State of the art review of the risk assessment and early warning methods for fault-slip rockburst

Abstract

Underground engineering generally needs to pass through a significant number of geological structure areas, which can easily induce fault-slip rockburst, threatening the engineering structure's stability.For revealing the mechanism of disaster causing of fault-slip rockburst, the geological structural conditions, spatiotemporal inoculation characteristics, disturbance triggering mechanism, risk assessment indicators and the early warning methods of fault-slip rockburst was systematically analyzed in this study.The results show that fault-slip rockburst mostly occurs in the geological structure area which containing the weak structural plane or bedding plane, and the hard structural surface controls the rockburst crater boundary.The fault-slip rockburst has typical spatiotemporal precursor characteristics.As a matter of fact, the acoustic emission (microseismic) monitoring parameters have a typical precursor of a "relatively quiet period" in the critical failure stage, and the infrared thermal image temperature will appear the phenomenon of short-term abnormality.The natural defect structure provides geological structure conditions for the occurrence of fault-slip rockburst, roadway tunneling provides a slip space for fault-slip rockburst, and the dynamic stress provides disturbance triggering conditions for triggering fault-slip rockburst.

Keywords

• underground engineering
• fault-slip rockburst
• risk assessment
• early warning method