Hard Rock Tunneling System Evaluation and Computer Simulation

摘要

An analysis of underground excavation is presented. Tunneling is emphasized because it is shown that tunneling is the major part of military and civil defense projects specifying underground facilities. The factors which affect the design and performance of an excavation system are discussed. Geological prediction techniques and research are surveyed to identify promise of measurable improvement. An approach to modeling the tunneling process is developed; this formulates a modular structure of a computer simulation to represent any one of many excavation system possibilities. The first set of mathematical relationships which model rock fragmentation by boring machine, drill-and-blast, pellet impact, and water jet are derived. (Author)