Numerical simulation on mechanism of fractured rock burst in deep underground tunnels

Zhao Hong-liang; Zhou You-he

doi:10.11883/1001-1455-(2015)03-0343-07

Volume 35 Issue 3

Jun. 2015

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Zhao Hong-liang, Zhou You-he. Numerical simulation on mechanism of fractured rock burst in deep underground tunnels[J]. Explosion And Shock Waves, 2015, 35(3): 343-349. doi: 10.11883/1001-1455-(2015)03-0343-07

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Zhao Hong-liang, Zhou You-he. Numerical simulation on mechanism of fractured rock burst in deep underground tunnels[J]. Explosion And Shock Waves, 2015, 35(3): 343-349. doi: 10.11883/1001-1455-(2015)03-0343-07

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Numerical simulation on mechanism of fractured rock burst in deep underground tunnels

doi: 10.11883/1001-1455-(2015)03-0343-07

Zhao Hong-liang^{1, 2
,},
Zhou You-he^{1, 2}

1.
School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, Gansu, China
2.
Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Ministry of Education of China, Lanzhou 730000, Gansu, China

Received Date: 2013-11-14
Rev Recd Date: 2014-03-28
Publish Date: 2015-05-25

Abstract

Abstract

Aiming at rockburst geological disaster induced by discontinuity such as faults or joints in deep lay rock mass, numerical model is presented according to distributional characteristics and geometrical aspects of potential seismic faults in underground tunnel.Subsequently, excavation response of deep lay surrounding rock with rigid flat faults is simulated via distinct element codes, and varied features of stress state in surrounding rock are examined while excavation process approaches and then passes through fault zones.Finally, Mechanism of action is discussed on the base of stress state change induced by available faults.Energy releases sharply via rockburst under high stress, and it is revealed that faulted structure occur movement within a certain region of excavation section.Rockburst impacts on surrounding rock intensely, and the mechanism is similar to fault stick slip in earthquake process.
- mechanics of explosion,
- rockburst mechanism,
- discrete element method,
- underground tunnel

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References(18)

References

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