Open Access
Vedala Rama Sastry
B. Rajasekhar
G. Raghu Chandra
- Professor Department of Mining Engineering, National Institute of Technology Karnataka India
- Former PG Student Department of Mining Engineering, National Institute of Technology Karnataka India
Abstract
In an opencast mine involving hard rock/deposit excavation, blasting becomes a very important activity. Effective usage of explosive energy to fragment and displace the hard strata results in considerable savings. However, the occurrence of blasts in mines is so rapid that the naked eye cannot detect the process. High-speed videography can provide the progress of blast in millisecond time scale needed to analyze the happenings in the blast. An attempt is made through this paper to present a case study of assessing the performance of blasts based on explosive energy available at different sections of the blasthole and correlating it with burden rock movement.
Keywords: Blast performance, energy distribution, burden rock movement
[This article belongs to International Journal of Geological and Geotechnical Engineering(ijgge)]
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References
1. Atlas Powder Company. Field Technical Operations. Explosives and Rock Blasting. Dallas, Tex.: Field Technical Operations, Atlas Powder Co.; 1987.
2. Jha AK. Evaluation of mine productivity and economics by effective blast instrumentation: a technoeconomic proposition. J Geol Resour Eng. 2013;1:31–8.
3. Trivedi R, Singh TN, Raina AK. Prediction of blast-induced fly rock in Indian limestone mines using neural networks. J Rock Mech Geotech Eng. 2014:1674–7755.
4. Mishra AK. Blast Design Using High Speed Video Camera in Coal Measure Rocks. Berlin: LAP Lambert Academic Publishing; 2012.
5. Adhikari GR. Selection of blasthole diameter for a given bench height at surface mines. Int J Rock Mech Min Sci. 1999;36(6):843–7. doi: 10.1016/S0148–9062(99)00051–0.
6. Ren F, Sow TAM, He R, Liu X. Optimization and application of blasting parameters based on the “pushing-wall” mechanism. Int J Miner Metall Mater. 2012;19(10):879–85. doi: 10.1007/s12613–012–0642-y.
7. Chiappetta RF, Vandenberg B. Workshop on Using High-Speed Motion Picture Photography for Blast Analysis. Evaluation and Design. Proceedings, Second High-tech Seminar on state-of-the-art Blasting Technology, Instrumentation and Explosives Applications, Orlando, FL, USA, Seminar; 1990. p. 154.
8. Sastry VR, Chandar KR. Analysis of delay timing in blasting operations using high speed video recordings, National Seminar on Explosives & Infrastructure Industry. Surathkal: National Institute of Technology Karnataka; 2013.
9. Chiappetta RF, Mammele ME. Analytical high-speed photography to evaluate air decks, stemming retention and gas confinement in presplitting, reclamation and gross motion application. Proceedings, Second International Symposium on Rock Fragmentation by Blasting. Keystone, CO; August 1987. P. 23–8.
10. Vedala RS, Chandra KR, Adithya N, Saiprasad. Application of high-speed videography in assessing the performance of blasts. Int J Geol Geotech Eng. December 2015;1(2):19–33.
11. Mandal SK, Singh MM, Dasgupta S. Theoretical concept to understand plan and design smooth blasting pattern. Geotech Geol Eng. 2008;26(4):399–416. doi: 10.1007/s10706–008–9177–4.
12. Jhanwar JC, Jethwa JL. The use of air decks in production blasting in an open pit coal mine. Geotech Geol Eng. 2000;18(4):269–87. doi: 10.1023/A:1016634231801.
13. Sastry VR. Study of the impact of ground vibrations and fly rock caused due to blasting operations in Jawahar Khani Opencast Project on surrounding structures, Yellandu. Telangana: Singareni Collieries Co, Ltd.; 1997 [an unpublished report].
14. Nabiullah MJ, Pingua BMP, Singh TN. Application of high-speed video technique in blasting. J Mines Met Fuels. 2002;50(3):54–7.
15. Sastry VR. A study of the effect of some parameters on rock fragmentation due to blasting. [Ph.D. thesis]. Indian Institute of Technology (Banaras Hindu University); 1989.
International Journal of Geological and Geotechnical Engineering
| Volume | 8 |
| Issue | 1 |
| Received | March 31, 2022 |
| Accepted | April 13, 2022 |
| Published | January 13, 2023 |