关键词: 急倾斜厚大矿体, 采矿方法, 阶段深孔, 空场崩落联合采矿法

Abstract: With Hongling mining area with Pb-Zn polymetallic ore-body as the research object，experimental researches are carried out aiming at problems in exploration of lead and zinc ores including small production capacity，low labor efficiency，large quantities of stripping and cutting，high cost，large exposed area of stope roof，poor safety and higher costs at maintenance.Through the complex processes of joint mining within ore vein or not，stage drilling，deep hole parallel millisecond precision blasting and caving，stage concentrated ore-drawing by scrapers，pillar recovery by once blasting and isolation of goaf，good index of production capacity of 970 t/d，loss rate of 3.l9%，dilution rate of 5.25% and direct mining cost at 29.22 yuan/t in the industrial field tests were obtained.Experiments proved that this mining process has characteristics of simple and practical operation，high labor efficiency，large production capacity，and low mining cost.It also can avoid the huge loss of pillars，and is a great progress in the safe and highly efficient mining technology for steeply inclined thick ore-body.

Key words: Steeply inclined thick ore-body, Mining method, Stage deep hole, Open-stope and caving combined stope