不同变质程度脆性变形煤的XRD研究  

XRD Study on Brittle Deformation Coal of Different Metamorphism Degree

作　　者：白何领[1] 潘结南[1] 赵艳青[1] 王海超[1] 姚利萍[1] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000

出　　处：《煤矿安全》2013年第11期12-14,共3页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41072153);中国科学院战略性先导科技专项基金资助项目(XDA05030100)

摘　　要：煤的大分子结构主要受煤变质变形2个方面因素的影响,变质程度相同而变形性质和变形程度不同,其大分子结构特征也不一样。通过对17个不同变质变形程度脆性变形煤的XRD实验研究,结果表明,随变质变形程度增加,衍射峰变得更加尖锐,衍射角逐渐增加。Lc和Nc随煤变质程度增加而增大,且强脆性变形煤比弱脆性变形煤大。La随煤变质程度增加而增大,但在中高变质阶段以后强脆性变形煤比弱脆性变形煤明显大一些。La/Lc的值随煤变质程度增加表现出先减小后增大的过程。The macromolecular structure of coal was mainly affected by the metamorphism and deformation degree, the macromolecular structure was different at different deformation properties and deformation degree even though at the same metamorphism degree. In this paper, it carried out X -ray diffraction（XRD） experimental study for 17 brittle deformed coal samples with different metamorphism and deformation degree. The resuhs indicated that the diffraction peaks became more acute, and the diffraction angle gradually increased with the increase of metamorphism and deformation degree. The values of Lc and Nc increased with metamorphism degree increasing and the deformation degree of strong brittle deformation coal was bigger than weak brittle deformation coal. The value of La increased with metamorphism degree increasing, but strong brittle deformation coal was obviously bigger than weak brittle deformation coal after middle and high metamorphism stage. The value of LJLo first decreased and then increased with metamorphism degree increasing.

关 键 词：煤 大分子结构 变质变形 XRD 脆性变形 

分 类 号：TD313[矿业工程—矿井建设]