Volume 27 Issue 4
Aug.  2021
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Article Navigation >  Journal of Geomechanics  > 2021  >  27(4): 643-651
DING Yanlu, YUE Zhongqi, 2021. Experimental study on the dynamic rupture of coal and rock caused by high-pressure gas. Journal of Geomechanics, 27 (4): 643-651. DOI: 10.12090/j.issn.1006-6616.2021.27.04.053
Citation: DING Yanlu, YUE Zhongqi, 2021. Experimental study on the dynamic rupture of coal and rock caused by high-pressure gas. Journal of Geomechanics, 27 (4): 643-651. DOI: 10.12090/j.issn.1006-6616.2021.27.04.053
shu

Experimental study on the dynamic rupture of coal and rock caused by high-pressure gas

doi: 10.12090/j.issn.1006-6616.2021.27.04.053
  • 1.

    College of Engineering, Peking University, Beijing 100871, China

  • 2.

    Beijing International Research Center for Gas Hydrate, Peking University, Beijing 100871, China

  • 3.

    Department of Civil Engineering, The University of Hong Kong, Hong Kong SAR 999077, China

Funds:

the Hong Kong Research Grants Council HKU 17204415

the Hong Kong Research Grants Council HKU 17207518

More Information
  • Received: 2021-04-29
  • Revised: 2021-07-01
  • Published: 2021-08-28
    Abstract
  • A special test apparatus has been designed and used to study the effect of high-pressure gas on the deformation and failure of coal and rock. Dynamic ruptures of coal and rock are carried out by gas decompression. The results show that low gas decompression rate only causes deformation of coal specimens slightly while high gas decompression rate leads to fracture and outburst phenomenon. The degree of damage of rocks depends on not only the gas decompression rate but also the gas pressure. Violent fragmentation occurs when gas decompression rate and high saturation pressure reach critical values. According to the relationship between the decompressed gas pressure and strain, the critical gas pressures are determined for the fracture and fragmentation of specimens.

     

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