V-Type Firing Pattern in Blasting: Evidence to Substantiate the Improved Fragmentation

Jump To References Section

Authors

  • Lalit Singh Chouhan
     Mining Department, Kotputli Cement Work, UltraTech Cement Limited, Jaipur ,IN
  • Avtar K. Raina
     CSIR-Central Institute of Mining and Fuel research, Nagpur ,IN
  • V. M. S. R. Murthy
     Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad - 826004, Jharkhand ,IN

DOI:

https://doi.org/10.18311/jmmf/2022/32100

Keywords:

Blasting, Diagonal Firing Pattern, Fragmentation, Throw, V-Firing Pattern

Abstract

Firing sequence of blastholes in blasting is an inherent part of the blast design for various reasons that range from the spatial requirements to the control of throw during blasting in surface mines. Despite several such patterns in vogue, role of firing sequences in defining the size of fragmented block sizes is not properly understood. The V-type firing pattern is believed to improve blast fragmentation because of the collision of moving fragments during the blasting process, thus resulting in further breakage. There are practically negligible studies that substantiate this assertion. The role of V-type firing pattern has been explored in this paper with simple logic and some field data. It is observed that the V-type firing pattern produces better fragmentation and controls the throw during blasting. A comparison with diagonal firing pattern, in controlled experiments, makes it evident that V-type firing pattern can be used to advantage for fragmentation improvement.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

Downloads

Published

2023-03-14

How to Cite

Singh Chouhan, L., Raina, A. K., & Murthy, V. M. S. R. (2023). V-Type Firing Pattern in Blasting: Evidence to Substantiate the Improved Fragmentation. Journal of Mines, Metals and Fuels, 70(9), 499–507. https://doi.org/10.18311/jmmf/2022/32100

Issue

Volume 70, Issue 9, September 2022

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Crossref
Scopus
Google Scholar
Europe PMC

 

References

Afeni, T.B. (2009). Optimization of drilling and blasting operations in an open pit mine-the SOMAIR experience. Mining Science and Technology, 19(6), 736-739. https://doi.org/10.1016/S1674-5264(09)60134-4 DOI: https://doi.org/10.1016/S1674-5264(09)60134-4

Choudhary, B.S. (2013). Firing Patterns and Its Effect on Muckpile Shape. 32-45.

Choudhary, B.S., & Arora, R. (2018). Influence of front row burden on fragmentation, muckpile shape, excavator cycle time, and back break in surface limestone mines. Iranian Journal of Earth Sciences, 10(1), 1-10.

Chouhan, L.S., & Raina, A.K. (2015a). Analysis of In-Flight Collision Process During V-Type Firing Pattern in Surface Blasting Using Simple Physics. Journal of the Institution of Engineers (India): Series D, 96(2), 85-91. https://doi.org/10.1007/s40033-015-0076-6

Chouhan, L.S., & Raina, A.K. (2015b). Analysis of In-Flight Collision Process During V-Type Firing Pattern in Surface Blasting Using Simple Physics. Journal of the Institution of Engineers (India): Series D, 96(2). https://doi.org/10.1007/s40033-015-0076-6 DOI: https://doi.org/10.1007/s40033-015-0076-6

Da Gama, C. D., & Jimeno, C. L. (1993). Rock fragmentation control for blasting cost minimization and environmental impact abatement. Rock Fragmentation by Blasting, 273-280.

Dey, K., & Sen, P. (2003). Concept of Blastability-An Update. The Indian Mining and Engineering Journal, 42(8- 9), 24-31.

Duvall, W.I., & Atchison, T.C. (1957). Rock Breakage by Explosives.

Hagan, T.N. (1979). Optimum Design Features of Controlled Trajectory Blasting (Ctb). Proceedings of the Annual Conference on Explosives and Blasting Technique, 21-38.

Hustrulid, W. (1999). Blasting principles for open pit mining: Volume 1 - General design concepts (Vol. 1).

Jimeno, C.L., Jimeno, E.L., Carcedo, F.J. & De Ramiro, Y. (1997). Drilling and Blasting of Rocks. Environmental & Engineering Geoscience, III(1), 154. https://doi. org/10.2113/gseegeosci.III.1.154 DOI: https://doi.org/10.2113/gseegeosci.III.1.154

Konya, C.J., & Walter, E.J. (1991). Rock blasting and overbreak control (No. FHWA-HI-92-001; NHI-13211). In Security (Issue 132).

Mackenzie, A. (1966). Cost of explosives-do you evaluate it properly? Mining Congress Journal, 52(5), 32-41.

Raina, A.K.K., Haldar, A., Chakraborty, A.K.K., Choudhury, P.B.B., Ramulu, M., & Bandyopadhyay, C. (2004). Human response to blast-induced vibration and air-overpressure: An Indian scenario. Bulletin of Engineering Geology and the Environment, 63(3), 209-214. https://doi.org/10.1007/s10064-004-0228-7 DOI: https://doi.org/10.1007/s10064-004-0228-7

Shim, H.J., Ryu, D.W., Chung, S.K., Synn, J.H., & Song, J.sJ. (2009). Optimized blasting design for large-scale quarrying based on a 3-D spatial distribution of rock factor. International Journal of Rock Mechanics and Mining Sciences, 46(2), 326-332. https://doi.org/10.1016/j.ijrmms.2008.07.006 DOI: https://doi.org/10.1016/j.ijrmms.2008.07.006