Surface mine blasting - make it work for you

Conference · Mon Dec 09 04:00:00 EST 1985 · Univ. Ky., Off. Eng. Serv., (Bull.); (United States)

OSTI ID:5375408

Massey, B A

Understanding the mechanics of blasting and its relationship to the mining operation as a whole underlie the most successful blasting programs. The apparent burden and spacing measured from the drill pattern may not necessarily be the effective burden and spacing during the blast. The detonation sequence of the holes can cause these measurements to change. The true spacing-to-burden relationship, shot timing, and explosive used will all affect overburden movement and breakage. Opinions vary regarding the proper selection of these variables for specific purposes. Cast blasting has received a renewed interest in the past few years, especially in surface coal mines. Improved fragmentation is often an extra benefit of casting. The principles of cast blasting may be used to open a key along the new highwall, improve productivity of truck operati, ons, and help directional spoil movement in special applications. 6 references4 figures

• Research Organization: NERCO Coal Corp.
• OSTI ID: 5375408
• Report Number(s): CONF-851213-
• Conference Information: Journal Name: Univ. Ky., Off. Eng. Serv., (Bull.); (United States)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100 -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
BLAST EFFECTS
COAL MINING
COMMINUTION
EXCAVATION
EXPLOSIONS
EXPLOSIVE FRACTURING
EXPLOSIVES
FRACTURING
MATERIALS HANDLING
MINING
OVERBURDEN
SURFACE MINING