岩石压应力传递系数计算及影响机制

钻孔应变观测是地壳岩石应变相对测量的主要方法，对其附加应力场的研究，可以有效分析岩石压应力向探头的传递过程，可对应变仪有关力学参数的设计和观测数据的物理解释提供帮助。考虑到外加应力在岩石、水泥和仪器钢筒等3层介质中传递的实际情况，根据弹性力学中的厚壁圆筒方程，推导轴对称应力作用下岩石压应力的传递系数公式，分析影响机制，并给出有关变化规律曲线和定量指标。

Calculation of rock compressive pressure transfer coefficient and its influence mechanism

Borehole strain observation is the main method to measure the strain of the crust and rock. Study on the additional stress field can effectively analyze the rock compressive stress to transfer probe. The study of the design and mechanical properties of the corresponding parameters of the instrument and the physical interpretation of the observed data can provide help. Considering the applied stress transfer in the rock, cement and equipment steel tube and other 3 layers of medium, according to the thick wall cylinder equation in elastic mechanics, the calculation formula of transmission coefficient of rock stress under the action of axial symmetrical stress is derived. The influence mechanism is analyzed. And the relevant change rule curve and quantitative index are given.