薄层单元在覆岩离层模拟中的应用

Application of Laminar Layer Element in Simulation of Overburden Delamination

开采区覆岩离层注浆减沉技术需要掌握覆岩的离层规律。本文利用薄层接触元模拟覆岩内部岩层接触面 ,用粘弹性三单元模型建立本构关系 ,用有限单元方法模拟离层的动态发育规律 ,得到了离层产生、发展的动态过程。对覆岩离层带高压注浆减沉工程设计具有指导意义。

Control of subsidence by grouting in the space caused by the bed-separation of the overburden in a mining area requires a good understanding of the rules of bed-separation in overburden. In this paper, the strata contact face inside the overburden is simulated using the laminar layer contact element, the constitutive relationship is established through a visco-elastic tri-elementary model, and the dynamic evolving rules of bed-separation developing are simulated using the finite element technique. As a result, an insight is got into the dynamic process of occurrence and evolvement of bed-separation, which offers guidance to engineering design of subsidence control of overburden abscission layer using high pressure grouting.