杏山铁矿露天转地下覆盖层回填自然分级研究

Study On Natural Grading Of Covering Layer Backfilled Open Pit To Underground Of Xingshan Iron Mine

露天转地下覆盖层的自然分级现象,对使用崩落法开采矿山的通风、温度、矿石损失贫化等指标都有较明显的影响,但对于覆盖层在回填时就形成合理自然分级,国内研究尚处于空白阶段。以首钢杏山铁矿为研究背景,采用理论分析、物理模拟试验、现场排土场试验等研究手段,对露天转地下覆盖层回填自然分级规律进行了深入系统的分析,研究结果得出杏山铁矿采用倒排排土场废石,人工回填形成合理结构和厚度的自然分级覆盖层是可行的。

The cover of the open pit to underground natural phenomena on the use classification of the mine caving mining ventilation, temperature, dilution and other indicators of ore loss have a more significant impact, but when the coating in the filling to form a reasonable natural grading, domestic research is still in the blank stage. The background for the study of Shougang Xingshan iron mine, using theoretical analysis, physical simulation, field trials and other research tools, the cov- erage of the open pit to underground layer of backfill laws of the natural classification system for in-depth analysis of the re- suits come Xingshan iron mine waste rock dump using artificial backfill to form a reasonable hierarchical structure and thickness of the natural cover is feasible.