CAJ | 학술논문

基于伯格斯（M-K）蠕变模型，根据三维压缩蠕变实验条件，建立了层状盐岩轴向蠕变本构方程；推导出各单层岩性蠕变参数与整个层状盐岩样的蠕变参数关系表达式；同时，在建立层状盐岩径向蠕变本构方程的基础上，推导出层状盐岩各岩层由于蠕变变形差异产生的附加力求解公式；依据淮安库区某层状盐岩蠕变实验数据对所得到的结果进行了部分验证。研究表明，层状盐岩的蠕变破坏是岩层由于蠕变变形差异产生附加力与其作用方向上应力共同作用的结果，只有当其合应力超过夹层抗拉强度时，才会使盐岩夹层发生张拉破坏。研究结果为层状盐岩体中地下盐穴储气库的长期稳定性评价提供了理论分析基础。
기우백격사（M-K）연변모형，근거삼유압축연변실험조건，건립료층상염암축향연변본구방정；추도출각단층암성연변삼수여정개층상염암양적연변삼수관계표체식；동시，재건립층상염암경향연변본구방정적기출상，추도출층상염암각암층유우연변변형차이산생적부가력구해공식；의거회안고구모층상염암연변실험수거대소득도적결과진행료부분험증。연구표명，층상염암적연변파배시암층유우연변변형차이산생부가력여기작용방향상응력공동작용적결과，지유당기합응력초과협층항랍강도시，재회사염암협층발생장랍파배。연구결과위층상염암체중지하염혈저기고적장기은정성평개제공료이론분석기출。
The emergence of deformation incompatibility arising from different creep properties of pure and interbedded salt rocks maylead to the deterioration of mechanical properties of bedded salt rocks,which has a significant impact on the stability and safe opera-tion of salt-cavern gas storage.Based on the Burgers (MK)creep model,we established an axial creep constitutive equation of bed-ded salt rocks for the three-dimensional compression creep test conditions,and deduced a relational expression for creep parametersof each individual rock bed and the whole bedded salt rocks.Meanwhile,on the basis of the radial creep constitutive equation of bed-ded salt rocks,a solution formula for the additional stress arising from the creep deformation difference of bedded salt rocks was alsodeduced and the results obtained were partially verified by creep test data derived from a salt-rock bed in the Hua'ian reservoir area.Studies have shown that the creep damage of bedded salt rocks results jointly from the additional stress arising from the creep de-formation difference and the stress in the same direction of the effect.Only when this co-stress exceeds the interlayer tensilestrength,can an interlayer tensile failure of salt rocks happen.The results will provide a theoretical foundation for evaluating thelong-term stability of underground salt cavern gas storage in bedded salt rocks.