关键词: 国外矿山, 恢复生产, 中厚矿体, 采矿方法, 技术经济, 分段凿岩阶段空场法

Abstract: The geological feature and current situation of Alden-topkan lead-zinc mine are introduced briefly. The orebodies' occurrence and thickness in the mining range are classified. And the results show that sharp inclined medium thick orebody is the mine's main type. According to the mine's main orebody，amd through the comprehensive technical and economic comparison，sublevel drilling and bench open stoping method is selected. Compared with the pillarless sublevel caving method used early，the sublevel drilling and bench open stoping mining method has a larger capacity of producing ore block，lower waste in-ore rate，and better operation conditions. The practice in the mine's design and its production recovery shows that this mining method is suitable for the mine to resume production.

Key words: Overseas mine, Production recovery, Medium-thick orebody, Mining methods, Technical economy, Sublevel drilling and bench open stoping