高寒地区充填体强度与超声波波速关系  

Relationship between strength and ultrasonic wave velocity of backfill in alpine region

在线阅读下载全文

作  者:侯晨[1,2,4] 李磊 魏赫彤[3] 杜加法 潘建达 刘洪磊 HOU Chen;LI Lei;WEI Hetong;DU Jiafa;PAN Jianda;LIU Honglei(Institute of Rock Failure and Instability,Northeastern University,Shenyang 110819,China;Experimental Teaching Center of College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Shandong Gold(Beijing)Industrial Investment Co.,Ltd.,Shandong Gold Mining Co.,Ltd.,Beijing 102209,China;Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources,North China University of Science and Technology,Tangshan 063210,China)

机构地区:[1]东北大学岩石破裂与失稳研究所,沈阳110819 [2]东北大学资源与土木工程学院实验教学中心,沈阳110819 [3]山东黄金矿业股份有限公司山东黄金(北京)产业投资有限公司,北京102209 [4]华北理工大学矿产资源绿色开发与生态修复协同创新中心,唐山063210

出  处:《中国有色金属学报》2025年第4期1416-1428,共13页The Chinese Journal of Nonferrous Metals

基  金:国家自然科学基金资助项目(51904055,52174070);矿产资源绿色开发与生态修复协同创新中心开放基金资助项目(HLCX-2024-02)。

摘  要:为建立寒区低温条件下充填体力学参数与超声波波速间的定量关系,采用非金属超声波检测仪,分析了低、负温养护充填体的超声波波速演化规律及与常温养护充填体在声波传播特性的差异。结果表明:低温条件下(≥0℃),持续的水化反应导致波速不断提高;负温条件下(-5℃),冰颗粒的不断形成是波速不断提高的关键因素;由于波速在不同温度区间的增长机制不同,随着胶结剂含量的增加,低温充填体的波速呈现增长趋势,而负温充填体内波速呈现降低趋势;充填体的超声波波速与力学强度在低温条件下符合线性关系,在负温条件下符合指数型增长关系,这说明胶结充填体内冰颗粒的形成对于强度的增加效应更为显著,相关成果可为寒区充填采矿的强度预测及材料优化提供科学依据和实用指导。In order to establish the quantitative relationship between the mechanical parameters and ultrasonic wave velocity of backfill under low-temperature conditions in alpine regions,a non-metallic ultrasonic detector was used to analyze the evolution law of the ultrasonic wave velocity of backfill cured at low and negative temperatures and the differences in acoustic wave propagation characteristics compared with that of backfill cured at normal temperature.The results show that,under low-temperature conditions(≥0℃),the continuous hydration reaction leads to a continuous increase in wave velocity.Under negative temperature conditions(-5℃),the continuous formation of ice particles is the key factor for the continuous increase in wave velocity.Due to the different growth mechanisms of ultrasonic wave velocity in different temperature ranges,with the increase in the content of the binder,the wave velocity of the low-temperature backfill shows an increasing trend,while the wave velocity within the negative-temperature backfill shows a decreasing trend.Under low-temperature conditions,the wave velocity and mechanical strength of the backfill conform to a linear relationship,and under negative temperature conditions,they conform to an exponential growth relationship.This indicates that the formation of ice particles within the cemented backfill has a more significant effect on the increase of strength.The relevant results can provide scientific basis and practical guidance for strength prediction and material optimization in backfill mining in alpine regions.

关 键 词:寒区矿山 超声波波速 胶结充填体 强度预测 负温 

分 类 号:TD835[矿业工程—煤矿开采]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象