Abstract：In the model experiment，its authenticity will be affected by the composition and mix ratio of the simulated material. In this paper，first，based on the similarity theory and considering the dead weight of the model，the target value of the simulated material is determined. Then，on the basis of previous studies，materials such as sand，cement，gypsum，diatomite，red clay and marl powder are selected. Finally，the compressive strength and density are taken as the key control to conduct the preliminary experiment and the appropriate group is selected for the follow-up experiment. It is concluded that when the prototype rock mass is in medium or weak weathering state but has high compressive strength，it is advisable to choose the scheme with high proportion of cementing materials and low proportion of sand. When the prototype rock mass is in the state of strong weathering but has low compressive strength，it is advisable to choose the scheme with high proportion of sand，high proportion of regulating material and low proportion of cementing material. Changing the content of diatomite and marl powder in the material has a significant influence on the internal friction angle of the simulated material. Increasing the content of red clay can slightly improve the cohesion of the simulated material. By changing the proportion of each material，the physical characteristics in different weathering states of the same prototype rock mass can be simulated more accurately. The credibility of subsequent model experiments can be improved.
刘永莉，周文佐，郭 斌，马 强，肖衡林. 相似模型实验中泥灰岩相似材料研究[J]. 岩石力学与工程学报, 2020, 39(S1): 2795-2803.
LIU Yongli，ZHOU Wenzuo，GUO Bin，MA Qiang，XIAO Henglin. Study on marl similar materials in similar simulation test. , 2020, 39(S1): 2795-2803.
陈安敏，顾金才，沈 俊，等. 地质力学模型实验技术应用研究[J].岩石力学与工程学报，2004，23(22)：3 785–3 789.(CHEN Anmin，GU Jincai，SHEN Jun，et al. Application of geomechanical model test technology[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(22)：3 785–3 789.(in Chinese))
[3]
雷 勇，尹君凡，陈秋南，等. 基于极限分析法的溶洞顶板极限承载力研究[J]. 岩土力学，2017，38(7)：1 926–1 932.(LEI Yong，YIN Junfan，CHEN Qiunan，et al. Study on ultimate bearing capacity of karst roof based on limit analysis method[J]. Rock and Soil Mechanics，2017，38(7)：1 926–1 932.(in Chinese))
[5]
黄 明，付俊杰，陈福全，等.桩端荷载与地震耦合作用下溶洞顶板的破坏特征及安全厚度计算[J]. 岩土力学，2017，38(11)：3 154–3 162.(HUANG Ming，FU Junjie，CHEN Fuquan，et al. Fault characteristics and safe thickness calculation of karst roof under coupling of pile end load and earthquake[J]. Rock and Soil Mechanics，2017，38(11)：3 154–3 162.(in Chinese))
[7]
韩伯鲤，陈霞龄，宋一乐，等. 岩体相似材料的研究[J]. 武汉水利电力大学学报，1997，30(2)：7–10.(HAN Boli. CHEN Xialing. SONG Yile，et al. Research on similar material of rockmass[J]. Journal of Wuhan University of Hydraulic and Electric Engineering，1997，30(2)：7–10.(in Chinese))
[10]
李晓红，卢义玉，康 勇，等. 岩石力学实验模拟技术[M]. 北京：科学出版社，2007：6–24.(LI Xiaohong，LU Yiyu，KANG Yong，et al. Experimental simulation technology of rock mechanics[M]. Beijing：Science Press，2007：6–24.(in Chinese))
[11]
中华人民共和国国家标准编写组. GBT50266—2013工程岩体实验方法标准[S]. 北京：中国计划出版社，2013.(The National Standards Compilation Group of People?s Republic of China. GBT50266—2013 Standards for engineering rock mass test methods[S]. Beijing：China Planning Press，2013.(in Chinese))
[2]
赵明华，唐咸力，肖 尧，等. 考虑厚跨比的基桩下伏溶洞顶板冲切特性实验研究[J]. 岩土力学，2018，39(4)：1 159–1 167.(ZHAO Minghua，TANG Xianli，XIAO Yao，et al. Experimental study on the punching characteristics of the roof of the cave under the pile with thick-span ratio[J]. Rock and Soil Mechanics，2018，39(4)：1 159–1 167.(in Chinese))
[4]
江 松，黄 明，付俊杰，等. 岩溶桩基振动台实验中岩体相似材料的配比研究[J]. 工程地质学报，2017，25(3)：671–677.(JIANG Song，HUANG Ming，FU Junjie，et al. Study on the proportion of rock mass similar materials in the shaking table test of karst pile foundation[J]. Journal of Engineering Geology，2017，25(3)：671–677.(in Chinese))
[6]
FUMAGALLI E. 静力学模型与地力学模型[M]. 北京：中国水利电力出版社，1979：114–126.(FUMAGALLI E. Statics and mechanics modal[M]. Beijing：China Water Power Press，1979：114–126.(in Chinese))
[8]
马芳平，李仲奎，罗光福. NIOS模型材料及其在地质力学相似模型实验中的应用[J]. 水利发电学报，2004，23(1)：48–52.(MA Fangping，LI Zhongkui，LUO Guangfu. NIOS model material and its application in geomechanical similarity model test[J]. Journal of Hydroelectric Engineering，2004，23(1)：48–52.(in Chinese))
[9]
张强勇，李术才，郭小红，等. 铁晶砂胶凝新型岩土相似材料的研制及其应用[J]. 岩土力学，2008，29(8)：2 126–2 130.(ZHANG Qiangyong，LI Shucai，GUO Xiaohong，et al. Development and application of new geotechnical similar materials for iron-crystal sand cementation[J]. Rock and Soil Mechanics，2008，29(8)：2 126–2 130.(in Chinese))
2020, Vol. 39 
