【摘要】 蠕变损伤是岩盐的主要的破坏形式之一,为此对长山盐矿和乔后盐矿进行了蠕变试验研究,通过试验结果分析得出岩盐蠕变模型。对两种岩盐试件在裂纹的产生、发展直至破坏过程中产生的差别进行了分析,其产生差别的原因主要是岩盐晶粒结晶过程中受地质、环境等因素的影响,使得晶粒内部存在着大量的缺陷,晶粒之间的交界面极不规则,这时位错在这些晶体内占有重要地位,位错就控制了该晶粒的力学性质;其次是两种岩盐中NaCl的含量、晶粒大小、晶粒之间的胶结不同,造成两种岩样在蠕变过程中表现的现象不同,其岩盐力学性质也有差异。更多还原

【Abstract】 Creep damage is one of the main failure types of rock sal t, so the creep experiment of Changshan and Qiaohou rock salt is carried out and cr eep model of rock salt is built up based on the analy-sis of the experiment res ults.There are some differences in the generation,expansion of rocks and the fai lure of rock salt between two rock salt samples attributing to geology and envir onmental factors during the crys-tallisation.Thus the dislocation takes the mai n effect and controls the mechanical characteristics of crystal grain.At the sam e time,the NaCl content,crystal grain size and cohesion between crystal grains a ffect the creep characteristics and result in that rock salt behaves different m echanical characteristics.更多还原