Safety and Cost Benefits from Improved High-wall Blasting Practice.
NTIS: PB/82-205691 :171 pages
This report presents the results of a program to improve unstable highwall conditions through better blasting practices in Appalachian strip coal mines using existing and proven technology. The objectives were better borehole blasting agent distribution and optimization of burden, spacing, and delay periods allowing satisfactory breakage with minimal backbreak. At a selected field site, geologic conditions were examined with regard to joint orientation and spacing, and resulting slope stability considerations. A test series of eight blasts was completed and the resultant highwall was monitored by repetitive photography. The study of drilling and blasting economics along with equipment performance led to an economic model of blast parameters and the identification of blast design cost and benefits.
CP; Final Contract Report;
NTIS Accession No.
Engineers International, Inc.