The characteristics of radioactivity radon anomaly on the exhausted / subsidence district of coal mines

摘要

Because of the radioactivity radon measurements is in possession of the advantages of simple, convenient, direct and efficient, it was played an important role in the detection of the exhausted and subsidence districts. Based on the analysis of the mechanics that formed soil radon anomaly above the exhausted area, subsidence district and abandoned coal pillar, this paper discussed the radon concentration anomaly differences among them, and analyzed the anomaly curve characteristics responsible on these districts. Combined with the actual profile measured on the exhausted district in Yingcheng, the radon concentration anomaly characteristics and its form mechanics were discussed.