无底柱分段崩落法放矿截止品位的研究趋势

Study Trend on Cut-off Grade for Ore Drawing in Subdrifting and Caving without Sill Pillar

为寻求无底柱分段崩落采矿法合理的放矿截止品位,众多研究者进行了大量的研究,提出了多种理论和方法。对有关文献进行综合分析后,将截止品位放矿的研究成果归纳为3大类,即单一截止品位放矿、组合截止品位放矿,无贫化或低贫化放矿。通过研究分析,认为单一截止品位放矿方法与其他两种方法相比,在理论上没有优势和发展潜力。

In order to seek reasonable cut-off grade for ore drawing in subdrifting and caving without sill pillar, the relative researchers have put forward various theories and methods. Based on the synthetic analysis of correlative documents, the three main kinds of genre on cut-off grade for ore drawing are summed up, which are the single cut-off grade, composite cut-off grade and dilutionless/low-dilution for ore drawing. Based on making a study of them, the single cut-off grade for ore drawing is regarded as less advantageous and less development potential than another two methods in theory.