论文部分内容阅读
金川镍矿井下开采的20年生产实践表明,不宜采用崩落采矿法和干式充填采矿法,而采用胶结充填采矿法则收到了较好的效果。在胶结充填采矿法中又以上向水平分层胶结充填法和下向倾斜分层胶结充填法效果最佳。上向水平分层胶结法劳动生产率高、结构安全、矿石的贫化率及损失率较低,但要求矿岩稳固;与上向水平分层胶结充填法相比,下向倾斜分层胶结充填法虽然劳动生产率稍低、矿石贫化率及损失率大和木材消耗量高,但适应条件好,可在矿岩破碎及产状较复杂的矿体中采用。 本文还介绍了金川镍矿的机械化充填系统。一矿区的充填系统是由地表水泥搅拌站、砂石仓和井下混凝土搅拌站、电耙耙运系统组成。二矿区由于采场深度在500米以下,水平距离为200～1300米,不适于电耙输送,而采用高浓度(78～80％)细砂料浆管道新工艺,比较好地解决了问题。 文章对金川镍矿今后的发展还提出了改进意见。
The 20-year production practice of underground mining in Jinchuan nickel mine shows that the caving method and dry-filling method should not be adopted, while the cement-filled mining method has received good results. In the cementing and filling method, the above-mentioned method of horizontal-layered cementation filling and downward-inclined layered cementation filling have the best effect. The horizontal stratified cementing method has the advantages of high labor productivity, structural safety, low ore dilution rate and loss rate, but requires stable ore rock. Compared with the horizontal stratified cemented filling method, the downward inclined layered cemented filling method Although the labor productivity is slightly lower, the rate of ore dilution and loss is high, and the consumption of wood is high, the adaptability is good and can be used in the ore bodies that have been crushed and complicated in occurrence. This article also introduces the Jinchuan nickel mechanized filling system. A mining area filling system is composed of surface cement mixing station, sand silos and underground concrete mixing station, rake rake system. Due to the mining area depth of 500 meters and the horizontal distance of 200 to 1300 meters, the No.2 mining area is not suitable for electric rake transportation, but the new technology of high concentration (78-80%) fine sand slurry pipeline is adopted to solve the problem well. Article on the future development of Jinchuan Nickel also put forward suggestions for improvement.