Science and Technology of Energetic Materials

Vol.69, No.6 (2008)


Study on underwater blasting energy and flame characteristics of detonators and detonating fuse
B. M. P. Pingua, Nabiullah, G. D. Mishra, and K. L. Patel


Explosives and its accessories are the cheapest source of energy to excavate the rock for mining industry. On detonation, explosives and blasting accessories produce various types of energy like shock, gas, light, heat, sound, seismic etc,. A good energy product enhances the production and productivity of the mine. It has been experienced that the open pit mining operations are feasible up to 90 m depth and below this it is neither economical nor technically convenient. Therefore, it is essential to dig out the coal through underground mining operations below this depth to fulfill the demand of power. An underground coal-mine contains methane air mixture and coal dust which are highly inflammable in nature. During blasting they may ignite and causes accidents. Every year, in India and abroad many accidents occur in underground coal mines during the firing of explosive and its accessories. The flame characteristics and detonation temperature of explosives and its accessories are mainly responsible for the ignition of methane air mixture and coal dust. In this paper authors have studied the under water blasting energy and flame characteristics of detonators and detonating fuse which are used in underground mining operation, in detail.

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Shock energy, Gas energy, Explosion flame, Flame speed, Flame duration.  

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