摘要
针对同位素测氡法探火工作量大,周期长,易受气候及环境因素制约的问题,利用氡在向地表运移过程中产生的,能精确反映母体氡在一段时间中的累积值的固态长寿命子体^(210)Po,提出了基于放射化学分析手段测定^(210)Po活度浓度探测隐蔽矿井火区的氡子体^(210)Po法探火。为了探究氡子体^(210)Po法探火在现场探测中的效果与精度,在已知火源位置的柳湾煤矿开展了现场实验研究,在井下火区对应地表位置进行网格测点布置,对测点处的氡气浓度及其固态长寿命子体^(210)Po的活度浓度进行测量。通过比较氡气浓度与^(210)Po活度浓度探测结果相关性及其影响因素,对利用氡子体^(210)Po探测采空区煤自燃火源位置的技术进行论证。结果表明,火区近地表土壤层氡气浓度与^(210)Po活度浓度在总体分布上具有很强的相关性,但^(210)Po活度浓度受外界因素干扰较小,其分布更能准确反映井下煤自燃火区情况。相比同位素测氡法,氡子体^(210)Po法探火的探测精度更高,适用范围更广,具有更高的应用价值。
Aiming at the shortcomings of isotope radon detection method, which has large workload, long period, and is easily restricted by climate and environmental factors this paper proposes the use of radon generated during the process of migration to the surface to accurately reflects the solid-state length of the cumulative value of parent radon over a period of time. Long-lived radon daughter^(210)Po fire detection method based on radiochemical analysis method to measure^(210)Po activity concentration to detect hidden mine fire areas. In order to explore the effect and accuracy of the radon progeny^(210)Po fire detection method in on-site detection, this paper carried out on-site experimental research in Liuwan Coal Mine where the fire source location is known.The radon gas concentration at the measuring point and the activity concentration of its solid long-lived daughter^(210)Po are measured.By comparing the correlation between radon gas concentration and^(210)Po activity concentration detection results and its influencing factors, the technology of using radon daughter^(210)Po to detect the location of coal spontaneous combustion in goaf is demonstrated.The results show that the radon concentration in the near-surface soil layer in the fire area has a strong correlation with the^(210)Po activity concentration in the overall distribution, but the^(210)Po activity concentration is less disturbed by external factors, and its distribution can more accurately reflect the underground coal spontaneous combustion fire area. Compared with the isotope radon detection method, the radon progeny^(210)Po fire detection method has higher detection accuracy, wider application range and higher application value.
作者
林晨
王俊峰
董凯丽
刘轩
LIN Chen;WANG Junfeng;Dong Kaili;LIU Xuan(College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Engineering Research Center for Mine Ventilation and Fire Prevention,Taiyuan University of Technology,Taiyuan 030024,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《太原理工大学学报》
CAS
北大核心
2023年第1期73-80,共8页
Journal of Taiyuan University of Technology
基金
山西省基础研究计划青年项目资助(202103021223104)
国家自然科学基金资助项目(52074188)。
关键词
煤自燃
火源位置
地表探测
氡子体^(210)Po
coal spontaneous combustion
fire source location
surface detection
radon progeny^(210)Po
