论文部分内容阅读
本文介绍了断裂引起的应变量计算方法。断裂作用可导致连续应变和非连续应变。连续应变与断裂位移/断裂长度比值及断裂面上有效应力成正相关关系。影响非连续应变的因素有:断裂几何形态、断裂的旋转性、断裂规模。已经提出三种断裂旋转机制:刚性旋转,垂直剪切和斜向剪切。对于这三种机制,我们分别建立了断裂非连续应变的计算公式。这些公式与断裂的旋转角度和位移大小相关。刚性旋转时,断块内部没有任何塑性变形,因此地层的长度没有变化。它引起的非连续应变最小。垂直剪切作用使断块内地层变形,但水平方向的地层长度不变。推算的公式表明,对于相同的原始数据,它引起的非连续应变比刚性旋转机制引起的非连续应变大。斜向剪切也使断块内地层变形,但水平方向的长度也不变。在同等条件下,它引起的非连续应变比垂直剪切机制引起的非连续应变大。
This paper introduces the calculation method of strain caused by fracture. Fracture can lead to continuous strain and discontinuous strain. The relationship between continuous strain and fracture displacement / fracture length ratio and effective stress at fracture surface is positive. Factors that affect the non-continuous strain are: fracture geometry, fracture rotation, fracture size. Three types of fracture rotation mechanisms have been proposed: rigid rotation, vertical shear and oblique shear. For each of the three mechanisms, we have separately established the formulas for calculating the discontinuous strain at fracture. These formulas are related to the rotation angle and displacement of the fracture. Rigid rotation, there is no plastic deformation within the fault block, so there is no change in the length of the formation. It causes the smallest discontinuous strain. Vertical shear deformation of the formation within the formation, but the horizontal direction of the formation of the same length. The calculated formula shows that for the same raw data, it leads to discontinuous strain greater than the discontinuous strain caused by the rigid rotation mechanism. The diagonal shear also deforms the formation in the fault block, but the horizontal length does not change. Under the same conditions, the discontinuous strain caused by it is larger than the discontinuous strain caused by the vertical shear mechanism.