岩体物理模拟实验中的相似材料配比  

Proportioning of Similar Materials in Rock Physical Simulation Experiments

作　　者：牛耀 苏占东 孙进忠[3] 张昊 吴雪丽 林淇七 王鸷文 李梓檬 朱焕欣 张建勇 梁金平 Niu Yao;Su Zhandong;Sun Jinzhong;Zhang Hao;Wu Xueli;Lin Qiqi;Wang Zhiwen;Li Zimeng;Zhu Huanxin;Zhang Jianyong;Liang Jinping(Department of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,Hebei,China;Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment,Sanhe 065201,Hebei,China;School of Engineering and Technology,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]防灾科技学院地质工程学院,河北三河065201 [2]河北省地震灾害防御与风险评价重点实验室,河北三河065201 [3]中国地质大学(北京)工程技术学院,北京100083

出　　处：《吉林大学学报（地球科学版）》2024年第5期1645-1656,共12页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(41807270);中央高校基本科研业务费专题研究重点项目(ZY20215113);防灾科技学院研究生创新基金项目(ZY20230311)。

摘　　要：为确定岩体物理模拟实验中常见相似材料的配比,首先选取河砂、重晶石粉、石膏和水泥四种原料,采用正交设计的方法,设置骨胶比(河砂和重晶石粉质量与石膏和水泥质量之比)、水膏比(水泥质量与石膏质量之比)和重晶石掺量(重晶石粉质量与骨料质量之比)3个因素,每个因素5个水平,开展单轴压缩情况下的密度试验和声发射试验,然后确定不同配比对相似材料物理力学指标和表征损伤程度指标(D)的敏感性。试验结果表明:在骨胶比影响下,相似材料密度、抗压强度和弹性模量的极差最大,分别为0.13 g/cm^(3)、2.60 MPa和247 MPa,F检验值最大,显著性最高;在重晶石掺量影响下,泊松比的极差最大,为0.09,同样显著性最高;在骨胶比影响下D的极差最大,为0.25,显著性最高。总的来说,骨胶比对相似材料密度、抗压强度、弹性模量和D起控制作用,重晶石掺量对泊松比起控制作用;重晶石掺量最优为20%。In order to determine the ratio of similar materials commonly used in physical simulation experiments,four raw materials including river sand,barite powder,gypsum and cement were selected,and orthogonal design was adopted.Bone glue ratio(ratio of river sand mass and barite powder mass to gypsum mass and cement mass),water-paste ratio(ratio of cement mass to gypsum mass)and barite content(ratio of barite powder mass to aggregate mass),with five levels for each factor,were set to carry out density test and acoustic emission test under uniaxial compression.The sensitivity of different proportions to the physical and mechanical indexes of similar materials and the indexes of damage degree were determined.The experimental results show that the density,compressive strength and elastic modulus of similar materials under the influence of bone glue ratio have the largest range,which are 0.13 g/cm^(3),2.60 MPa and 247 MPa,respectively,F-test has the largest value,and the significance is the highest.Poisson’s ratio has the largest range under the influence of barite content,which is 0.09,and has the highest significance.The relative cumulative damage degree(D)had the largest range(0.25)under the influence of bone glue ratio,and the F test value was the most significant.In general,the bone glue ratio controls the density,compressive strength,elastic modulus and D of similar materials.

关 键 词：物理模拟实验 相似材料 正交设计 敏感性 损伤特征 

分 类 号：TU45[建筑科学—岩土工程]