摘要
通过对不同温度、压力实验条件下，不同煤级煤的应力—应变曲线特征分析，探讨了不同煤化程度煤的变形行为及其影响因素，论述了温度和压力在不同煤级和不同实验条件下具有的不同作用。在中煤级阶段，虽然围压的增大可在一定程度上提高煤的强度，但温度的影响更为重要。较高煤级在小应变阶段，温度起主导作用；而到了大变形阶段，围压的作用又逐渐上升到主导地位。此外，在一定的条件下，煤中气体的产生和释放对煤的变形行为具有显著影响。
The deformation behaviour of different ranks of coal was discussed based on characteristics of stress and strain curves of coals tested under different temperature and confining pressure.Temperature and confining pressure are considered to be two important influencing factors.In the middle stage of coal metamorphism increase of the confining pressure will increase to a certain extent the strength of coal.However,the influence of temperature is even more important.For high rank of coal,the temperature is predominant in the stage of low strain,and the confining pressure will gradually become predominant in the stage of high strain.In addition,under specific conditions the gas produced and released from coal will greatly affect the deformation behaviour of coal.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1999年第1期13-15,共3页
Coal Geology & Exploration
基金
国家自然科学基金
关键词
煤
高温
高压
应力-应变图
实验分析
coal
high temperature
high pressure
stress strain diagrams
laboratory studies
