基于正交试验的砂岩相似材料力学性能研究  

Research on Mechanical Properties of Similar Materials of Sandstone Based on Orthogonal Test

作　　者：夏婷 代张音[1] 蒙文富 陈有成 XIA Ting;DAI Zhangyin;MENG Wenfu;CHEN Youcheng(Mining College,Guizhou University,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025

出　　处：《矿业研究与开发》2024年第5期142-148,共7页Mining Research and Development

基　　金：国家自然科学基金项目(52264005);贵州大学实验室开放项目(SYSKF2023-058)。

摘　　要：砂岩相似模拟试验在矿业、土木等领域中应用广泛,为确定砂岩相似材料的配比方案,应用正交设计方法,以河砂/重晶石粉、石膏/水泥、胶结材料/骨料的质量比设置3因子3水平正交试验,对不同配比的试样开展单轴抗压试验、环剪试验,测得每组配比的抗压强度、黏聚力、内摩擦角,研究各参数与正交设计3因子之间的变化规律。基于测试数据,得出以下结论:(1)砂岩相似材料的应力-应变曲线与一般岩石的规律基本相同;(2)对单轴抗压强度起主导作用的是胶结材料与骨料比,试样破坏形态以拉伸-剪切复合失效为主;(3)对黏聚力和内摩擦角起主导作用的是胶结材料与骨料比,环剪试样破坏后发生脆性断裂,且伴有碎石脱落。研究提供了9种相似材料设计配比,可根据需要选择合适的相似材料。Sandstone similarity simulation test is widely used in mining,civil engineering and other fields.In order to determine the proportioning scheme of similar materials of sandstone,the orthogonal design method was used to set up a three-factor and three-level orthogonal test with the mass ratio of river sand to barite powder,gypsum to cement and cementing material to aggregate.Uniaxial compression tests and ring shear tests were conducted on specimens with different proportions,and their compressive strength,cohesion,and internal friction angle were measured.The variation law between each parameter and the three-factors of the orthogonal design was studied.Based on test data,it can be concluded that the stress-strain curves of similar materials of sandstone are basically the same as those of general rocks.The ratio of cementing materials to aggregates plays a dominant role in the uniaxial compressive strength,and the failure mode of the specimen is mainly tensile-shear composite failure.The ratio of cementing materials to aggregates plays a dominant role in cohesion and internal friction angle.Brittle fracture occurs after the failure of ring shear specimen,accompanied by gravel falling off.The research provides 9 kinds of similar material design proportions,and the appropriate similar materials can be selected according to the needs.

关 键 词：砂岩 相似材料 力学性能 正交试验 环剪试验 

分 类 号：TD315[矿业工程—矿井建设]