空心包体应力测量的几个问题

Some Problems of Stress Measurement for Hollow Inclusion

本文以一现场实测资料为例,将两种不同理论的计算结果进行比较,指出为了解决空心包体轴向应力偏大的问题,除了理论上的深入研究改进之外,还应改进探头粘贴材料和方法。对于软岩不存在上述问题。用于应力计算的力学参数,必须准确测试和选择弹性模量,但泊松比取值范围小且对应力计算影响不大,参考有关资料取值即可。

Taking a certain in-situ stress measurement as an example,the results calculated by two kinds of different theories were compared in this paper.It also pointed out that in order to solve the problem that by CSIRO method,the drilling axial stress some- times tends to be higher than the real one,it is necessary continuing to develop rele- vent analysis theory as well as improving the probesticking material and sticking impl- ementation.The problem mentioned above has not been met in soft rockmasses.The me- chanical parameter used in calculations——the Young's modules(E) should be measured and selected accurately,where the Poisson's ratio(v)varies through a narrow span of range and it has an ineonsidrable effect on the evaluation of stress tensir,so the value v can be selected approximately refering to the relevent information.