本文按空间问题计算得到了岩芯中地应力在钻探过程中释放的规律,找出了岩芯中残留地应力与解除深度的关系,最大残留地应力出现的深度,残留地应力的最大相对系数,以及残留地应力状态随解除深度的变化规律。最后,推导出了各种地应力组合状态下,岩芯破裂始点应力公式。 In this paper, the law of the release of the geostress in the core during drilling is calculated according to the space problem. The relationship between the residual stress in the core and the depth of relief is found out. The depth of the maximum residual stress and the maximum relative coefficient of the residual stress are found. , and the law of the state of residual ground stress with the release depth. Finally, the stress formula at the starting point of rock core rupture is deduced under various combinations of ground stress.