Open AccessRock Burst and Actually Effective Bolting for Rock Burst Prevention
Author(s) -
Ngoc Minh Nguyen,
Duc Thang Pham
Publication year - 2019
Publication title -
gornye nauki i tehnologii
Language(s) - English
Resource type - Journals
ISSN - 2500-0632
DOI - 10.17073/2500-0632-2019-2-103-110
Subject(s) - rock burst , rock mass classification , geotechnical engineering , geology , rock bolt , mining engineering , engineering , coal mining , coal , waste management
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.