South Open Pit The Space-time Characteristics Of Soil And Water Loss Disaster Research In Jindui

Soil and water loss of geological disasters in our country is facing the serious ecologicalenvironment problems, gold heap south open-pit mine human activities more violent, on thesurface of the soil and vegetation destroyed. Mining area in the southern margin o f the qinlinglow mountainous area, in the regionSecond is given priority to with water erosion, gravity erosion and water erosion of slopesurface erosion is one of the main form. Based on the research of the mechanism of slopesurface erosion process was the key to prevention and control of soil and water loss. Thispaper, by means of outdoor simulation scouring experiment, the system analysis of thesimulation of the surface roughness under scouring changes under different vegetationcoverage, runoff of slope runoff and sediment yield process and space-time change rule,finally puts forward the corresponding control measures. Mainly has the following mainconclusions:(1) on the comprehensive analysis of the test data and field investigation, gold heapsouth open-pit mine due to human activities, such as mining surface such as vegetationdestruction, soil erosion is serious geological disasters.(2) based on the influence of roughness of runoff erosion, can be concluded that with theincrease of surface roughness, runoff of depressions of the filling time and the runoff yield thelate time. The surface roughness is relatively hours, runoff yield a relatively short time, andstable relative to the surface roughness after volatile.(3) in three kinds of coverage, the production flow of the size of the order for the stripedcloth> bare slope> grass; The size of the sediment yield sequence for bare slope>grassland> striped cloth. Maximum of grassland soil and water conservation and reducesediment and runoff reduction effect is remarkable. The rainfall intensity, the greater theimpact on soil and water loss, the greater the sediment yield and production flow.(4) the space-time characteristics of soil erosion is mainly for the top of the slope surfaceerosion and sediment yield of active region, mainly for the central surface erosion is givenpriority to, accompanied by certain gully erosion, the basic for the surface at the bottom of theslope surface erosion is given priority to. Early in the scour a nd sediment mainly comes from the lower part of the slope, as the scour for continued, erosion and sediment yield is mainlyappear in the middle and top, the roof as the main production in sand.(5) in the following areas prone to heap gold mining area of soil and water loss ofgeological disasters:①in the north of mine;②the south open-pit mining area;③the road ditchmine;④south open phase ii mining area;⑤Production road6flip station, etc.