[en] The contents of natural radioactive nuclides in major coal fields in Guizhou and part of the coal mines near Guiyang have been investigated. The social and economic benefits from the use of coal cinder for the production of building materials are stated. Also discussed are such aspects as the importance of classified management according to the content of natural radioactive nuclides in coal fly or coal cinder, problems arising from the application of coal fly (coal cinder) to building materials and the countermeasures to the radioactive pollution