Forecasting Rock Burst by Using Seismological Computed Tomography in Coal Mines

摘要

On account of increasingly.frequent rock burst hazards at present, the theoretical basis of rock burst determination through P-wave velocity was analyzed based on the experiment relation model of stress and P-wave velocity.Meanwhile, the technology of rock burst risk assessment was established through seismic computed tomography detection, which contains assessment parameters of wave velocity anomaly An and wave velocity gradient anomaly VG.The criterion of these parameters was documented.Finally, the assessment technology was verified by practical application.Results show that P-wave velocity reflects the strength criterion, energy criterion and dynamic load criterion for rock burst as for the rock mass with the same properties.The seismic computed tomography detection technology is feasible for rock burst risk assessment.It can give guidance on the implement of risk relief measures and check the effect of the measures.