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Chinese Journal of High Pressure Physics  > 2013  >  27(3): 403-410.
MU Chao-Min, PAN Fei. Numerical Study on the Damage of the Coal under Blasting Loads Coupled with Geostatic Stress[J]. Chinese Journal of High Pressure Physics, 2013, 27(3): 403-410. doi: 10.11858/gywlxb.2013.03.014
Citation: MU Chao-Min, PAN Fei. Numerical Study on the Damage of the Coal under Blasting Loads Coupled with Geostatic Stress[J]. Chinese Journal of High Pressure Physics, 2013, 27(3): 403-410. doi: 10.11858/gywlxb.2013.03.014
shu

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

doi: 10.11858/gywlxb.2013.03.014
  • 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

  • Received Date: 23 Jun 2011
  • Rev Recd Date: 25 Oct 2011
  • Publish Date: 15 Jun 2013
    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.

     

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