1.引言枥洞铅锌矿位于岐阜县北部吉城郡神冈町。矿床为块状接触交代矿床,所要开采的矿体大大小小共有65个。主要采矿方法为机械化分层充填法,目前正在广泛采用无轨采矿方式。年产原矿量为110万t,矿石品位为银18g/t,铅0.30％,锌4.2％。由于1986年以后日元升值使矿山面临严峻的经营环境,因此,采取了以下各种措施,实施了“为生存而奋斗”的计划,以努力提高生产率: (1)设备的大型化——采用大型铲运机, 1. Introduction Stable lead-zinc mine is located in Kamioka-cho, Joshin-gun, northern Gifu prefecture. The deposit is a massive contact with the deposit, a total of 65 large and small ore bodies to be mined. The main mining method is the mechanized stratification filling method, and the trackless mining method is widely used. With an annual output of 1.1 million tons of ore, ore grade silver 18g / t, lead 0.30%, zinc 4.2%. Since the appreciation of the yen after 1986 has posed a severe operating environment for the mines, various measures have been taken to implement the plan of “striving for survival” in an effort to increase productivity: (1) Large-scale equipment adoption Large scraper,