玄武岩纤维增强尾砂胶结充填体的力学性能及破坏形态  

Mechanical Properties and Damage Morphology of Tailing Sand Cemented Filler Reinforced with Basalt Fibers

作　　者：张耀平[1,2] 陈荣森 王瑞 雷大星 ZHANG Yaoping;CHEN Rongsen;WANG Rui;LEI Daxing(School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Resource and Construction Engineering,Gannan University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]赣南科技学院资源与土木工程学院,江西赣州341000

出　　处：《有色金属(中英文)》2025年第3期484-496,共13页Nonferrous Metals

基　　金：国家自然科学基金资助项目(52364018)。

摘　　要：以安庆铜矿为工程背景,为了探究玄武岩纤维对尾砂胶结充填体力学性能以及破坏形态的的影响,采用万能试验机对掺玄武岩纤维尾砂胶结充填体进行单轴加载试验。采用SEM对充填体试样进微观检测。结果表明:充填体的单轴抗压强度及抗拉强度均随纤维含量和纤维长度的增加而呈现先增后减的趋势,最佳纤维掺量为0.6%,最佳纤维长度为9 mm。适量的掺入玄武岩纤维能够有效抑制充填体试样破坏主裂缝的产生,同时降低其破裂面的范围。微观测试结果表明:掺入玄武岩纤维后充填体内部原生孔隙减少,纤维发挥阻裂作用及桥接作用,内部黏结力增强,充填体力学性能得以提高。Taking Anqing copper mine as the engineering background,in order to investigate the effect of basalt fiber on the mechanical properties and failure pattern of the tailing sand cemented filling body,a universal testing machine was used to carry out uniaxial loading test on the tailing sand cemented filling body doped with basalt fiber.Secondly,scanning electron microscope was used for microscopic inspection of the specimens.The results showed that the uniaxial compressive strength and tensile strength of the filling body with the increase of fiber content and fiber length showed a trend of increasing and then decreasing,the best fiber doping was 0.6%,the best fiber length was 9 mm.the appropriate amount of doped basalt fibers can effectively inhibit the filling body specimen damage to the generation of the main cracks,and at the same time,reduce the range of its rupture surface.The microscopic test results showed that after doping basalt fibers,the primary pores inside the filling body were reduced.The fibers play the role of crack-blocking and bridging,the internal bonding force is enhanced,and the mechanical properties of the filling body are improved.

关 键 词：玄武岩纤维 力学性能 微观测试 破坏形态 

分 类 号：TD853.34[矿业工程—金属矿开采] TD325[矿业工程—矿山开采]