The Study For Iron Ore Slope Erosion Characteristics Under Action Of Water Flow

In slope is 15°,20°and 25°, water flow rate of 1.5 L/min,2.0 L/min and 2.5 L/min cases, the flow of iron ore slope erosion simulation test, study the regularity of the runoff and sediment yield, particle migration characteristics of slope and water-sediment relationship. The results show that:(1) Under the action of steady flow scouring, iron ore slope particle migration has paroxysmal and volatility, but also has a certain degree of rapid and sudden. (2) By the experimental results, the side slope of different gradient and flow sediment yield will be increased with the increase of the terrain slope and the water flow increases, according to the following order: M25°> M20°> M15°, M2.5L/min > M2.0L/min > M1.5L/min.Production flowaccording to the following order: Q25°> Q20°> Q15°, Q2.5L/min> Q2.0L/Min > Q1.5L/Min.But when the flow rate of 2.5 L/min, Q20°> Q25°> Q15°.(3) Slope surface runoff was mainly affected by changing flow time, in the iron ore slope of different gradient and flow gradient particle migration and the differences of characteristics. Small slope, low flow conditions, the slope particle migration mainly divided into three stages: the early stage of creep deformation, stable middle erosion migration stage and late stage of migration. Large slope, high flow conditions, there are mainly two massive slide erosion migration and stable migration phase, sudden slope particle migration is more obvious and strong. (4) Statistical analysis of experimental data, different slope and flow downhill surface accumulated sediment yield and better power function relation with the cumulative runoff are:y = axb; Under the effect of small flow, the slope is a more significant contribution to the change of slope surface erosion, and with the increase of traffic, slope is no longer a major increase of slope surface erosion.