Study On Benefits Of Soil And Water Conservation Slag Heap Slope Revetment Two Measures

With the increasing of unreasonable exploitation, open-pit mine which is one kind of scarce mineral resource is suffering from serious damage Because the damaged mine can easily trigger natural disasters such as landslide, debris flow, collapse, and so on, it has become a extremely urgent environmental problem. Loose deposit slope with the characteristics of instability, large soil porosity is prone to cause soil erosion which is threatening human life and safety and restricting the social and economic development. in order to solve those problems, by using artificial rainfall simulation experiment with the rainfall intensity of 30,60,120 mm·h-1, rainfall experiments were conducted to measure the laws of sediment, runoff generation,the benefits of flow and sediment reduction. Two slope protection measures artificial of ecological bags and bamboo fence and Sloping with 15°、30°、 45°were chosen to provide theoretical basis for the mine slope.The results proved that:1.Law of runoff and sediment yield under different protection measures.With superior effect on slope protection compared to other slope protection measures, bamboo fence and ecological bags can be wildly used in production practice. The bamboo fence showed better effect on blocking runoff and sediment, while the ecological bag has obvious protection on the lower soil structure.2.Soil runoff and sediment yield rules with different gradients.With the bamboo fence protective measure, the runoff yield increase obviously with the growth of gradient, but the growth of sediment yield is not so obvious; On soil layer, production flow and sediment yield increased both. On the slag layer, production flow increases, the sediment yield increase but not obvious. With Ecological protection measure,Both of runoff and sediment yield increase with the growth of gradient.The yield of the ground surface flow, sediment yield change is unconspicuous. On soil layer, production flow and sediment yield both are increased. On the slag layer, production flow increases and the sediment yield are reduced.3.Benefit analysis on flow and sediment reduction with different protective measuresDifferent slope revetment measures give rise to various runoff and sediment reduction benefit.Under different rainfall intensity condition, the linear relationship between runoff yield and sediment yield shows that: the bamboo fence measure has better flow reduction benefit (Pri=15.84%) and the ecological bag has superior sediment reduction benefit (Pri=24.97%)...