关键词: 急倾斜极薄矿脉, 小分段分采空场法, 经济指标

Abstract: The shallow hole shrinkage method has the advantages of the structure of mining area,recovery process and equipment configuration are relatively simple,the ore can be conducted gravity haulage,the ore tonnage and grade can be adjusted easily,the cost is low,therefore,it is widely used to deal with the steeply inclined thin veins.However,disadvantages of the shallow hole shrinkage method such as low efficiency of mining,high dilution rate,poor operation safety conditions should be improved in time.The shallow hole shrinkage method is adopted to deal with the inclined thin veins in a lead and zinc silver mine,according to this practice engineering situation,research on the application of the small sublevel open stope method is done.The production capacity is ensured and loss rate of ore dilution is reduced by mining in many sublevels that are divided in line along the vein angle. Effect of the application results is good and provide some reference for the relative engineering practice.

Key words: Steeply inclined thin veins, Small sublevel open stope method, Economic index