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Short-Delay Blasting in Underground Coal Mines

By Mainiero, Richard J.

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Book Id: WPLBN0000134409
Format Type: PDF eBook
File Size: 2.0 MB
Reproduction Date: 2005
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Title: Short-Delay Blasting in Underground Coal Mines  
Author: Mainiero, Richard J.
Volume:
Language: English
Subject: Health., Medical research, Medical reports
Collections: Medical Library Collection
Historic
Publication Date:
Publisher: Centers for Disease Control and Prevention

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Mainiero, R. J. (n.d.). Short-Delay Blasting in Underground Coal Mines. Retrieved from http://netlibrary.ws/


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Table of Contents
CONTENTS Page Abstract....................................................................... Introduction................................................................... Experimental ExDpeelraiym etnitmael psrtoguradm.y.... ...................................................................................... ............................. Hole spacing study.. ......................................................... Discussion and conclusion...................................................... Bibliography ................................................................... ILLUSTRATIONS Uncovered coal seam in which initial research was conducted................ Pit in which highwall shots were fired..................................... Layout of the 12-hole, slab-round, shot pattern used in delay blasting research.................................................................. Face loaded and ready for firing ........................................... The steel and plastic incendivity test gallery in place against the highwall face..............,............................,..................... Gallery in place against the highwall face................................. Coal broken by a typical shot in the uncovered coal seam................... Planned ignition of incendivity test gallery in a shot against the highwall face...................................................................... A later stage of the ignition shown in figure 8............................ TABLES 1. Summary of 12-hole gallery shots stemmed with 2 ft of clay and rear primed. 2. Permissible explosives used in delay blasting research..................... 3. Results of misfire research in Bruceton Experimental Coal Mine............. 4. Results of misfire research at Dark Hollow Mine............................

 

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