1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control ( HPU),Jiaozuo　 454003,China;2. Institute of Gas-geology,Henan Polytechnic University,Jiaozuo　 454003,China;3. Jiaozuo Coal Industry Co. ,Ltd. ,Henan Energy and Chemical Industry Group Co. ,Ltd. ,Huixian　 453633,China

构造煤是煤层受地质构造挤压、剪切作用的产物,其晶态结构可能记录了构造作用的痕迹。以煤变形变质为基础,结合X射线衍射(XRD)、核磁共振波谱(NMR)、气相色谱/质谱(GC/MS)等煤结构测试技术,通过对比研究不同类型煤的微晶结构特征和有机质结构演化等,揭示了构造煤微晶取向生长机制:1形成过程中煤层破坏产生断裂、微裂隙及劈理等,由封闭系转变为开放系,为构造煤微晶生长提供受限空间;2构造应力、重力及吸附作用等,是构造煤微晶取向生长的驱动力;3因受限空间和取向作用约束,构造煤微晶倾向于以平躺片晶的形式生长,煤大分子通过调节分子构象及链段排列等达到稳定状态。本研究成果有助于煤结构演化和构造煤物理-化学成因探讨,并能够丰富煤成烃和煤变质理论。

Tectonic coal is the product of strong tectonic compression and shear actions,and its crystalline structure perhaps records the tectonic features. In this paper,the microcrystal structure the organic matter evolution of badly twisted tectonic coal and its symbiotic un-tectonic coal were investigated by means of coal structure analytical method ( such as XRD,NMR,GC / MS and so on). Combined with the result of coal deformation-metamorphism feature and the power basis of forming tectonic coal,the confined-space oriented growth mechanism of coal microcrystal is tentatively proposed. The main points of the mechanism include:During forming tectonic coal,the system changed from a closed mode into an open one because of fracture structure,microfractures and cleavage in coal seam,then tectonic coal de- lamination became the confined spaces of coal microcrystal growth;Tectonic stress,gravity and adsorption were the driving forces for coal microcrystal oriented growth;Being confined-space and orientation binding,the growths and ar- rangements of coal microcrystallines tended to lie low like that of lamellar crystals,in the meanwhile,coal polymers reached the steady state through self-adjusting molecular conformations and chain arrangements. The results are useful for studying the coal structure evolution and physial-chemical mechanism of forming tectonic coal.

国家科技重大专项资助项目(2011ZX05040-005)；国家自然科学基金资助项目(41102094)；河南省高校科技创新团队支持计划资助项目(14IRTSTHN002)；

Zhang Xiaobing,Wang Wei,Zhang Yugui,et al. Oriented growth mechanism of tectonic coal microcrystal[J]. Journal of China Coal Socie- ty,2016,41(3):712-718.