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本文应用断裂力学理论对垂直裂缝的延伸和形状作了定量讨论,并提出裂缝能否伸入遮挡层的判定式和延伸深度的计算式。文中提出的方法可以预测垂直裂缝的高度及遮挡层是否被压穿等问题。
In this paper, the fracture mechanics theory is used to quantitatively discuss the extension and shape of vertical fractures, and the calculation formulas of the deterministic and extension depths of fractures that can penetrate into the shield are proposed. The proposed method can predict the vertical crack height and whether the occlusion layer is pressed through and so on.