Failure Mechanism And Stability Evaluation Of The Zhongling High Slope Deformation On Mine Area In Nayong County

Southwest of China is rich in coal resources, the exploitation of coal resources,promotes regional economic development, but also destroys the natural environment.In December3,2004, Guizhou province Nayong County bristle Ling Zhen Zuo JiaYing Yan Jiao Cun collapse and induced landslides, causing major losses. Through fieldinvestigation, there are obvious signs of deformation in the bristle Ling Zhen Zuo JiaYing also exist everywhere in slope, which in the ridge region occurred in4and2largercollapse. For the protection of the local people’s life and property safety, research needsof ridge slope deformation and failure mechanism and stability.Based on the geological disaster prevention and the State Key Laboratory ofenvironmental protection (Chengdu University of Technology) research project"Guizhou Province geological disaster monitoring and early warning and decisionsupport research platform-two: Guizhou province collapse mechanism of formationof" landslide hazards, selected Nayong County bristle Ling Zhen Ling landslide as theobject of study. The main research contents and results are as follows:（1）Through the analysis of regional geological background, the landslide arealandform, lithology and geological structure, strata weathering and unloading,hydrogeology, new tectonic movement, earthquake and other characteristics, deepenthe geological conditions of ridge collapse in Nayong, the establishment of geologicalprototype.（2） Through the analysis of the high slope of ridge structure, the uniqueridge in Nayong area, steep landform and hard structure of slope soft control is the mainfactor of area collapse; the characteristics of the high slope of Ridge Mountains crackand bottom Accumulation Distribution Characteristics of Rock Hill, the crack from thebottom of the mining, deformation of ridge slope instability mode for dumping type.. （3）Theuseofthree-dimensional finiteelement analysis，revealedtheevolutionand characteristics of the stress the Nayong Ridge Slope natural state. The results showthat the ridge slope into the slope process sloping shoulder has formed a tensile stresszone，the slope deformation trend of a decline in the trend； Stress on the slope ismainly concentrated on the upper part of hard rock，this is the main reason for theupper part of the rock mass destruction； Mined coal mining activities at the bottom ofthe ramp area was further enlarged，deepened the upper area of the tensile stress zone.（4）The slope stability evaluation of the use of strength reduction show thatNayong Ridge rock slope will remain under steady state in the future，collapse mayoccur again at any time. It should strengthen the monitoring，the establishment of earlywarning and evacuation measures...