煤体在爆炸荷载和地应力耦合作用下裂纹扩展的数值模拟

穆朝民; 潘飞

doi:10.11858/gywlxb.2013.03.014

煤体在爆炸荷载和地应力耦合作用下裂纹扩展的数值模拟

doi: 10.11858/gywlxb.2013.03.014

穆朝民^1,2, ,,
潘飞^1,2

1.
安徽理工大学能源与安全学院，安徽淮南 232001；
2.
煤矿安全高效开采省部共建教育部重点实验室，安徽淮南 232001

详细信息

通讯作者:
穆朝民 E-mail:chmmu@mail.ustc.edu.cn

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出版历程
- 收稿日期: 2011-06-23
- 修回日期: 2011-10-25
- 发布日期: 2013-06-15

Numerical Study on the Damage of the Coal under Blasting Loads Coupled with Geostatic Stress

MU Chao-Min^{1,2
, ,},
PAN Fei^1,2

1.
School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan 23001, China;
2.
Key Laboratory of Mining Coal Safety and Efficiently Constructed by Anhui Province and Ministry of Education, Huainan 232001, China

摘要

摘要: 建立含瓦斯煤的拉压动态损伤动态本构模型，将此模型嵌入LS-DYNA软件中，对含瓦斯煤体柱状装药欲裂爆破进行了模拟，数值模拟与模型实验基本一致。结果表明，煤体在爆炸荷载作用下，裂纹主要是由于压缩波和卸载波共同作用形成的，地应力对裂纹的发展具有抑制作用，主应力对于拉伸裂纹的发展具有明显的导向作用。
- 含瓦斯煤 /
- 应力分布 /
- 柱状装药 /
- 数值模拟
Abstract: In order to investigate on cracks propagation of the coal under column charge blasting subjected to geostatic stress, the damage constitutive model was established by considering tension and compression. The improved damage constitutive model was embedded in the FEM software to study the mechanics of cracks propagation coupled by blasting loads and geostatic stress. The precision of simulation is proved because the numerical results are in good with model experiments. The results show that the interaction of the compression wave and unloading wave yield cracks in the coal. The cracks are somewhat inhibited by geostatic stress. The direction of cracks is in accordance with the major principal stress.
- gas-filled coal /
- distribution of stress /
- column charge /
- numerical simulation

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参考文献(18)

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