Numerical simulation on the cracking process of columnar jointed rock masses in contour blasting

Zhu Liang; Chen Ming; Lu Wen-bo; Yan Peng

doi:10.11883/1001-1455(2015)04-0555-06

Volume 35 Issue 4

Jun. 2016

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Zhu Liang, Chen Ming, Lu Wen-bo, Yan Peng. Numerical simulation on the cracking process of columnar jointed rock masses in contour blasting[J]. Explosion And Shock Waves, 2015, 35(4): 555-560. doi: 10.11883/1001-1455(2015)04-0555-06

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Numerical simulation on the cracking process of columnar jointed rock masses in contour blasting

doi: 10.11883/1001-1455(2015)04-0555-06

Zhu Liang^1
,,
Chen Ming^{1, 2
,
,},
Lu Wen-bo^{1, 2},
Yan Peng^{1, 2}

1.
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China
2.
Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China

Received Date: 2013-01-10
Rev Recd Date: 2014-05-06
Publish Date: 2015-07-25

Abstract

Abstract

With Baihetan columnar joints basalt as the research object, numerical model is generated according to the local distribution statistics. Based on numerical analysis, the cracking process of columnar jointed rock masses with the slope excavated by contour blasting is simulated. The results show that the columnar joints control and lead the generation of cracking in contour blasting. The joints around the hole are firstly opened by the explosion load. Then they extend along the joints near the defiled line of holes. Finally the cracks formed by a large number of columnar joints are connected. The process of the width of pre-splitting crack is that it reduces to stabile opening after increases under the condition of pre-splitting blasting. And the range of cracks in pre-splitting blasting is larger than these in smooth blasting.
- mechanics of explosion,
- cracking process,
- contour blasting,
- rock,
- columnar joints

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References(15)

References

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