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纤维含量-浓度效应下尾砂胶结材料受压性能响应

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为推动纤维增强尾砂胶结材料(FRCM)在工程中的应用,研究分析了混合纤维(玻璃纤维与聚丙烯腈纤维的混合物)含量与浓度耦合效应下FRCM的力学性能变化规律.通过单轴压缩试验得到纤维质量含量为0％,0.5％,0.7％和料浆浓度为65％,68％,72％的FRCM抗压强度和弹性模量,并提出以极限应变因子K来评价FRCM的抗压韧性.研究结果表明:浓度是影响FRCM强度的关键,浓度为65％时,FRCM抗压强度随纤维含量增加而增加的增长率最大,并在一定纤维含量条件下有良好的提升空间;纤维含量是影响FRCM抗压韧性的关键,浓度为68％时,FRCM的K值增幅较大,体现出良好的抗压韧性性能;当浓度为65％时,FRCM的弹性模量随纤维含量增加而增加的增长率相对稳定.
Response of compressive properties of cemented tailings material under the coupling effect of fiber content and concentration
To promote the application of fiber reinforced cemented tailings material(FRCM)in engi-neering field,variation law of the mechanical properties of FRCM under the coupling effect of fibers(a mixture of glass fiber and polyacrylonitrile fiber)content and concentration were investigatd.The com-pressive strength and elastic modulus of FRCM were obtained by uniaxial compression test under varied fiber content of 0％,0.5％and 0.7％and varied concentration of 65％,68％and 72％,and the ultimate strain factor K was proposed to evaluate the compressive toughness of FRCM.The results showed that concentration was the key to influence the strength of FRCM.With the increase of fiber content,the compressive strength of FRCM increased,and the increase rate reached its maximum value when the concentration reached 65％.It had further improvement space under certain fiber contents,too.The fiber content of FRCM had a significant impact on its compressive toughness,the K value of FRCM increased significantly when the concentration was 68％and it showed favorable compressive toughness.FRCM's elastic modulus increased with fiber content,but the increase tended to stay relatively stable as the con-centration reached 65％.

fiber reinforced cemented tailings materialfiber contentconcentrationcompressive strengthelastic moduluscompressive toughness

赵康、赵康奇、严雅静、杨健、敖文强、肖维灵

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生态环境部固体废物与化学品管理技术中心,北京 100029

江西理工大学土木与测绘工程学院,江西 赣州 341000

中国矿业大学(北京)能源与矿业学院,北京 100083

纤维增强尾砂胶结材料 纤维含量 浓度 抗压强度 弹性模量 抗压韧性

国家自然科学基金项目国家自然科学基金项目江西省主要学科学术和技术带头人培养计划领军人才项目江西省自然科学青年重点基金项目江西省教育厅科技项目

523741385176401320204BCJ2200520192ACBL21014GJJ180503

2024

10.13545/j.cnki.jmse.2022.0462

采矿与安全工程学报
中国矿业大学 中国煤炭工业劳动保护科学技术学会

采矿与安全工程学报

CSTPCD北大核心
影响因子：2.054
ISSN：1673-3363
年,卷(期)：2024.41(3)