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岩盐水力压裂的破裂判据
引用本文:肖长富,阳友奎,等.岩盐水力压裂的破裂判据[J].重庆大学学报(自然科学版),1992,15(6):78-84.
作者姓名:肖长富  阳友奎
作者单位:重庆大学资源及环境工程系 (肖长富,阳友奎,吴刚,邱贤德),重庆大学资源及环境工程系(周时光)
摘    要:岩盐的基本力学特性和破坏特征的实验结果表明,岩盐是一种“杨氏模量/强度(E/S)”比值极低的特殊软岩,其破坏遵循变形破坏准则,根据最大拉应变强度理论建立了岩盐水力压裂时计入铅直应力效应的破裂判据,并建议一般应采用单轴压缩实验来确定临界拉应变值,该判据与实验结果极为一致,适应于各种应力状态政下任何具有较小E/S比值的软岩。

关 键 词:岩盐力学  水力压裂  破裂  判据

A THEORETIC BREAKDOWN CRITERION OF HYDROFRACTURING IN ROCK SALT
Xiao Changfu YangYoukui Wu Gang Qiu Xiande Zhou Shiguang.A THEORETIC BREAKDOWN CRITERION OF HYDROFRACTURING IN ROCK SALT[J].Journal of Chongqing University(Natural Science Edition),1992,15(6):78-84.
Authors:Xiao Changfu YangYoukui Wu Gang Qiu Xiande Zhou Shiguang
Institution:Xiao Changfu YangYoukui Wu Gang Qiu Xiande Zhou Shiguang
Abstract:Experimental results of the basic mechanical properties and failure mode performed on rock salt demonstrate that rock salt is a typical and peculiar soft rock , whose" Young' s modulus/strength(E/S)"ratio is extremely small,and whose failure follows the deformation failure criterion. With these results,this paper develops a theoretic breakdown criterion of hydraulic fracturing in rock salt,which is based on the greatest tension strain failure theory and includes the vertical stress effects. It has been suggested that the critical tension strain should be determined from uniaxial compression tests. This theoretic criterion exceedingly agrees with experimental results and is applicable for every soft rock with small E/S ratio under various stresses.
Keywords:rock salt mechanics  hydrofracturing  breakdown criterion  vertical stress ef-fects
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