Abstract:
In order to solve the problem of rock burst induced by roadway excavation, the advance detection technology for roadway excavation is developed based on the principle of vibration wave CT inversion andSIRT algorithm,which can realize the real-time acquisition and CT inversion of underground active and passive seismic wave signals. This technology can monitor the advance position of the driving roadway and the source distribution of the working face area in real time,form the high-density ray coverage penetrating the coal seam,generate the large-scale and high-resolution wave velocity inversion nephogram,and then analyze the advance stress distribution of the driving roadway. Taking the 183 lower 05 driving face of Jisan coal mine as an example,the research shows that the inversion nephogram of seismic wave CT can obtain the distribution areas of stress concentration in advance of driving,which is proved to be a high stress dangerous concentration area using drilling cuttings method. This suggests that that the technology can detect the stress distribution around the driving head in real time.