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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。
At present, the frequent occurrence of non-mining damage to the shaft in the shaft of our country has occurred repeatedly after the repair, which has brought huge losses to the coal industry in our country. The vertical additional force is considered to be the main reason for this situation. In view of this situation, taking the actual wellbore as an example, a three-dimensional integral finite element model of reinforced concrete double-wall is established by using the finite element software ANSYS as the research platform. In-depth study of a series of problems with the vertical additional force changes, the stress and strain of the wellbore failure, the location of the plastic zone, the rupture pattern, the rupture time and so on. At the same time, a set of numerical methods to predict borehole damage is established and verified with engineering examples. The results are in good agreement with the actual situation. In practical engineering, this finite element prediction method can be widely applied to coal enterprises in various regions of our country, providing a beneficial guarantee for the development of the coal industry.