Development in steel roadway support--a success story

摘要

The article gives a short chronological review of the development concepts and improvements in steel roadway support. The successful standardisation concept of RAG and currently used support systems are further importantm , topics. The history of optimising the material properties for the steel arch support with different alloys up to the tempering used today is discussed. The present-day application of the steel support is additionally presented. Today, it represents a system component of modern roadway support for highly stressed roadways. In addition to the yielding roadway arch support, this overall system - the combination support - consists of the additional components of a rockbolt system and concrete backfilling. The comparison of the application areas for each individual partial system with the overall system illustrates its high performance capability. Understanding the complete system permits the selection of the economically optimal support for all conditions.