本文介绍了SF_6示踪技术首次用于我国煤矿的装置——气相色谱仪—电子捕获鉴定器,分析原理及操作方法。介绍了井下检测采空区微小漏风的示踪实验实例。实验结果表明,SF_6气体能够适用于煤矿井下的复杂环境,能够实现对漏风风流的跟踪检测,检测灵敏度1×10~(-10)。是一种较理想的示踪气体,具有广泛的应用前景。 This article describes the first SF_6 tracer technology used in China’s coal mine equipment - gas chromatography - electron capture detector, analysis of the principle and method of operation. This paper introduces a tracer experiment example of detecting small air leakage in the underground mine. The experimental results show that the SF 6 gas can be applied to the complex environment in coal mines, and the tracking and detection of air leakage can be realized with the detection sensitivity of 1 × 10 -10. Is a more ideal tracer gas, has a wide range of applications.