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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, PP. 403-410

Keywords: 含瓦斯煤,应力分布,柱状装药,数值模拟

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Abstract:

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。

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