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目前中南地区的鎢錫脉狀矿床,广泛采用着淺孔留矿法进行开采,由于这些矿床的特征是一般的賦存条件多变,埋藏要素不够稳定,很大程度上限制了一些对地质条件和工人操作技术要求严格的采矿方案的使用;留矿法有着操作工序簡單、效率高、回采速度快、准备工作量少、材料消耗低等多方面的优点。因此,为要适应矿脉多变的客观条件及滿足生产躍进日益增長的矿石需要,除一部分矿床外,选擇留矿法作为主要的采矿方法,并进一步研究,革新工艺过程,使之日臻完善,以扩大其适应范圍,获取更优越的經济效果,我們認为是現实合理的途徑,为当前急需努力的正确方向之一。 鑒于我区正在进行开采的脉狀矿床中,圍岩不够稳固的佔着很大部分比重,留矿法运用于这一类矿塊,回采場的圍岩常隨采場暴露面扩展即产生不同程度的片(石邦)
At present, tungsten and tin vein deposits in Central-South China are widely exploited by shallow-hole ore-retention method. Due to the fact that these deposits are characterized by a variety of general conditions of occurrence and a lack of stability of burial elements, they largely limit some geological conditions And the operation of workers with strict technical requirements of the use of mining programs; mining method has the advantages of simple operation process, high efficiency, recovery speed, less preparation, low material consumption and many other advantages. Therefore, in order to adapt to the changing objective conditions of ore veins and to meet the needs of the growing production of leaping ore, the mineral retention method should be selected as the main mining method except for a part of the deposits, and further research should be carried out to reform the process so as to improve it In order to expand its adaptability and obtain more superior economic results, which we think is a realistic and reasonable approach and one of the correct directions urgently needed. In view of the vein-type deposits undergoing mining in our area, the surrounding rock is not stable enough and occupies a large part of its weight. The ore-retaining method is applied to this type of ore block. The surrounding rock of the mining area often varies with the exposed area of the stope The degree of film (stone state)