Research on landslide early warning system based on monitoring data and mechanical mechanism dual drive
Taking the mountain project above Xiaoniu Coal Mine in Aga Town,Shuicheng County as the background,a feasibility study scheme based on"space-ground-geography"collaborative field test was proposed.The destruction of landslides is often accompanied by the cumulative effect of slope toe damage caused by rainfall.It is very important to study the failure mode and instability mechanism of rainfall-induced landslides.The study used numerical analysis and field tests to examine the evolution of rainfall-induced landslides.A variety of instruments(GNSS sensors,rainfall sensors,acceleration sensors,crack meters,etc.)were used to conduct field tests on the slope stability of rainfall,revealing the regularity of slope deformation under rainfall conditions due to the evolution mechanism of surface subsidence after underground mining.In addition,the relationship between rainfall and rock saturation and plastic failure state under rainfall conditions was analyzed by numerical simulation.The results show that the variation law of surface subsidence,acceleration,cracks and rainfall in the surface subsidence section after mining is consistent with the evolution process of landslide,indicating that surface subsidence,cracks and acceleration can be used as the criterion of landslide instability,and the stability of slope toe plays an important role in controlling landslide stability.It is concluded that with the increase of rainfall,the influence range of seepage becomes larger and larger,and the time of rainwater reaching the slip zone becomes shorter and shorter.When the rainfall reaches a certain val-ue,the existing ground stress balance is broken and the landslide occurs.The landslide surface where the landslide occurs is at the junc-tion of the rock mass or through the fracture zone.If the landslide surface is shallower from the surface,the rainfall is greater,and the time required for the landslide is shorter,resulting in a shorter early warning time.Therefore,timely attention and analysis of rainfall and rock strata handover location are the key factors for effective early warning of landslides.
landsliderainfallmonitoring equipmentearly warning model
万方数据
维普
