【摘要】 阐述了煤岩温升过程中氡的析出规律和氡在地层中的分布及运移规律,推导出在自然发火状态下地层中的氡浓度分布方程,确定了其边界条件,通过求解,得出火区以上地层中的氡分布函数.结果表明,氡及其子体可以在地层中长距离运移,并且随温度的升高,煤岩中氡的析出量有规律的增加,因此能够通过地面同位素测氡技术精确定位地下火源位置和推算火源温度.更多还原

【Abstract】 Radon distribution and migration rule in stratum and the emission regulation under the process of heating coal sample are introduced. The distribution equation of Radon concentration in stratum under spontaneous fire is deduced,and the boundary condition is given. Radon distribution function over the fire is calculated. The result reveals, Radon and its daughters can migrate for a long distance in stratum,and Radon emission ratio in coal and rock increases regularly with the increase of the temperature. So it is truly possible to position the underground fire and calculate its temperature by surface isotopic Radon measurement technique.更多还原