冲击载荷作用下磁铁矿石破碎能耗特征

doi:10.13722/j.cnki.jrme.2016.1150

摘要
图/表
参考文献(20)
相关文章 (15)

全文: PDF (480 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要

为掌握冲击作用下磁铁矿石破碎能耗特征，采用分离式Hopkinson压杆(SHPB)试验装置，设计不同冲击气压对磁铁矿石试件进行冲击压缩试验，分析试验中磁铁矿石破碎能耗特征。结果表明，试验中能量形式及分布规律为：透射能＞吸收能＞反射能；磁铁矿石吸能效率随着入射能的增加呈先增加后稳定的变化趋势，其最大值为39.5%；除吸收能之外，当入射能小于180 J时，随着入射能的增加，透射能占总入射能的百分比逐渐减小，反射能占总入射能的百分比逐渐增大但增长率较小，能量主要以透射形式耗散，当入射能大于180 J时，随着入射能的增加，透射能和反射能分别占总入射能的百分比基本不变，能量主要以透射和反射的形式耗散；试件破碎形态随入射能的增加分别呈柱状、柱状与针状混合、细小针状、碎屑粉末，当入射能为180 J时，碎块平均粒径为15～18 mm；磁铁矿石试件破碎耗能密度随入射能的增加呈线性增长，破碎耗能密度越大，试件破碎程度越剧烈，碎块平均粒径随破碎耗能密度增大而逐渐减小。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	甘德清1
	2
	刘志义1
	2
	李占金1
	2
	高锋1
	2
	任贺旭1
	2

关键词 ：采矿工程, 磁铁矿石, 冲击载荷, 能量耗散, 破碎块度, 分离式Hopkinson压杆(SHPB)

Abstract：

In order to understand the broken energy dissipation of magnetite，impact compression tests were conducted with split Hopkinson pressure bar(SHPB). Results show that：(1) The energy distribution following： transmitted energy＞absorbed energy＞reflected energy. (2) The energy absorption efficiency of magnetite increased up to 39.5% firstly，then keep stable with the growth of incident energy. (3) In addition to absorbed energy，the ratio of transmission energy to total incident energy reduces gradually with the grow of incident energy and the form of energy dissipation was transmission(when less than 180 J)，the ratio of reflected energy to total incident energy increase with a small growth rate，when the incident energy was more than 180 J，the ratio of transmission energy and reflected energy to total incident energy keeps unchanging with the growth of incident energy，and the form of energy dissipation were transmission and reflection. (4) The broken forms of magnetite specimens presents columnar，columnar mixed with needles，fine needles，powdery respectively with the growth of incident energy，and the average particle size is 15–18 mm(when incident energy is 180 J). (5) The broken energy density increases linearly with the growth of incident energy，the average particle size of broken fragments decrease with the broken energy dissipation growing.

Key words： mining engineering magnetite impact loads energy dissipation broken fragments split Hopkinson pressure bar(SHPB)

引用本文:

甘德清1，2，刘志义1，2，李占金1，2，高锋1，2，任贺旭1，2. 冲击载荷作用下磁铁矿石破碎能耗特征[J]. 岩石力学与工程学报, 2018, 37(S1): 3500-3506.
GAN Deqing1，2，LIU Zhiyi1，2，LI Zhanjin1，2，GAO Feng1，2，REN Hexu1，2. Broken energy dissipation characteristics of magnetite under impact loads. , 2018, 37(S1): 3500-3506.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.1150 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS1/3500

[1]	雷平喜. 新常态下我国铁矿石产业面临新的严峻形势[N]. 中国国土资源报，2015：5-13.(LEI Pingxi. New grim situationof iron ore industryunder the new normalin China[N]. The Chinese newspaper of land and resources，2015：5-13.(in Chinese))
[2]	LIX B，WANG S M，WENG L，et al. Damage constitutive model of different age concretes under impact load[J]. Journal of Central South University，2015，22(2)：693-700.
[3]	李夕兵，陶明，宫凤强，等. 冲击载荷作用下硬岩层裂破坏的理论和试验研究[J]. 岩石力学与工程学报，2011，30(6)：1 081-1 088. (LI Xibing，TAO Ming，GONG Fengqiang，et al.Theoretical and experimental study of hard rock spalling fracture under impact dynamic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(6)：1 081-1 088.(in Chinese))
[4]	李地元，成腾蛟，周韬，等. 冲击载荷作用下含孔洞大理岩动态力学破坏特性试验研究[J]. 岩石力学与工程学报，2015，34(2)： 249-260.(LI Diyuan，CHENG Tengjiao，ZHOU Tao，et al.Experimental study of the dynamic strength and fracturing characteristics of marble specimens with a single hole under impact loading[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(2)：249-260.(in Chinese))
[5]	平琦，骆轩，马芹永，等. 冲击载荷作用下砂岩试件破碎能耗特征[J]. 岩石力学与工程学报，2015，34(增2)：4 197-4 203.(PING Qi，LUO Xuan，MA Qinyong，et al.Broken energy dissipation characteristics of sandstone specimens under impact loads[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.2)： 4 197-4 203.(in Chinese))
[6]	许金余，刘石. SHPB试验中高温下岩石变形破坏过程的能耗规律分析[J]. 岩石力学与工程学报，2013，32(增2)：3 109-3 115.(XU Jinyu，LIU Shi. Analysis of energy dissipation rule during deformation and fracture process of rock under high temperatures in SHPB test[J].Chinese Journal of Rock Mechanics and Engineering，2013，32(Supp.2)：3 109-3 115.(in Chinese))
[7]	许金余，刘石. 大理岩冲击加载试验碎块的分形特征分析[J]. 岩土力学，2012，33(11)：3 225-3 229.(XU Jinyu，LIU Shi. Research on fractal characteristics of marble fragmentssubjected to impact loading[J]. Rock and Soil Mechanics，2012，33(11)：3 225-3 229.(in Chinese))
[8]	刘晓辉，张茹，刘建锋. 不同应变率下煤岩冲击动力试验研究[J]. 煤炭学报，2012，37(9)：1 528-1 534.(LIU Xiaohui，ZHANG Ru，LIU Jianfeng. Dynamic test study of coal rock under different strain rates[J]. Journal of China Coal Society，2012，37(9)：1 528-1 534.(in Chinese))
[9]	刘晓辉，张茹，刘建锋. 冲击加载下煤岩破碎块度与能耗关系的试验研究[J]. 中国煤炭，2014，40(6)：45-49.(LIU Xiaohui，ZHANG Ru，LIU Jianfeng. Experimental research on relationship between crushing size and energy consumption of coal rock under impact loading[J]. China Coal，2014，40(6)：45-49.(in Chinese))
[10]	李业学，刘建锋，秦丽. 应力波穿越岩石节理时能量耗散规律的实验研究[J]. 实验力学，2011，26(1)：85-90.(LI Yexue，LIU Jianfeng，QIN Li. Experimental study on rule of energy dissipationof stress wave across rock joint[J]. Journal of Experimental Mechanics，2011，26(1)：85-90.(in Chinese))
[11]	李业学. 应力波穿越节理时能量耗散过程与机理研究[J]. 矿业研究与开发，2011，31(3)：20-22+44.(LI Yexue. Study on process and mechanisms of energy dissipation in stress wave propagation through jointed rock[J]. Mining Research and Development，2011，31(3)：20-22+44.(in Chinese))
[12]	李业学，彭琦，朱建波，等. 分形截距对应力波能耗影响规律的试验研究[J]. 岩石力学与工程学报，2011，30(增2)：3 982-3 988. (LI Yexue，PENG Qi，ZHU Jianbo，et al.Experimental study of influentialrule of fractal intercept on energy dissipation of stress wave[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(Supp.2)：3 982-3 988.(in Chinese))
[13]	李业学，徐福卫. SHPB在节理岩石动力学性能分析中的可行性研究[J]. 湖北文理学院学报，2015，36(8)：36-40.(LI Yexue，XU Fuwei. Feasibility of SHPB experimental technique applied to analyzingdynamic characteristic of jointed rock[J]. Journal of Hubei University of Arts and Science，2015，36(8)：36-40.(in Chinese))
[14]	DARYADEL S S，MANTENA PR，KIM KY，et al.Dynamic response of glass under low-velocity impact and highstrain-rate SHPB compression loading[J].Journal of Non-Crystalline Solids，2016，432(1)：432-439.
[15]	施劲松，许金余，任韦波，等. 高温后混凝土冲击破碎能耗及分形特征研究[J]. 兵工学报，2014，35(5)：703-710.(SHI Jinsong，XU Jinyu，REN Weibo，et al.Research on energy dissipation and fractal characteristics of concrete after exposure to elevated temperatures under impact loading[J]. Acta Armamentarii，2014，35(5)：703-710.(in Chinese))
[16]	杜晶. 不同长径比下岩石冲击动力学特性研究[硕士学位论文][D]. 长沙：中南大学，2011.(DU Jing. Size effect on the dynamic mechanical properties under impact loads of rock[M. S.Thesis][D].Changsha：Central South University，2011.(in Chinese))
[17]	洪亮，李夕兵，马春德，等. 岩石动态强度及其应变率灵敏性的尺寸效应研究[J]. 岩石力学与工程学报，2008，27(3)：526-533.(HONG Liang，LI Xibing，MAChunde，etal. Study on size effect of rock dynamic strength and strain rate sensitivity[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：526-533.(in Chinese))
[18]	LI M，MAO XB，LU AH，et al.Effect of specimen size on energy dissipation characteristics of red sandstone under high strain rate[J].International Journal of Mining Science and Technology，2014，24(2)：151-156.
[19]	AL-SALLOUM Y，ALMUSALLAM T，IBRAHIM SM，et al. Rate dependent behavior and modeling of concrete based on SHPBexperiments[J]. Cement andConcrete Composites，2015，55(1)：34-44.
[20]	洪亮. 冲击荷载下岩石强度及破碎能耗特征的尺寸效应研究[博士学位论文][D]. 长沙：中南大学，2008.(HONG Liang. Size effect on strength and energy dissipation in fracture of rock under impactloads[Ph. D. Thesis][D]. Changsha：Central South University，2008.(in Chinese))