PROJECT TRINIDAD EXPLOSIVE EXCAVATION OF RAILROAD CUTS 2 AND 3 BY MOUNDING AND DIRECTED BLASTING

摘要

This report summarizes the objectives, design, and results of two explosive excavation experiments performed as the final phase of Project Trinidad, a comprehensive series of tests to determine the cratering properties of inter-bedded sandstones and shales. The experiments were performed in September 1971 by the U.S. Army Engineer Waterways Experiment Station Explosive Excavation Research Laboratory. These final experiments were designed to excavate through-cuts for relocation of the Colorado and Wyoming Railroad at the Trinidad .Dam and Lake Project. The first of the two experiments tested a charge array designed to break up material within a 19,000-yd3 cut to facilitate .later removal of the material by mechanical means. The concept tested was mounding, a blasting technique An which charges are positioned with respect to the horizontal ground surface rather than a vertical bench face.