大别山北麓高煤级煤显微裂隙分布特征

Distribution characteristics of micro-fracture of high rank coals in northern foot of Dabie Mountains

通过煤岩学方法研究大别山北麓杨山煤系高煤级煤中的显微裂隙,探讨了不同变形-变质类型煤的裂隙分布特征及其影响因素。大别山地区特殊的地质背景,形成了各种级别的构造裂隙,尤其是受到多期构造作用和岩浆活动的影响,使得高煤级煤中显微裂隙的分布及演化具有特殊性和复杂性。

The paper introduces the use of coal petrology method to study micro-fractures of high rank coals of the Carboniferous period coal produced in the northern foreland basin of Dabie Mountain, and to explore the distribution characteristics of micro-fracture in different deformational-metamorphic types coals and the influence factors. The particularity of the geological background results in several scales of structural fracture, especially the complexity and particularity of micro-fracture distribution and evolution, as influenced by the multi-stage tectonic deformations and magmatic activities.