Research on the risk hierarchical assessment of rock burst of heading face based on acoustic emission and electromagnetic wave CT system

At present,rock burst happened in heading face frequently. This paper analyzed the advantages and limita- tions of existing evaluation methods in the application at heading face,and a hierarchical risk assessment method of heading face based on acoustic emission real-time monitoring and electromagnetic wave CT accurate detection was pro- posed. This method decomposed rock burst risk assessment target in time and space. Time layer of the method was de- termined by acoustic emission real-time monitoring,and the space layer of the method was determined by electromag- netic wave CT detection. The execution result of time layer was used as the criterion of the execution of the spatial lay- er. The shortcomings of the evaluation method based on single monitoring or detecting method in application at heading face were overcome. Dual functions of early warning of rock burst and danger zone division were realized,and the effi- ciency and accuracy of rock burst assessment were improved,and the actual pressure relief work on site was guided.