Study On The Structure Parameters Of The Boring Field In The Sublevel Caving Of The Caixian Iron Mine In

Because of its high degree of mechanization, stope structure and production process is simple, easy to manage job security, strength and low cost of mining exploration, sublevel caving method is underground mining of iron ore is the most used an efficient mining method. But the presence of the mining ore loss and ore dilution method of serious problems, production practices show that China Sublevel caving recovery of approximately 80% of the ore, ore loss rate of about 15% to 20%, ore dilution rate about 20% to 30%. Selecting appropriate structural parameters not only directly affect the exploration, mining and engineering associate prepare recovery amount, but also a direct impact on the effect of ore recovery and recycling targets, so the full impact of the technical and economic indicators and the benefits of mining.In this paper, Yunnan Asan idea of iron ore for the study, research and computer simulation of the theoretical study of the structural parameters of Sublevel Caving, depleted loss calculation to determine the optimal structure of the iron ore to read parameters for the actual production of the mine to bring guidance.Dilution Loss Calculation indicators is Sublevel Caving Mining theory put important content, is one of the indicators of structural parameters of the merits of the judgment. Based on the original release of the body of rock mixed with positive dilution rate is calculated on the basis of further release summarizes the top body of rock mixed with the dilution rate, side rock mixed with the dilution rate and multi-directional rock mixed with dilution rate is calculated, and a variety of poor the formula of the circumstances under ore recovery, a comprehensive system for calculating losses were depleted indicators provide a convenience.In this paper, the structural parameters optimization Sublevel caving theoretical research on Sublevel caving structural parameters including mining approach arrangement and shape and size, highly segmented, route distance, step ore from the end wall inclination, scooping manner and depth, while hole angle and other factors described in detail. Gives the standard to determine the optimal structure parameters and methods, and the concept of optimal structural parameters of iron ore industry eccentricity and laboratory test curve curves were calculated according to the eccentricity.In order to verify the theoretical analysis to calculate the optimal structural parameters of the correctness of the concept According to the actual situation of iron ore, design, analysis, work out six possible combinations of programs stope structural parameters, the use of numerical simulation software release PFC2D ore, final segment highly recommended spacing 15m and ore pitches 5-6m of stope structural parameter combinations for 15m, into the road.