Uranium concentration in coalbeds reflects tectonic development and evolution of coal-forming processes.
煤中铀的富集成矿，可反映成煤大地构造的演化。
2
Most of the coalbeds in Panguan syncline are easilydrainable or drainable, and some are hard drainable. The lower coalbeds are better than the upper coalbeds in air penetrability.