Study On Fluidifying THeory Of Large Highspeed Rockslide

Recent years, many large high-speed rockslides burst forth in succession allover the world. These landslides go with fluidization peculiarity different degree incourse of their motion, and their speed and distance increase several times because ofthe fiuidization, thereby the disaster area greatly broaden. On the base of above, thepaPer studies systematically the fluidization of large high-speed rockslides in all itsaspects: analyzed the aerodynamic effect in the short-range on the base of the windturmel experiment, studied the effect of falling into pieces when landslides collidesmountain; studied the accelerating effect through high-speed collide experiment oflandslides model; and the paPer reaPpear the overall process including set-out,collide in the short range, debris flow in the long-range of TOuzhai large landslide viadistinct element method(DEM), studied the flow law and equation of different typeof debris flow resulted from large landslide. As a sample to apply, the paPer analyzedfluidization mechanism of Touzhai landslide. The research work involves severalaspect as follows:l. Most of large landslides acquire high-speed in the phase of set-out, so thelandslides fly in the air after go away the slip plane. In the course of fiying, theaerodynaxnic effect occur on the landslide. During long-range, debris flow is mainmovement form of the landslide because of the colliding that result in the effect offal1ing into pieces and accelerating. Consequently, fluidization is the evident motionfeature of the 1arge high-speed landslides.2. The model experiment aimed at the aerodynamic effect of large high-speedlandslides has been accomplished in wind tunnel laboratory for the first time. On thebase of testing research, the paPer studies different factor which influence theaerodynaxnic effect of flying 1andslide, and numerically simulates the aerodynamiceffect with the help of the hydrodynamics finite element. Finally, the paPer putsforwards the differential equation in the course of fiying of large landslide.3. Applying strain-energy distributing theory during col1iding and energy rulerduring colliding, the paPer put fOrwards the critical velocity equation whichrock-mass destroy when colliding occuf, and other severa1 equations to make certainaverage velocity and motion direction after collide. At the same time, the equation tomake certain the value of energy to make rock-mass destroy has been deducted, andon the base of this, the paper brings fOrward the equation to calculate averagediameter after rock-mass falls into pieces by the way of word-cost theory.Accordingly, the paper perfectly studies the effect of falling into pieces in the courseof landslide colliding.4. Achieved the high-speed colliding experiment of landslide for the first time, the paper studies the volume distributing ruler of different velocity segment after collide, fits the experiment data via EXTREME function, obtains the value range of the shape parameter, thereby gets the distributing function of all part of landslide after collide. On the base of above, the paper studies the accelerating effect of partial rock-mass because of colliding, and acquires the relation between accelerating volume and overall volume, and colliding velocity.5. Through DEM numerical simulation, the paper visually reveals and reappears the movement of Touzhai large high-speed landslide after destroy, and the effect of falling into pieces and accelerating of partial rock-mass after collide the mountain.6. On the base of the two-phase flow theory, the paper studies the velocity distributing of solid-liquid two-phase flow, acquires the distributing function of velocity and consistence, on the other hand, studies the loosing during flow, and gets the movement equation of solid-liquid two-phase flow. Finally, the paper analyzes the flow characters of solid-gas two-phase flow, put forwards the Boltzmann equation, gets the critical condition of slope angle tg a > tg...