移总量均随方向和温度的变化呈一定的变化规律,发现氡-氦团簇作用是氡在侏罗纪煤体中竖直运移的主导因素;运移系数、运移速度和运移量随β倾角的变化规律解释了氡在侏罗纪煤体中运移具有方向性的原因,对测氡法探测隐蔽火源位置具有一定的指导意义。

英文摘要：

In order to grasp the mechanism of radon detecting hidden fire in coal mine. In this paper, taking uranium ore as the radon seed, angle-controlled self-designed experimental device was employed to research and analyze the migration law of radon corresponding to temperature and direction（ angle defined as β） in Jurassic coal body. Experimental results showed that the migration of radon in Jurassic coal was directional. At the same temperature, concentration of radon at the same distance from radon seed increased with the increase of angle β; In the same direction, the concentration of radon decreased with the increase of distance from radon seed and the higher the temperature was, the higher the rate of decrease was. In the same position, the higher the temperature was, the higher the radon concentration was. Meanwhile, the migration coefficients, velocity and volume of radon in Jurassic coal at different temperatures and directions were calculated. And the results showed that the migration coefficients, velocity and volume changed regularly with the change of temperature and direction. It was found that cluster of radonhelium was the dominant factor resulting in the vertical transport of radon in Jurassic coal. The reasons for directional migration of radon in Jurassic coal was explained based on the variation of migration coefficients, velocity and transport volume with the change of angle β, and it was significant for the exploration of hidden fire sources based on radon measuring method.