CAJ | 학술논문

对不同温度下(20℃～700℃)及高温后(100℃后，200℃后)喜马拉雅山盐岩进行单轴压缩破坏试验，获得其受高温作用的力学特征和破坏形态，探讨峰值应力、峰值应变和弹性模量的变化规律，并重点分析高温下其应力-应变曲线的特殊性。研究结果如下：当温度低于120℃时，盐岩的抗压强度和弹性模量随温度的升高而降低，120℃～200℃时，随温度的升高而增加；在较高温度下(500℃及以上)，盐岩的内部结构发生突变，峰值应力大大降低；盐岩的应力-应变曲线在不同温度区间有较大差异，170℃是其发生突变的阈值；当温度为170℃～400℃时，盐岩呈现出明显的应变硬化特性；喜马拉雅山盐岩所能承受的极限温度不超过700℃；与同等高温下相比，经历100℃和200℃高温后的盐岩，其承载能力降低，变形及弹性模量较小，其内部出现较多裂纹，整体性较差。
대불동온도하(20℃～700℃)급고온후(100℃후，200℃후)희마랍아산염암진행단축압축파배시험，획득기수고온작용적역학특정화파배형태，탐토봉치응력、봉치응변화탄성모량적변화규률，병중점분석고온하기응력-응변곡선적특수성。연구결과여하：당온도저우120℃시，염암적항압강도화탄성모량수온도적승고이강저，120℃～200℃시，수온도적승고이증가；재교고온도하(500℃급이상)，염암적내부결구발생돌변，봉치응력대대강저；염암적응력-응변곡선재불동온도구간유교대차이，170℃시기발생돌변적역치；당온도위170℃～400℃시，염암정현출명현적응변경화특성；희마랍아산염암소능승수적겁한온도불초과700℃；여동등고온하상비，경력100℃화200℃고온후적염암，기승재능력강저，변형급탄성모량교소，기내부출현교다렬문，정체성교차。
The uniaxial compression tests for Himalayas salt rock under different temperatures(20 ℃-700 ℃) and after high temperatures(after 100 ℃ and 200 ℃) were conducted to study mechanical characteristics and failure models. The variations of peak stress,peak strain and elastic modulus were analyzed,and especially focusing on the characteristics of stress-strain curves under high temperature. The research results show that,when the temperature is below 120 ℃,the compression strength and elastic modulus of salt rock decrease with temperature increasing,but increase when the temperature changes from 120 ℃ to 200 ℃. Under higher temperatures such as 500 ℃ or above,the internal structure of salt rock changes and the peak stress greatly reduces. The stress-strain curves of salt rock are quite different in different temperature ranges and 170 ℃ is a threshold temperature. When the temperature is 170 ℃-400 ℃,brittle characteristics no longer appears and salt rock shows significant strain hardening with increasing temperature. The limit temperature that Himalayas salt rock can withstand does not exceed 700 ℃. The carrying capacity of samples after high temperature of 100 ℃ and 200 ℃ is relative lower.Simultaneously,its deformation and elastic modulus are lower. There are more cracks and the integrity is inferior.