基于地音与电磁波CT的掘进工作面冲击危险性层次化评价方法研究

目前掘进工作面冲击地压事故频发,通过分析各评价方法在掘进工作面应用中存在的优势与局限,建立了一种基于地音监测与电磁波CT探测的掘进工作面冲击危险性层次化评价方法;该方法将冲击危险性评价目标在时间和空间上进行分解,通过地音实时监测确定评价的时间层,通过电磁波CT探测确定评价的空间层,以时间层的执行结果做为空间层的执行判据,克服了基于单一监测或探测手段的评价方法在掘进工作面应用中存在的不足,实现了掘进工作面冲击地压实时预警及危险区域精准划分的双重功能,提高了掘进工作面冲击地压评价的效率与准确性,指导了现场实际卸压工作。

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

Abstract:At present,rock burst happened in heading face frequently. This paper analyzed the advantages and limitations 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 proposed. This method decomposed rock burst risk assessment target in time and space. Time layer of the method was determined by acoustic emission real-time monitoring,and the space layer of the method was determined by electromagnetic wave CT detection. The execution result of time layer was used as the criterion of the execution of the spatial layer. 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 efficiency and accuracy of rock burst assessment were improved,and the actual pressure relief work on site was guided.