Colorado School of Mines Quarterly, 81(3):1–50, July 1986
Authors: J. F. T. Agapito (AAI)

During the last three decades, the mining and construction industries have required that underground openings be increased in size. In mining, the larger equipment needed for higher productivity has made necessary the excavation of larger openings. In the construction industry, an increased number of larger openings has been required for power stations, tunnels, storage chambers, and military installations. In many cases, these excavations have been made in competent, jointed rocks. The purpose of this monograph is to provide applications from a case study in an area of rock mechanics where there is little available information—pillar stability in large underground openings excavated in competent, jointed rocks.

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