一、留矿采矿法使用情况留矿采矿法在我国金属矿山应用很早且广泛,应用时间也较长。无论是矿山数还是从矿石采出量来看,留矿法均占较大比例。但是从七十年代开始,使用留矿法生产的矿石量是逐渐减少的。1961年留矿法在我国有色金属地下矿山采出的矿石量中所占比例为49％,1981年降到39％,1983年又降到24％,而1985年进一步降到 First, the use of mineral retention mining law Retaining mining method in China’s metal mines and early application of a wide range of application time is longer. Regardless of the number of mines or ore from the amount of mining point of view, leaving a large proportion of mining law. However, from the seventies onwards, the amount of ore produced using the mineral retention method has been gradually reduced. In 1961, the mineral retention method accounted for 49% of the ore amount recovered from the non-ferrous metals underground mines in China, down from 39% in 1981 to 24% in 1983 and dropped further in 1985