西峪煤矿井下玻璃纤维增强注浆材料的强度性能研究  

Research on the Strength Performance of Underground Grouting Material Reinforced by Glass Fiber in Xiyu Coal Mine

作　　者：王晓林[1] 周凯 WANG Xiaolin;ZHOU Kai(Department of Architecture and Environmental Engineering,Taiyuan University,Taiyuan,Shanxi 030032,China;School of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原学院建筑与环境工程系,山西太原030032 [2]太原理工大学土木工程学院,山西太原030024

出　　处：《矿业研究与开发》2024年第3期220-224,共5页Mining Research and Development

基　　金：山西省高等学校教学改革创新项目(J2021773);太原学院院级科研项目(21TKQ17).

摘　　要：为了提升矿用堵水注浆材料的力学性能,提出采用废弃玻璃纤维进行材料改性。通过开展单轴压缩试验探究了注浆体强度受纤维长度、掺量和养护时间的影响规律,结合损伤分析和微观图像对废弃玻璃纤维的增强机理进行探讨。结果表明:掺入玻璃纤维使注浆体的抗压强度和延性显著提高;抗压强度的增长速度随养护时间增加而下降,3d内增长速率较快,3d后趋于稳定;玻璃纤维长度对强度影响显著,短切纤维对强度增长贡献值最高;随着纤维掺量增加,强度指标呈先增后减的变化规律,当纤维掺量为0.3%~0.4%时达到最大;纤维在水泥胶砂中的桥接效应可抑制压缩裂缝的扩展,对试件破坏起到缓冲作用;当玻璃纤维的长度过大或掺量过高时会增加局部区域的孔隙率,使矿用堵水注浆体的变形和强度性能发生弱化。For improving the mechanical properties of waterproof grouting material,waste glass fiber was proposed to modify the material.Through uniaxial compression test,the law of the strength of the grouting body affected by fiber length,fiber content and curing time was investigated.The strengthening mechanism of waste glass fiber was discussed by combining damage analysis and microscopic images.The results show that the addition of glass fiber significantly improves the compressive strength and ductility of the grouting body.The growth rate of strength decreases with the increase of curing time,the growth rate is fast within 3days,and tends to be stable after 3days.The glass fiber length has a significant effect on the strength,and the short fiber has the highest contribution to the strength growth.With the increase of fiber content,the strength index increases first and then decreases,and reaches the maximum when the fiber content is 0.3%-0.4%.The bridge effect of fiber in cement mortar can inhibit the expansion of compression cracks and buffer the failure of specimens.When the length of glass fiber is too large or the content is too high,the porosity of local area will be increased,and the deformation and strength of mine water plugging and grouting will be weakened.

关 键 词：玻璃纤维 矿山防治水 注浆材料 注浆体强度 微观机理 

分 类 号：TD528[矿业工程—矿山机电]