岩石类材料液压破裂抗拉强度测试理论的修正

CORRECTION OF THEORY FOR TESTING OF TENSILE STRENGTH OF ROCK LIKE MATERIALS BY HYDRAULIC FRACTURING

经典的液压破裂法抗拉强度测试理论把材料视为均质、各向同性的线弹性体然而，岩石类材料实际上具有拉伸弹性模量与压缩弹性模量不相等的变形性质，据此，提出了计算液压破裂抗拉强度的修正公式事实上，破裂压力ｐ不仅与材料的抗拉强度有关。

The classic theory for testing the tensile strength of rock by hydraulic fracturing is to regard the materials as homogeneous,isotropic linear elastomer.However,the rock like material has the deformation properties that the tensile elastic modulus is not equal to compression elastic modulus.Based on this,the corrected formulas for calculation of the tensile strength by hydraulic fracturing is proposed.In fact,the fracturing pressure,p,is not only related to the tensile strength of the material,but also related to the ratio of tensile elastic modulus to the compressive elastic modulus,m.