Study On The Key Technology Of Backfill Fushun West Open Pit

Treatment of abandoned open pit has been a technical problem in the world.Fushun west open pit is one who has a one hundred mining history, the scale of the magnificent deep concave large open pit mine, It programs to be closed in2017, has entered the closure period now. After Fushun west open pit closed, leaves that to the city and the people is a big hole that is digged out more than cubic meters, and surrounded by tall and steep slope, will trigger a series of environmental and geological problems, the most prominent is the landslide slope and surrounding ground deformation problem, once the disaster occurs, damage and loss cause to Fushun City community and the people will be unable to estimate and irreparable. Therefore, the technical scheme provided that use the spoil of the adjacent Fushun East open-pit to backfill West Open-pit, not only the environmental and geological disasters may lead to be solved, but also realize the mine backfilling reclamation, increase the using land area, made Fushun achieve significant social, economic and ecological benefits. However, the technique of backfilling the Fushun West open pit mine is a difficult technical problem of innovation, the core problem is also studied in this thesis. This comprehensive application of field investigation, laboratory test, theoretical analysis, numerical simulation and other means, some key technical problems of backfill Fushun West Open-pit Mine are studied.According to the geological condition, the present situation and the original mode of transport and system arrangement of fushun west open pit, proposes four kinds of backfill is feasible.Through the technical and economic comparison,and select the reasonable economy "railway-excavator"+"railway-chute-front loader-car bulldozer"combined backfill scheme.The practicality, safety, environmental protection and economy as the principle of designing chute, through theoretical analysis and experimental research, proposed that the determine method of the number of the chute, chute angle position, section shape and size parameters of chute development transportation plan。Aiming at the safety problem of chute transportation process, establish slungshot leaping model, calculation the jumping distance and height of slungshot, provide theoretical basis for the determination of technical parameters of the walls.Aiming at dust pollution of chute system,the dust prevention measures of arranging protective net on the chute side wall is proposed, using numerical simulation method to study the chute dust transport diffusion law, thus to determine the technical parameters of protective net; through the experimental test, concentration distribution rule of chute system dust, proposed that installate wet dust suppression system in the the chute outlet.