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Volume 35 Issue 1
Jan 2021
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Chinese Journal of High Pressure Physics  > 2021  >  35(1): 015202.
WANG Guilin, OUYANG Xiaotian, ZHAI Jun, SUN Fan. Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616
Citation: WANG Guilin, OUYANG Xiaotian, ZHAI Jun, SUN Fan. Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery[J]. Chinese Journal of High Pressure Physics, 2021, 35(1): 015202. doi: 10.11858/gywlxb.20200616
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Ground Response Law of Methane Explosion in Shallow Buried Three-Cabin Pipe Gallery

doi: 10.11858/gywlxb.20200616
  • 1.

    School of Civil Engineering, Chongqing University, Chongqing 400045, China

  • 2.

    National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing 400045, China

  • 3.

    Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Chongqing University, Chongqing 400045, China

  • Received Date: 21 Sep 2020
  • Rev Recd Date: 15 Oct 2020
    Abstract
  • Explosion venting accidents in underground comprehensive pipe corridors occur from time to time, causing huge losses to ground personnel and property. Based on a pilot project of an underground comprehensive pipe gallery in Chongqing and the material point method, a high-energy combustion model is used to simulate the process of leaking methane gas explosive’s impact on the structure and surrounding rock of the pipe gallery. Through the simulation, the response characteristics of ground pressure and displacement are studied. The results show that: under the effect of explosion, secondary stress waves caused by reflection and refraction of the contact surface will appear in the pipe gallery and surrounding rock. In the transverse direction, the amplitude of the secondary wave increases with the increase of the horizontal distance from the initiation point, while that generated in the longitudinal direction keeps smaller, and the change remains small with the increasing distance. The explosion caused the overall ground subsidence, but the ground bulged near the center of the detonation point. This bulge was composed of a violent bulge formed by the pipe gallery lining broken and gas directly impacting the rock and soil, and a slight bulge formed by the overall vibration of the pipe gallery.

     

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