岩石弹性模量试验研究

The Experimental Study of the Elastic Modulus on the Rock

岩石的石质坚硬、密度大,在弹性范围内应变极其微小,因此岩石弹性模量的检测技术要求高、难度大,其数据的准确性往往难以把握。本次试验介绍了电阻应变片法测定岩石弹性模量的步骤,选取同一批直径50mm、高径比2∶1的圆柱形天然花岗岩样品,10次试验的结果为40.8GPa,千分表法比对试验的结果为39.8GPa,在试验误差范围内,可认为两者数据是一致的。

There is a very small deformation within the scope of the elastic for the rock since it is hard and high density. Therefore,the experiment of rock elastic modulus has got high technical requirements and very difficult. The accuracy of the experimental data is often difficult to obtain as well. This paper introduces the experimental steps of rock elastic modulus by using the method of resistance strain gauge. The same type of cylindrical and natural granite,which diameter is 50mm and the ratio of height to diameter is 2:1 were selected as samples. The average value of the 10 times test is 40.8GPa compared with 39.8GPa when using dial gauge. Thus,there comes an conclusion that both results are consistent within the range of experimental error.