非胶结充填采场压风强化脱水实验与数值模拟

摘要

Non-cemented backfilling in unclassified tailings is the most economical and efficient way of backfilling for the mine,whereas,the most difficult question of non-cemented backfilling in unclassified tailings is how to achieve fast and efficient dehydration for the non-cemented filing body.The mechanism of forced dehydration by pressing wind was studied,and a laboratory model was established according to the similarity principle.The technological parameters of forced dehydration,including parameters of dehydration tubes that provides theoretical guidance for the unclassified tailings non-cemented filling in the way of forced dehydration by pressing wind were explored by experiments.The numerical simulation analysis of forced dehydration was carried out by using the fluid dynamics simulation software FLUENT.The results reveal the migration regularity of gas and water in the process of forced dehydration and further validate feasibility of the forced dehydration by pressing wind in the unclassified tailings non-cemented backfilling.%全尾砂非胶结充填是矿山经济高效的充填方式,如何实现采场快速有效地脱水是非胶结充填中最难解决的问题.研究压风强化脱水机理,根据相似原理建立采场压风强化脱水实验模型.通过实验探索压风强化脱水工艺参数,并得出压风强化脱水管参数,为矿山全尾砂非胶结充填压风强化脱水工艺提供理论指导.利用流体力学数值模拟软件FLUENT建立压风强化脱水数值分析模型,通过压风强化脱水数值模拟分析,揭示全尾砂非胶结充填压风强化脱水过程中气、水运移规律及强化脱水效果的影响因素,进一步验证全尾砂非胶结充填压风强化脱水的可行性.