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我矿在采用留矿法中,对改进采矿结构要素,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,取得了一定的成绩,但是也存在一些问题。(1)使矿块昼夜生产率大大降低,为了保证生产任务的完成,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)回采时间拖长,积压大量的存窿矿石,延迟了放矿的时间,降低了资金周转率。(3)特别是在围岩不太稳固的条件下,回采时间拖长,使围岩片帮的可能性大大增加,不仅影响放
I mine in the use of ore retention method, to improve the mining structure elements, mining 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 results, 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) The long recovery time, especially under the condition of unstable surrounding rock, greatly increases the possibility of surrounding rock fragments, which not only affects the release