露天开挖诱发井采区覆岩与边坡相互扰动机理

Mechanism of Mutual Disturbance between Overlying Rock and Slope Induced by Open-pit Excavation in Mining Areas

为研究井工转露天开采诱发边坡及地表移动规律以及复合开采相互作用机理,利用Midas和Flac3D数值模拟软件模拟得出井工开采结束后进行露天开采时地表沉降和位移变化值并绘制出曲线图,随着采区工作面推进,上覆岩体受到多次破坏扰动,其影响域相互叠加,导致移动与破坏范围增大从而揭示边坡及地表移动规律。根据规律总结得出复合开采相互作用机理的嵌套效应及连锁效应。

In order to study the laws of slope and surface movement induced by the conversion of underground mining to open-pit mining,as well as the interaction mechanism of composite mining,Midas and Flac3D numerical simulation software were used to simulate the changes in surface settlement and displacement during open-pit mining after the completion of underground mining,and curve graphs were drawn.As the working face of the mining area advanced,the overlying rock mass was subjected to multiple damage disturbances,and their impact domains overlapped with each other.This leads to an increase in the range of movement and damage,revealing the patterns of slope and surface movement.The nested and chain effects of the interaction mechanism of composite mining are summarized based on the rules.