Impact study on stability of unstable rock under underground construction blasting

Tang Hong-mei; Zhou Yun-tao; Chen Hong-kai; Liao Yun-ping

doi:10.11883/1001-1455(2015)02-0278-07

Volume 35 Issue 2

Mar. 2015

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Tang Hong-mei, Zhou Yun-tao, Chen Hong-kai, Liao Yun-ping. Impact study on stability of unstable rock under underground construction blasting[J]. Explosion And Shock Waves, 2015, 35(2): 278-284. doi: 10.11883/1001-1455(2015)02-0278-07

Citation:

Tang Hong-mei, Zhou Yun-tao, Chen Hong-kai, Liao Yun-ping. Impact study on stability of unstable rock under underground construction blasting[J]. Explosion And Shock Waves, 2015, 35(2): 278-284. doi: 10.11883/1001-1455(2015)02-0278-07

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Impact study on stability of unstable rock under underground construction blasting

doi: 10.11883/1001-1455(2015)02-0278-07

1.
Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2.
Institute of Geology & Mineral Resources of Chongqing, Chongqing 400042, China

Received Date: 2013-08-29
Rev Recd Date: 2013-11-13
Publish Date: 2015-03-25

Abstract

Abstract

On the basis of the peak velocity decay law of blasting and the assumption of unstable rock dominant fissure, and using Euler equations to work out the load of peak value blasting which acts on unstable rocks, and correcting peak force, it figured out the time history of blasting inertia force. Dynamic physical model and calculation model for three kinds of unstable rock were set up. The calculation method of stability coefficient with three kinds of unstable rock was given by combining with the limit equilibrium method. Within the scope of blasting time, it takes the minimal stability coefficient as the dynamic stability coefficient of the whole unstable rock, and establishes three kinds of dynamic evaluation method of unstable rock. Taking unstable rocks in Taibaiyan of Wanzhou in Chongqing as an example, five typical unstable rocks were chose to work out the calculation of dynamic stability coefficient. The calculation result can well evaluate and reflect the dynamic characteristics of unstable rock blocks by the calculation method for dynamic stability coefficient of the three kinds of unstable rock blocks.
- mechanics of explosion,
- stability,
- dynamic stability calculation method,
- unstable rock,
- dynamic load,
- time history curve

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References(14)

References

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