超声波作用增强水泥基充填体力学性能和料浆流变性能的研究  

Study on the Enhancement of Mechanical Properties of Cement-Based Filling Body and Rheological Properties of Slurry by Ultrasonic Action

作　　者：沈彬彬 温瑶华 吴煜 SHEN Binbin;WEN Yaohua;WU Yu(Minnan University of Science and Technology,Quanzhou,Fujian 362000,China;School of Civic Engineering&.Transportation,South China University of Technology,Guangzhou,Guangdong 510640,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;China Construction Eighth Engineering Division Corp.,Ltd.,Shanghai 200122,China)

机构地区：[1]闽南理工学院,福建泉州市362000 [2]华南理工大学土木与交通学院,广东广州510640 [3]同济大学土木工程学院,上海200092 [4]中国建筑第八工程局有限公司,上海200122

出　　处：《矿业研究与开发》2025年第4期46-54,共9页Mining Research and Development

基　　金：国家自然科学基金项目(52108240)。

摘　　要：针对水泥基充填体抗压强度低、充填成本高、充填效果差的技术瓶颈,采用超声波技术改善水泥基充填料浆的性能,通过开展三因素四水平的正交试验,探究超声功率、超声时间和搅拌时间对水泥基充填料浆流变性能和力学性能的影响,并进一步探讨超声作用的强化机理。研究结果表明:影响充填体抗压强度的因素主次排序为超声功率、超声时间、搅拌时间,超声功率是影响充填料浆屈服应力和塑性黏度的显著性因素,搅拌时间次之,超声时间影响最小;充填体3 d、7 d、14 d和28 d抗压强度随着超声功率、超声时间和搅拌时间的增加均表现出先上升后降低的变化趋势,当超声功率、超声时间和搅拌时间分别为70 W、4 min和6 min时,充填体抗压强度达最优值;充填料浆屈服应力和塑性黏度与超声功率和超声时间均成负相关,而随着搅拌时间的延长呈先降低后增加的变化趋势。这是由于超声作用促进了液相中水泥和尾砂颗粒的分散,提高了浆体均匀性,促进了水泥水化进程;然而过高的超声功率和过长的超声时间导致水泥颗粒絮凝结构重聚,抑制水分子的扩散和浆体结构密实;适宜的搅拌时间有利于浆体分散,削弱颗粒间的摩擦和剪切作用,而过长的搅拌时间导致浆体结构被破坏,削弱了充填体的力学性能。Aiming at the technical bottleneck of low compressive strength,high filling cost and poor filling effect of cement-based filling body,ultrasonic technology was used to improve the performance of cement-based filling slurry.Through the orthogonal tests of three factors and four levels,the effects of ultrasonic power,ultrasonic time and stirring time on the rheological properties and mechanical properties of cement-based filling slurry were investigated,and the strengthening mechanism of ultrasonic action was further discussed.The research results indicate that the primary and secondary factors affecting the compressive strength of the filling body are ultrasonic power,ultrasonic time and stirring time.Ultrasonic power is a significant factor affecting the yield stress and plastic viscosity of the filling slurry,followed by stirring time,and ultrasonic time has the smallest impact.The compressive strength of the filling body at 3 days,7 days,14 days and 28 days shows a trend of first increasing and then decreasing with the increase of ultrasonic power,ultrasonic time and stirring time.When the ultrasonic power,ultrasonic time and stirring time are 70 W,4 min and 6 min,respectively,the compressive strength of the filling body reaches its optimal value.The yield stress and plastic viscosity of the filling slurry are negatively correlated with ultrasonic power and ultrasonic time,and show a trend of first decreasing and then increasing with the extension of stirring time.This is because the ultrasonic action promotes the dispersion of cement and tailings particles in the liquid phase,improves the uniformity of the slurry,and promotes the cement hydration process.However,excessive ultrasonic power and prolonged ultrasonic time lead to the reunion of the flocculation structure of cement particles,which inhibits the diffusion of water molecules and the compactness of the slurry structure.The appropriate stirring time is beneficial to the dispersion of the slurry and weakens the friction and shear between the particles,wh

关 键 词：超声波 胶结充填体 正交试验 抗压强度 流变性能 

分 类 号：TD853.34[矿业工程—金属矿开采]