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吕祥锋, 潘一山, 李忠华, 代树红. 爆炸冲击载荷作用下吸能支护巷道变形规律研究[J]. 岩土工程学报, 2011, 33(8): 1222-1226.
引用本文: 吕祥锋, 潘一山, 李忠华, 代树红. 爆炸冲击载荷作用下吸能支护巷道变形规律研究[J]. 岩土工程学报, 2011, 33(8): 1222-1226.
L? Xiang-feng, PAN Yi-shan, LI Zhong-hua, DAI Shu-hong. Law of roadway deformation of energy absorbing support under explosive loading[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(8): 1222-1226.
Citation: L? Xiang-feng, PAN Yi-shan, LI Zhong-hua, DAI Shu-hong. Law of roadway deformation of energy absorbing support under explosive loading[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(8): 1222-1226.

爆炸冲击载荷作用下吸能支护巷道变形规律研究

Law of roadway deformation of energy absorbing support under explosive loading

  • 摘要: 利用低能爆炸加载方式,采用相似材料模拟试验方法,借助数字散斑光测手段( DSCM ),研究高速冲击载荷作用下吸能支护巷道变形规律。试验结果表明,巷道顶板首先出现微裂缝,顶板向下位移约为 0.6 mm ,顶板岩层与煤层交界处无错动现象,冲击波重复作用使得模型顶面出现贯通裂缝,但巷道及周围岩体并无破坏,说明吸能支护可吸收大量冲击能,从而有效降低对巷道的冲击破坏。通过模拟试验结果可知,采用吸能支护可大大降低巷道的破坏程度,对于采矿工程安全生产具有实际意义,同时为巷道支护提供一种新方法。

     

    Abstract: Using the low-energy explosive loading and the digital speckle correlation method, the law of roadway deformation of energy absorbing supports is studied by similarity simulation experiments. The experimental results illustrate that cracks firstly appear in the roof under explosive loading, and transverse cracks appear at the top of the model by repeated action of impact wave. Also, digital speckle pattern observations show that the roof has sinking deformation about 0.6 mm. But, there is no displacement between coal body and upper roadway, and the roadway and the surrounding rock have no damage. It is proved that the energy absorbing support can absorb large impact energy and reduce the roadway damage effectively. The simulated results show that the energy absorbing support can reduce the roadway destruction evidently. It is practical for safety mining engineering and also provides a new method for roadway support.

     

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