(10A-4) DEVELOPMENT OF HOT ROLLED COIL OF 540 MPA CLASS HIGH STRENGTH LOW ALLOY STEEL FOR ROCK BOLT APPLICATIONS

摘要

Steels are widely used as raw material in many applications, which one of them is as a raw material for rock bolt in mining application. In Indonesia, the steel for this application is also commonly used since several years ago. Rock bolt is a long anchor bolt, for stabilizing rock excavations, which may be tunnels or rock cuts. Steel for rock bolt application requires not only high strength but also good stiffness and small deflection to ensure the rock bolt did not pulled up after being pre-loaded. The requirement of mechanical properties of the steel can be fulfilled by chemical composition adjustment and appropriate controlled rolling.