摘要
基于深埋隧洞围岩岩爆模拟实验的需要,以锦屏大理岩为工程背景,采用石英砂、重晶石砂、重晶石粉、松香和酒精研制了一种新型的以松香作为胶结剂的岩石相似材料。通过多次试配总结了相似材料的制备方法,以粗细骨料质量比例和松香用量2个参数为主要变量,制作了16组不同配比的试样,开展了单轴压缩实验,并测算了试样的重度。实验结果表明,相似材料的抗压强度和弹性模量受松香用量的影响较大,拟合得到了抗压强度-松香掺量关系式,并计算得到了模拟锦屏大理岩的材料配比。为提高相似材料的适用性,对材料比重和弹性模量的调整方法进行讨论得出,可以将重晶石砂替换为石英砂以调节材料重度,在材料中掺入少量的硅油或橡胶粉,可以调节其弹性模量。
Geo-mechanical model test is a basic measure in the study of disaster prevention and mitigation for underground engineering.A proper equivalent material coincident with similarity theory plays an important role in model test.In order to conduct rock blasting model test,a resin-based equivalent material was developed based on the property of Jinping marbles.The components of this equivalent material are quartz sand,barite sand,barite powder,resin and alcohol.The material＇s preparation method was obtained.Sixteen groups of samples with different matching were manufactured.The most important physical and mechanical parameters,including bulk density,uniaxial compressive strength and elasticity modulus,were tested.The results show that uniaxial compressive strength and elasticity modulus are mainly influenced by the amount of resin.The more the resin is,the larger the uniaxial compressive strength（or elasticity modulus）will be.The relationship between uniaxial compressive strength and the proportion of resin was obtained by fitting experimental data.And the optimum proportion of Jinping marbles＇ equivalent material was found through the relationship.To enlarge the adjustment range of bulk density,barite sand was replaced with quartz sand.With the increase of the replaced proportion,the material＇s bulk density decreases linearly,while uniaxial compressive strength and elasticity modulus remain stable.By this means,resin-based equivalent materials can be widely used in different model tests.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2016年第1期56-61,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家973计划资助项目(2013CB036005)
国家自然科学基金资助项目(51304219)
中国博士后科学基金资助项目(2013M542427)
关键词
锦屏大理岩
相似材料
松香
抗压强度
弹性模量
Jinping marbles
equivalent material
resin
compressive strength
elastic modulus
