煤体中爆炸应力波传播与衰减规律模拟实验研究

褚怀保; 杨小林; 侯爱军; 余永强; 梁为民

doi:10.11883/1001-1455(2012)02-0185-05

褚怀保, 杨小林, 侯爱军, 余永强, 梁为民

文章导航 > 爆炸与冲击 > 2012 > 32(2): 185-189

褚怀保, 杨小林, 侯爱军, 余永强, 梁为民. 煤体中爆炸应力波传播与衰减规律模拟实验研究[J]. 爆炸与冲击, 2012, 32(2): 185-189. doi: 10.11883/1001-1455(2012)02-0185-05

引用本文:

CHU Huai-bao, YANG Xiao-lin, HOU Ai-jun, YU Yong-qiang, LIANG Wei-min. Asimulation-basedexperimentalstudyonexplosionstresswavepropagationandattenuationincoa[J]. Explosion And Shock Waves, 2012, 32(2): 185-189. doi: 10.11883/1001-1455(2012)02-0185-05

Citation:

CHU Huai-bao, YANG Xiao-lin, HOU Ai-jun, YU Yong-qiang, LIANG Wei-min. Asimulation-basedexperimentalstudyonexplosionstresswavepropagation andattenuationincoa[J]. Explosion And Shock Waves, 2012, 32(2): 185-189. doi: 10.11883/1001-1455(2012)02-0185-05

引用本文:

Citation:

CHU Huai-bao, YANG Xiao-lin, HOU Ai-jun, YU Yong-qiang, LIANG Wei-min. Asimulation-basedexperimentalstudyonexplosionstresswavepropagation andattenuationincoa[J]. Explosion And Shock Waves, 2012, 32(2): 185-189. doi: 10.11883/1001-1455(2012)02-0185-05

煤体中爆炸应力波传播与衰减规律模拟实验研究

doi: 10.11883/1001-1455(2012)02-0185-05

1.
河南理工大学土木工程学院,河南焦作454000;
2.
洛阳理工学院,河南洛阳471023

基金项目:

国家自然科学基金项目(50874039)

河南省教育厅基金项目(2010B410001)

河南理工大学杰出青年基金项目(J2010-1)

详细信息

通讯作者:
褚怀保

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出版历程
- 刊出日期: 2012-03-25

Asimulation-basedexperimentalstudyonexplosionstresswavepropagation andattenuationincoa

1.
CollegeofCivilEngineering,HenanPolytechnicUniversity,
2.
Jiaozuo 454000,Henan,China;

Funds:

NationalNaturalScienceFoundationofChina(50874039)

More Information

Corresponding author: CHU Huai-bao

摘要

摘要: 在岩石爆破理论的基础上分析了煤体中爆炸应力波的作用机理,借助损伤力学理论探讨了煤体在爆炸应力波作用下的损伤断裂准则。煤体中爆炸应力波传播与衰减规律模拟实验结果表明:煤体中爆炸应力波一般包含2段波形,第1段由压缩相和拉伸相组成简单波形,第2段是由多种作用形成的复杂波形;爆炸应力波作用下,煤体首先承受压应力,而后承受拉应力,且压缩相的作用时间较拉伸相作用时间短;煤体中爆炸应力波的衰减速度较一般岩体中的快,实验条件下应力波衰减因数符合=3-/(1-),爆炸应力波的主要作用是在煤体中形成少量新裂隙、激活煤体中原生裂隙并打破煤体中瓦斯气体的平衡状态。
- 爆炸力学|传播与衰减规律|模拟实验 /
- 煤体
Abstract: Basedonthetheoryofrockblasting,theactionmechanismofexplosionstresswaveincoal wasanalyzed.Thedamagefracturecriteriaforcoalsubjectedtoexplosionstresswavewasexplored accordingtothedamagemechanicstheory.And,simulationexperimentswereconductedtoobtainthe attenuationlawofexplosionstresswavepropagationincoal.Theexperimentalresultsshowthatthe stresswaveateachmeasuredpointcontainstwoormorewaveforms,therearecompressionphaseand tensilephaseinthefirstwave,thewaveformofwhichissimpleandsmooth,andthesecondwaveis theresultofavarietyofaction,thewaveformofwhichiscomplex;thatthecoalmediaisfirstunder compressivestressandthenundertensilestress,theactiontimeofthecompressivestresswasshorter thanthatofthetensilestress;andthatthedecayrateofexplosionstresswaveincoalisfasterthanin generalrock.Themaineffectsofexplosionstresswaveincoalconsistofformingasmallnumberof newcrannies,activatingthenativecranny,andbreakingthebalanceofcoalgas.
- mechanicsofexplosion /
- propagationandattenuation