Roy, S.K. and Singh, R. R. (2011) Use of spacer aided initiation technique in solid blasting in Indian underground coal mines. transactions of the Institution of Mining & Metallurgy Sec. A, Mining Technology, 120 (1). pp. 25-35. ISSN 0371-7844

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Solid blasting mining methods contribute about 60% of total underground coal production in India. Spacer aided initiation technique utilizes the inherent air gap sensitivity of the explosive to distribute the blast energy over a longer length by the use of air decking using plastic spacers with single priming to achieve higher pull in solid blasting. The results of exploratory field trials of the use of spacer aided initiation technique in solid blasting with a specially developed pentadyne-HP explosive conducted in an underground mine concluded theat it was possible to achieve a pull of up to 2.2 m and yield up to 41 t per blast in a development face. Based on results of the studies conducted by authors, statutory authority for mines safety in India granted approval for commercial use of this technique with Pentadyne-HP explosive in all the degree I gassy underground coal miens.

Item Type: Article
Uncontrolled Keywords: Solid blasting, Permitted explosives, Air decking, Pull, Air gap sensitivity, Spacer aided initiation, Spacer
Subjects: Explosive and Explosion
Depositing User: Dr. Satyendra Kumar Singh
Date Deposited: 27 Dec 2011 05:19
Last Modified: 22 Feb 2012 05:36

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