Experimental Study on the Technology of Middle Empty Hole in Parallel Hole Cut Blasting

Abstract:

In order to reduce the adverse effect of the blasting vibration velocity to residents in the urban subway blasting excavation construction, and made it meet the requirements of design, based on the stress concentration effect of empty hole, carried out the research of middle empty hole in parallel hole cut blasting. Adopted the technology of middle empty hole in parallel hole cut blasting, by measuring the blasting vibration velocity, the utilization rate of borehole, the half eye tracking rate, and so on, the results showed that the blasting vibration velocity of cut blasting was 0.69cm/s, the blasting vibration of expansion slot blasting was 1.27cm/s, the borehole utilization was 90%, and the half eye tracking rate of periphery holes was 90%. The test results showed that this technology could effectively reduce the blasting vibration under the residential areas in blasting excavation, the effective experiences could be used in the similar projects.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 1314-1317
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.1314
• Online since: November 2012
• Authors: Ren Shu Yang, Yu Long Che, Xing Tong, Yu Lin Mi, Lin Feng
• Keywords: Blasting Effect, Blasting Vibration, Middle Empty Hole, Subway Blasting

References

[1] GIORGIO Berta. Blasting-induced Vibration in Tunnelling[J].Tunnelling and Underground Space Technology, Vol. 9 (1994) No 2,pp.175-187.

DOI: 10.1016/0886-7798(94)90029-9

[2] S.Y. GUO. Progresses and Developments of Tunnel Construction Technology with Bored Blast Method[J]. Journal of Railway Engineering Society, 2007,No 9,pp.67-70.(In Chinese)

[3] M.S. WANG. Tunnelling and Underground Engineering Technology in China (China Communications Press, China Beijng, 2010).(In Chinese)

[4] X.B. LI, T.H. LING and Y.P. ZHANG. Analysis of Blast Vibration Signals-Theories and Methods (Science Press, China Beijing, 2009).(In Chinese)

[5] S.Y. FENG and Z.Q. WANG. The Problems for Blasting Shock of Urban Metro[J]. China Railways, (2000) No 6,pp.32-34.(In Chinese)

[6] Y.M. LI and Z.F. NI. The Characteristics on Surface Vibration of Blasting in Underground Engineering[J]. Chinese Journal of Rock Mechanics and Engineering, Vol. 16 (1997) No 3,pp.274-277.(In Chinese)

[7] S.G. FU, Y.H. WANG and K.L. XU. Study on the Evaluation of Blast Vibration Effect and Measures of Reducing Vibration[J]. Journal of Safety Science and Technology, Vol.4 (2008) No 6,pp.25-28.(In Chinese)

[8] X.G. WANG, Y.L. YU. On Several Problems of Safety Criterion for Blasting Vibration[J]. Engineering Blasting, Vol.2 (2001) No 7,p.88–92.(In Chinese)

[9] Z.Y. WANG, X. LIANG and Y.L. CHEN. Study of Safety Evaluation Method of Blasting Vibration Based on Input Energy[J]. Chinese Journal of Rock Mechanics and Engineering,Vol.29 (2010) No 12,pp.2492-2497.(In Chinese)

[10] J.H. ZHU. The Safety Evaluation of the Close Building under the Tunnel Blasting Vibration[J]. Chinese Journal of Explosives&Propellants, Vol.30 (2007) No 1,pp.78-80.(In Chinese)

[11] Z.W. YUE, R.S. YANG and D.M. GUO. Model Experimental of Stress Field Around Empty Hole Under Blasting Loading[J]. Journal of China Coal Society, Vol.5 (2009) No 34,pp.624-628.(In Chinese)