【摘要】 本文详细讨论了华北地区盆地内水平应力和垂直应力以及最大剪应力随深度的变化,找出了水平应力与垂直应力之比与深度的关系。鉴于2100米以下超孔压带的存在,对该带内测得的所有最大水平主应力值作了孔压修正。 区内最大水平主应力方向近东西,变化幅度随深度增加逐渐变小,从地表到4000米深处,基本存在S_H=σ₁、S_h=σ₃、S_v=σ₂的应力状态。因此,我们推测区域内现今构造活动模式浅部为平移断层,深部为平移正断层。更多还原

【Abstract】 This paper discussed in greater detail the variation of the horizontal and vertical stress as well as the maximum shear stress with depth in the basin of North China , and found out the relations between depth and the ratio of horizontal stress versus the vertical. Because there is a super pore pressure zone under 2100m depth, we have made a pore pressure revision to all of SH in this area.In this area, the orientation of the maximum horizontal principal stress is nearly E - W. The scope of variations will decrease with the increase of depth. From surface to 4000m depth, the stress state is SH=σ1, Sh = σ3, SV =δ2. Therefore, we consider that the models of the recent tectonic movement in this area are strike-slip faulting at shallow position and slip-normal faulting at the deep.更多还原