基于ANSYS二次开发的采场损伤演化规律研究

摘要

In order to research fracture distribution law and gas migration law of coal and rock by mining,a second development platform ANSYS UPFs was used. An elastic damage constitutive model has been built with the help of damage variable, which can be used to describe the fracture evolution of coal and rock. It is found that the damage develops and grows with working face advancing, and the distribution feature of damage field changes from arch to saddle along the strike. In the horizontal middle survey line of the overlain strata, the observed initial damage values decrease and the damage growth rate increases.%基于ANSYS软件的UPFs二次开发平台,借助损伤变量描述煤岩体的裂隙演化,建立弹性损伤本构模型,对单一煤层分步开采过程进行模拟并研究其损伤演化规律.研究表明,随着工作面的推进,损伤不断扩展,覆岩损伤场的分布形态沿走向由“拱形”向“马鞍形”转变.上覆岩层水平方向中部观测线上,随岩层深度的增加,观测到的初始损伤值减小,损伤增长剧烈程度增加.