【摘要】 通过有限元法计算,得出偏心钻孔在围压作用下的应力分布,讨论了由于"偏心"导致率定的换算公式失准,表明小孔孔壁应变和位移随"偏心"增大而显著改变。利用保角变换以实例对压磁法偏心钻孔的地应力测量数据进行了修正,对比同一钻孔相近深度上基本不偏心的测量结果,表明修正后二着相当吻合。更多还原

【Abstract】 In this paper, analytical result of strain and displacement in small hole inner wall are made out, and the error between deviation and no deviation is discussed, it shows the error obviously increases with declination of small hole strain and displacement. In this paper, When d=30mm, strain deviation is 30%, and hole diameter deviation is 28%. Maintenance angle transformation is used to change two-deviation circles boundary into regular boundary in calculation, and the measured data in crustal stress piezomagnetic measurement are corrected.更多还原