厚表土立井井壁破坏数值模拟研究

Numerical Model Research of Super Deep Shaft Sidewall Destruction

目前我国立井井筒频繁发生非采动破坏,在修复后一段时间又发生重复破坏,给我国煤炭行业带来了巨大的损失。而竖直附加力被认为是造成该种情况的主要原因。针对这种情况,以实际井筒为例,利用ANSYS有限元软件为研究平台,建立了钢筋混凝土双层井壁三维整体式有限元模型。深入研究了随着竖直附加力的变化,井壁破坏时的应力应变情况,塑性区的位置、破裂形态,破裂时间等一系列问题。同时建立了一套对井壁破坏进行预测的数值方法,并结合工程实例进行验证,结果与实际情况非常吻合。在实际工程中,这种有限元预测方法可以广泛的应用到我国各个地区的煤炭企业中,为煤炭行业的发展提供一种有益的保障。

The non-mining damage of shaft occurred frequently in China.Especially,it may manage to occur repeatedly after repair.This causes heavy losses to the coal industry in China.The vertical additional force on the shaft is regarded as the main reason.This article takes the actual shaft as an example to establish a three-dimensional integral finite element model of double reinforced concrete sidewall by the software of ANSYS.The stress and strain at the time of sidewall damage as the vertical additional force change is investigated in this article,as well as the plastic zone location,the damage form and time.A set of numerical methods which can forecast the sidewall damage is established.The result of this method coincides well with the practical situation.This forecasting method can be used widely in the coal industry in China.This may be a good protection for the coal industry.