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近几年来中南各金属矿山,对于矿石贫化和损失方面作了不少工作,采取了一些措施,如:控制采幅;矿石进入选厂前进行手选;还有部分矿山进行了选别充填回采方法的试验。但此方法都没有获得很好的结果和推广,主要原因是该采矿法存在很多的缺点,如:(一)回采速度小、采矿强度低:在苏联许多矿山应用证明,回采工作的平均推进速度不超过1～1.5公尺/每月(注1)。
In recent years, various metal mines in Central and South China have done a lot of work on depletion and loss of ores. Some measures have been taken such as controlling the amplitude of the eddies, selecting ore before going to the mills, and selecting mines for some mines Test of the mining method. However, none of these methods have achieved good results and promotion. The main reason is that the mining method has many shortcomings, such as: (1) small recovery rate and low mining intensity: the application of many mines in the Soviet Union proves that the average speed of recovery work No more than 1 ~ 1.5 meters / month (Note 1).