Research Of Landslide Monitoring Early Warning Based On Sonic Technology

With the development of human society, the ability to transform nature is greatlyimproved, at the same time, the pace gradually accelerate. Essential economic base ofthe national major projects have been provided by the development of economic in thewhole world. At present, many of the projects we carried out will inevitably related tothe mountain and slope excavation, such as transportation, national defense, utilities,major water conservancy projects, and so on. In addition, rock’s inherent stabilitywould be destroyed by the day-to-day activities of people in the mountain. Thustriggered secondary disasters such as landslides, mudslides caused significant life andproperty damage each year to the people of the world. It is in urgent need of anequipment monitoring of landslides, mudslides and other natural disasters, due to theurgent needs of the painful lessons of history and social development,to understand andmaster the evolution of the sliding masses in real time,timely to capture ofslump-feature information of the disaster,to provide reliable information and scientificbasis for the correct analysis and the evaluation of the collapse of the landslide,forecasting and control projects,and to provide a reliable guarantee for the people oflife and property safety. At the same time, the monitoring result also is the collapse ofthe scale of the analysis and evaluation of landslide and landslide control effect. Bymonitoring the deformation characteristics and laws of the controllable collapse andlandslide, predictive forecasting the boundary conditions of the slumped mass, scale,sliding direction, failure modes, time of occurrence and harmfulness, to take disasterprevention measures to prevent and reduce disaster losses.Landslide Pro slip monitoring not only include landslide Pro slip survey, animportant part of the research and preventive treatment project,but also an effective means of access to the landslide disaster forecasting information. By monitoringmastered landslide, collapse deformation characteristics and the law, forecasting andPrediction landslide Pro slip boundary condition, size, sliding direction, failure modes,occurrence time and harmfulness, then take timely prevention measures to avoid andmitigate landslide disaster losses.This paper mainly completed research work and research achievements are asfollows:1. The study of the landslide acoustic characteristics.Collect and detect metamorphosis typical landslide Pro slip sonic characteristics,analyze and summarize the characteristics and laws of the acoustic signals of differentdeformation stage of the landslide,summed up the conclusion that sound wavesgenerated by the landslide Pro slip stage of rock fracture and friction are mainlyconcentrated in the acoustic part (2~15Hz).2. Design of system programAccording to the study of the system design, selected the pressure field to collectinfrasound and acoustic sensors,designed acoustic information collection and signalprocessing circuit, automated monitoring and early warning system program,andsuccessfully developed the CUT-8000geological disasters acoustic monitoring system,completed the acquisition of the landslide acoustic information.3. Study of system hardware and softwareThrough the system hardware, software design, achieved:(1) Landslide acoustic information collection.The use of sound waves generated by the landslide Pro slippery rock fracture andfriction for landslide monitoring, the landslide Pro slip early harbinger of informationin a timely manner. The landslide acoustic monitoring system sensor selected forDenmark B&K pressure field of acoustic sensors, the frequency response range of0.1Hz~20k Hz, sensitivity12.5mV/Pa.(2) Analog and digital processing of acoustic signalsThis system mainly consists of signal acquisition and data processing part of thetwo components.The signal acquisition is the acquisition and transmission of acousticsignals generated by the landslide Pro slippery rock fracture and friction. Dataprocessing part of the acquisition of the signal spectral analysis and the effectivesignal extraction, and thus lay the foundation for the landslide acoustic characteristicsand distinguish. (3) The study of landslide acoustic characteristics.To collect and detect the deformation of a typical landslide acoustic features,analyze and summarize the characteristics and laws of the acoustic signals of differentdeformation stage of the landslide.(4) The establishment of early warning model of the landslide acousticwaveform.According to the landslide instance of the various types of acoustic informationcollected,to establish the landslide acoustic waveform of the early warning model, toprovide technical assurance for landslide hazard Pro slip the perfection of theautomatic warning devices.