Indexed by:
Abstract:
The prediction of rockbursts during the construction of underground caverns is of great significance to ensure the safety of construction workers and to arrange the construction progress rationally. In this paper, a rockburst prediction method combining rock mass structure analysis and electromagnetic emission monitoring is proposed. In the process of implementation, the possibility of rockburst is preliminarily judged by the observation of the excavation face and its nearby rock mass structure, the potential rockburst area is then monitored by using portable electromagnetic emission meter, and finally the possibility and intensity of rockburst can be further predicted based on the changes of the electromagnetic emission energy and pulse. The developed method, comprehensively considering the rock mass structure conditions of rockburst occurrence as well as the energy conversion and rock micro-fracture frequency during the process of rockburst, is easy to be mastered and applied by field technicians, and has proved to feasible for rockburst prediction during the construction of underground caverns. Taking the Central Asia's longest tunnel-Uzbekistan Kamchik tunnel as an example, the rockburst prediction method, including rock mass structural conditions of rockburst, key monitoring positions and method of electromagnetic emission, the electromagnetic emission interpretation indexes and reference value of rockburst, is systematically introduced. © 2020, Science Press. All right reserved.
Keyword:
Reprint 's Address:
Email:
Version:
Source :
Chinese Journal of Rock Mechanics and Engineering
ISSN: 1000-6915
CN: 42-1397/O3
Year: 2020
Issue: 2
Volume: 39
Page: 349-358
Cited Count:
SCOPUS Cited Count: 9
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
Affiliated Colleges: