Abstract
Strainbursts are the most frequently encountered rockburst in underground mines. Conventional approach to support strainburst-prone ground is to install rock reinforcement system using rebar and wire mesh first and then install yielding support system using dynamic rockbolts at a later stage. This two-stage rock support installation process is not safe and effective because it can adversely impact worker’s safety and mine production schedule.Two new patented dynamic rockbolts for reinforcing and holding rock masses, which are called Superbolts, were developed for safe and rapid tunneling in burst-prone grounds. Laboratory testing was conducted to confirm the design. The new rockbolts are characterized by high reinforcement load capacity, high shear resistance capacity, high dynamic energy absorption capacity, and the ability to withstand repeated dynamic loadings. The new rockbolts can be used in cost-effective support systems in burst-prone grounds. Most importantly, they are quick to install and can be used in a one-pass rock support system to facilitate safe and rapid tunnel development in underground mines and increase mine safety and productivity.
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