MONITORING AND IMPACT ANALYSIS OF SEISMIC EFFECTS OF MINE BLASTING IN TONGLING PRISON STONE FACTORY
In order to provide direct and objective measurement for the scientific analysis of blasting effect,the monitoring data are obtained comprehensively and truly by using seismic professional in-struments,and the factors related to blasting effect are found out,and the risk prevention measures are put forward.Starting from the key parameters such as blasting vibration velocity,energy attenua-tion and dominant frequency,the H/V spectral ratio method is used to evaluate the influence of site response.The blasting magnitude is used to verify and check the blasting energy,and the energy at-tenuation law in this area is obtained by fitting.The energy distribution and dominant frequency law are obtained by waveform time-frequency analysis.Through the monitoring and analysis of mine blas-ting,it is concluded that the blasting energy,intensity,velocity and acceleration decrease with the increase of distance.The intensity increases with height on different floors of the same building;The maximum vibration speed recorded by the instrument is lower than that specified in Blasting Safety Regulations;Blasting has little effect on the earthquake damage of the surrounding buildings,but it is necessary to consider the long-term impact of blasting vibration on the self-built brick and earth house,and the long-term impact on the decoration and external tiles of the brick and concrete house.The monitoring test shows that it is feasible to develop the method of seismic effect monitoring and impact analysis of blasting,and the results can be used to guide mine safety production.
万方数据
维普
