The New Method Study Of Using Background Noise For Underground Engineering Safety Monitoring

At present,the problem of underground project construction safety increasingly highlight,underground the stability of surrounding rock is the focus in the underground engineering construction process,the main points of the perfect safety monitoring system is the guarantee of underground construction smoothly and the necessary means of life and property safety.Microseismic monitoring technique is based on the collected seismic signal filtering,analyzing,positioning,extract the information carried by the deformation.This article will microseismic monitoring technology and the technology of background noise,combining the theory of seismic wave attenuation,to explore the background noise analysis method based on the micro seismic monitoring system for safety monitoring of underground engineering in the construction process of the feasibility and applicability are the core and key of this study.First of all,this paper systematically introduces the principle of microseismic monitoring technology,signal time-frequency analysis method,the background noise technology theory and seismic wave energy attenuation sex research method,and combined with these methods,the formation of background noise attenuation characteristic analysis as the core of the underground rock medium stability analysis method,this method takes the attenuation gradient elements as the main parameters,by attenuation of unconformity characteristics of underground rock mass stability changes reflect.Secondly,this article adopts the method of numerical simulation,the time-frequency analysis method of comparison analysis,tap on a test signal analysis simulation,ricker wavelet attenuation,the change of the simulation,the stability of surrounding rock under the attenuation gradient imaging simulation.Ontology through multiple simulation,demonstrates the feasibility and effectiveness of the new method.Finally,in the crane on the left bank of letan hydropower station tail water connecting pipe for 88 days of micro seismic safety monitoring,this paper,new method was applied to the monitoring of the actual data processing,construction process of surrounding rock stability to the region for attenuation gradient imaging.