Project R.D. Bailey Experimental Excavation Program

摘要

Results of the R. D. Bailey Lake Project experimental excavation program are presented. The experimental program was conducted at the site for the spillway of the R. D. Bailey Lake Project, near Justice, West Virginia, from February to August 1973. The primary objective of the experimental excavation program was to investigate the feasibility of using bulk explosives in blastholes larger than normally used in structural excavations, in conjunction with controlled blasting techniques, to reduce the cost of drilling and blasting. Other objectives were to obtain basic scientific data on blasting techniques and effects, and to provide the Huntington District and prospective bidders information and appropriate excavation techniques for the spillway at R. D. Bailey Lake. The experimental excavation included a comparison of the results obtained by blasting with ANFO and aluminized slurry in holes varying from 3 to 12 exp 1 / sub 4 in. in dia in shale and sandstone. During the course of the experiment, data were collected concerning fragmentation, ground shock, blast-induced fracturing, seismic motions, and airblast overpressures. This information has been analyzed in order to arrive at a better understanding of basic blasting mechanisms and side effects. The results of the experimental excavation were made available to contractors interested in bidding on the project to help them prepare estimates of the cost of spillway excavation. By reducing the uncertainties about the nature of the rock and its excavation characteristics, substantial savings were realized in the cost of the spillway excavation.