自从德国学者伦琴1895年发现X射线以来,X射线已在许多领域得到广泛的应用。一些学者也曾引用到煤的研究上来,但由于条件的限制,进展较慢。近年来,一些学者利用X射线衍射仪对煤进行研究,他们根据各种不同变质程度煤的衍射曲线的差异来确定煤的变质程度,效果比较好,特别是对高 Since the German scholar Roentgen discovered X-ray in 1895, X-ray has been widely used in many fields. Some scholars have also cited the study of coal, but because of the conditions, progress is slow. In recent years, some scholars use X-ray diffractometer to study coal. According to the difference of diffraction curves of coal with different degrees of metamorphism, some scholars determine the degree of coal metamorphism with good effect, especially for high