Study On Optimization Of The Stope Structure Parameter Of Upward Layered And Full Tailings Cemented Method

With the constant increase of the mankind demanding the mineral products, the mineral resource becomes fewer and fewer. How to carry on the development and utilization of mineral products resources rationally, high-efficiently, frugally, safely and reduce losses of resource and dilution of ore and enhance quality of ore is the question of the mineral resources developer caring about. Filling mining technology has made a break through in our mining mineral deposit of high value with high ore recovery and low dilution and appeared no-trolley mechanized to filling method of stabilized tailing (upward bed and downward pathway), dot-post filling method, subsection filling method, large aperture open stope (mining) method and filling empty with stabilized tailing filling (block stabilized) and so on. Meanwhile, the computer applied to research filling body and mechanics function mechanism provides the basis for the design and production. This paper combinations mining technology transformation projects of the gold mine in Hebei, to seek suitable mining method for the mine of high grade, high value of steeply inclined thin and medium-thick orebody of noble metal. By theoretical analysis, numerical simulation method, this paper optimizations the stope structure parameter. The main results:(1)By analyzing the research results of rock mechanics at home and abroad and cemented fill mining method on the deep underground stope roof down principles to determine the mechanism of action of the backfill design strength and backfill.(2) In order to reduce the loss rate and dilution rate of the ore occurrence conditions of the ore body, mining conditions, mine the status quo, layered on to the tailings backfill method selected by economic and technological, and mining within180m middle of the field test, continuous along the strike of the layout of stope mining.(3) Determine the backfill to meet the production requirements of strength, starting from the stope backfill the mechanical properties of the ratio test of the filling material in the laboratory by experimental analysis of the gold mine full of tailings cement filling the physical and mechanic summed up the main factors affecting the strength of the backfill, sand-lime ratio and the concentration of slurry, sand-lime than the higher the greater the concentration, the greater the intensity of the backfill. According to the actual situation of the gold, the paper select tailings for filling aggregate, cement for the gelling agent, sand-lime ratio of the1:4,1:6the slurry filling.(4) Because of the mine having no division level hierarchical mining stope and pillar, resulting in the exposure of the large area of the roof, ensuing safety and effective mining ore using FLAC-3D numerical simulation software on a different face structure parameters reasonable stope structure parameters and the simulation obtained to the the stratification whole tailings filling the gold mine after the production, designed to provide a basic.