Abstract
Rock burst represents a very dangerous phenomenon in deep underground mining, as well as for underground structures in unfavourable conditions (great depth, high horizontal stress, proximity of major tectonic structures, etc.). The rock burst problem relates to the natural and mining conditions of the rock mass. The evaluation of rock burst is becoming increasingly important as mining activities reach greater depths. In the literature, rock burst assessment challenge was tackled by many researchers using various methods. However, no study providing review and comparison of different rock burst assessment methods is available. In this paper, rock burst classification is briefly summarized. This includes a classification based on rock burst type, and another classification based on rock burst severity. As an important method for rock burst prevention, some novel energy-absorbing bolts were developed. These bolts demonstrate constant resistance under both static and shock loads and large elongation ability enabling them to withstand large deformations of rock masses under rock burst-prone conditions. Among the novel energy absorbing bolts, Modified Cone Bolt (MCB) and Constant Resistance at Large Deformation (CRLD) Bolt are selected to be presented in this paper.
Highlights
Rock burst is an unstable rock failure and one of the most hazardous problems in deep mines and civil tunnels
This paper focuses on providing the reader with a complete review of rock burst classification and some dynamic rockbolts to control rock burst
Rock burst classification by type can be based on different parameters such as:
Summary
Rock burst is an unstable rock failure and one of the most hazardous problems in deep mines and civil tunnels. Rock burst frequently occurs at excavation faces or in a working panel of an underground excavation at great depth It can cause mechanical damage, delays of projects, and economic losses.
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