Computer Random Simulation In Drawing Research Of Large Space Non-pillar New Caving

In long time, the small structure parameter that was 10m×10m was adopted by non-pillar mine in our country, which restricted the advantage of non-pillar to exert and oursublevel mine to develop.The research and application of the large space non-pillar mineral technique made thestructure parameter and other technique produce important change, which enriched the oredrawing. By comparing with the small structure parameter, the large space parameter issuper in some aspects, such as improving mining intention, and reducing preparatory work,and debasing mining cost. It is important to researching the large space non-pillar mineraltechnique especially its parameter.Based on the large space theoretic research, this thesis focuses on the research of themovement law of broken ore and rock, according to the large space structure parameter ofthe Beiminghe Iron Mine. The systematic researches are as follows: First, Based on theVisual Basic 6.0 program, ore drawing simulative programming was written upon theimproved random medial theory and simulative maths model. Second, using self-madeprogramming, simulative analysis has done on the structure parameters of various accessspaces, under the condition of the fixed sublevel height of Beiminghe. Third, a detailedstudy of the relationship between access space and ore loss and dilution has been made.The optimized parameter has the mining intention improved, the preparatory workreduced, and the mining cost debased. By research and analysis, the paper draw aconclusion that is the better large space structure parameter of 15m sublevel height whichis 18m~19m. The best structure parameter is 15m×19m.