摘要
为了研究高水速凝材料作为采空区充填体是否具有长期、有效控制上覆岩层移动变形的能力,对高水速凝材料进行了瞬时物理力学试验和微观扫描分析,及利用重力连续加载方式进行了干燥和水环境中的蠕变试验,根据蠕变试验曲线进行了高水速凝材料的流变模型辨识和参数反演。结果表明:高水速凝材料在空气环境中容易丧失强度,水环境条件工作更利于提高其自身结构和承载力的稳定性;高水速凝材料的长期蠕变稳定性取决于荷载水平是否达到其材料的长期屈服强度;Burgers流变模型能更好地描述水环境中高水速凝材料这种"类"软岩的蠕变特性。
In order to study whether the high-water rapid-setting material( HRM) have the ability to control the strata movement chronically and effectively,transient mechanical tests and microscopic scanning were performed on HRM. HRM creep experiments in air environment and water environment were conducted through continuously gravitational loading way. At the same time,based on creep experiments,the rheological model and rheological parameters of HRM were identified. The results of creep experiments and rheological identification showed that the strength of HRM will be reduced in air environment,and water environment is beneficial for its strength reinforcement. The creep behavior stability of RHM is determined by whether its loading level is above or below its yield stress. The creep law of HRM in water environment can be better simulated by the Burgers model.
出处
《四川大学学报（工程科学版）》
EI
CSCD
北大核心
2014年第3期1-6,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(51134018)
关键词
水环境
高水速凝材料
蠕变试验
蠕变特性
流变模型
water environment
high-water rapid-setting material(HRM)
creep experiment
creep law
rheological model
