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我旷在采用留矿法中,对改进采矿結构要素,回采工艺过程,以及根据围岩矿脉的特征运用不同的留矿法变型方案等方面,做了很多的研究,取得了一定的成續,但是也存在一些問題。 (1) 使矿块昼夜生产率大大降低,为了保証生产任务的完成,需要开辟更多的采场,在一定程度上造成了采准赶不上回采的矛盾。 (2) 回采时間拖长,积压大量的存窿矿石,延迟了放矿的时間,降低了資金周轉率。 (3) 特別是在围岩不太稳固的条件下,回采时間拖长,使围岩片帮的可能性大大增加,不仅影响放矿困难,增大二次貧化,严重的有放不出矿的危险,如422,424,423等采场。 (4) 作业不集中,管理不方便,設备利用率低。为了克服上述存在問題,进一步改进现用留矿
I use a lot of mining methods, to improve the mining structure elements, the recovery process, and according to the characteristics of the surrounding rock veins using different retention method variation programs, made a lot of research and achieved some success, But there are also some problems. (1) greatly reduce the day and night productivity of ore blocks, in order to ensure the completion of production tasks, need to open up more stope, to a certain extent, caused the mining mining contradiction can not catch up. (2) The long recovery time, backlog of a large number of deposit ore, delayed the time of the ore, reducing the capital turnover rate. (3) Especially in the condition that the surrounding rock is not stable, the prolonged mining time prolongs the possibility of supporting the rock mass, which will not only affect the difficulty of ore drawing, but also increase the secondary depletion, Mine danger, such as 422,424,423 stope. (4) homework is not concentrated, inconvenient management, equipment utilization is low. In order to overcome the existing problems, further improvement of existing mineral retention