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材料导报  2024, Vol. 38 Issue (9): 22070248-7    https://doi.org/10.11896/cldb.22070248
  无机非金属及其复合材料 |
碱渣改性充填体早期力学特性及能量演化特征
孙海宽1,2, 甘德清1,2,*, 薛振林1,2, 刘志义1,2, 张雅洁1,2
1 华北理工大学矿业工程学院,河北 唐山 063200
2 华北理工大学河北省矿业开发与安全技术重点实验室,河北 唐山 063200
Early Mechanical Properties and Energy Evolution Characteristics of Alkali Slag Modified Backfill
SUN Haikuan1,2, GAN Deqing1,2,*, XUE Zhenlin1,2, LIU Zhiyi1,2, ZHANG Yajie1,2
1 College of Mining Engineering, North China University of Technology, Tangshan 063200, Hebei, China
2 Mining Development and Safety Technology Key Laboratory of Hebei Province, North China University of Technology, Tangshan 063200, Hebei, China
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摘要 为探究碱渣改性充填体的早期力学特性及能量演化特征,利用WHY-600压力机开展了单轴压缩试验,分析了其抗压强度、弹性模量、破裂模式及能量变化,结合响应曲面法,对质量浓度、尾砂级配及碱渣添加量进行寻优分析。结果表明:随碱渣添加量增加,充填体失稳破坏位移量、单轴抗压强度、弹性模量先增大后减小,当碱渣添加量为5%时,充填体抗压强度大,抵抗变形能力强;随碱渣添加量增加,充填体耗散能、弹性变形能、峰值强度下单位体积应变能及总能量均先增加后减小;单轴压缩条件下,碱渣改性充填体破坏模式为半贯穿或贯穿的斜剪切、平行双裂隙以及倒Y型裂隙,破坏程度随碱渣添加量增加而增大;建议采用质量浓度77%、细粗尾砂级配3∶7、碱渣添加量5.35%的配比来制备碱渣改性充填体,经计算其抗压强度为5.345 8 MPa,能满足矿山早期生产需求。研究结果为碱渣改性材料的可行性提供了一定的理论依据。
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孙海宽
甘德清
薛振林
刘志义
张雅洁
关键词:  碱渣改性充填体  单轴抗压强度  能量演化特征  破裂模式  配比参数寻优    
Abstract: To investigate the early mechanical properties and energy evolution characteristics of the alkali slag modified backfill, uniaxial compression test was carried out using WHY-600 press to analyze the compressive strength, elastic modulus, failure mode and energy change. Combined with the response surface methodology, the mass concentration, tailings gradation and alkali slag addition were analyzed to optimize the results. The results show that with the increase of alkali slag addition, the instability damage displacement, uniaxial compressive strength and elastic modulus of the backfill first increase and then decrease. When the amount of alkali slag addition is 5%, the backfill has high compressive strength and strong resistance to deformation. The dissipation energy, elastic deformation energy, strain energy per unit volume at peak strength and total energy of the backfill increase and then decrease with the increase of alkali slag addition. Under uniaxial compression, the failure model of the alkali slag modified backfill is semi-penetrating or penetrating oblique shear, parallel double crack and inverted Y-shaped fracture, and the degree of damage increases with the increase of alkali slag addition. It is recommended to prepare alkali slag modified backfill with 77% mass concentration, 3∶7 fine and coarse tailings gradation, and 5.35% alkali slag addition, and the calculated compressive strength is 5.345 8 MPa, which can satisfy the early production demand of the mine. The results provide some theoretical basis for the feasibility of alkali slag modified materials.
Key words:  alkali slag modified backfill    uniaxial compressive strength    energy evolution characteristic    failure model    proportional parameters optimization
出版日期:  2024-05-10      发布日期:  2024-05-13
ZTFLH:  TD853  
基金资助: 河北省博士研究生创新资助项目(CXZZBS2023127);国家自然科学基金(51774137;52074124)
通讯作者:  * 甘德清,博士,华北理工大学矿业工程学院教授、博士研究生导师,研究方向为采矿工艺理论与技术、资源绿色开发与智能采矿。近年来发表学术论文90余篇,获授权发明专利16项,获国家科技进步二等奖1项。g15613873876@163.com   
作者简介:  孙海宽,2021年3月于华北理工大学矿业工程学院获得工学硕士学位。2021年9月至今为华北理工大学矿业工程学院博士研究生,指导教师为甘德清教授。研究方向为资源绿色开发与智能采矿。
引用本文:    
孙海宽, 甘德清, 薛振林, 刘志义, 张雅洁. 碱渣改性充填体早期力学特性及能量演化特征[J]. 材料导报, 2024, 38(9): 22070248-7.
SUN Haikuan, GAN Deqing, XUE Zhenlin, LIU Zhiyi, ZHANG Yajie. Early Mechanical Properties and Energy Evolution Characteristics of Alkali Slag Modified Backfill. Materials Reports, 2024, 38(9): 22070248-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22070248  或          http://www.mater-rep.com/CN/Y2024/V38/I9/22070248
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