Laboratory Evaluation of Cable Bolt Supports (in Two Parts). 1. Evaluation of Supports Using Conventional Cables

摘要

The U.S. Bureau of Mines is conducting research on cable bolt ground supports to assess their material and support properties, provide design criteria for using cable bolt supports as roof control systems under various types of underground mining conditions, and provide a mathematical model of cable bolt support systems. Part I describes laboratory studies of the support properties of cabLe bolts made of conventional steel cables and provides recommendations on such topics as the use of thick grouts, selections of breather tubes,and reduction of water bleeding in cement-based grouts.