The separating out rate of radon was figured by the content of radium in the samples of construction material,through the mensuration of natural radioactivity and by measuring the density of radon that is released by the samples through ZnS sparking method.

Based on remote-sensing geology and very-low frequency anomalies of the central part of the Shule River fault zone, this paper,by means of determining concentration of radon emanation at the surface above the fault zone, has analysed and evaluated the stability of the central part of the Shule River fault zone.