摘要
本文利用勒夫数将日、月作用于地球的引潮力位计算到潮汐形变引起的水平应力,以此作为原地标定的已知应力,用应变固体潮观测资料进行调和分析计算出面积应变的耦合系数及差应变的耦合系数,利用这些系数和仪器钢简的弹性常数计算出围岩的等效弹性常数。最后导出了求解围岩等效弹性常数的实用公式,并计算了两种钻孔应变仪所在的两个台站钻孔的围岩的等效弹性常数,其结果与实际情况基本相符。
In relative measurement of crustal stress, in ordel to calculate stress value from and strain value observed in a borehole it is necessary to find out the elastic constant of the rock formation where a strainmeter sensor is situated (including the coupling medium).In this paper horizontal stress caused by tidal deformation will be calculated from tidal generation force potential of the sun and the moon acting on the earth by use of Love Numbers. The stress will be regarded as the known stress in calibration of the same place, the coupling coefficients of area strain and differential strain will be calculated through harmonic analysis of observational data of strain tides. The equivalent elastic constant of the surrounding rock will be calculated by use of these coefficients and the elastic constant of the steel shell of the strainmeter sensor.At last the practical formulas for calculating equivalent elastic constant of surrounding rock have been reduced, The equivalent elastic constants of surrounding rock of the boreholes in two stations where two types of strainmeters have been installed have been calculated. The calculated result basically tallies with the actual condition.
出处
《地壳形变与地震》
CSCD
1989年第4期51-62,共12页
Crustal Deformation and Earthquake
