急倾斜厚大矿体阶段深孔空场崩落联合采矿法

以红岭矿区铅锌等多金属矿体为研究对象，针对原铅锌矿开采中存在的生产能力小、劳动效率低、分段采准工程量大、成本高、采场顶板暴露面积大、安全性差、维护费用高等问题，试验研究采用脉内脉外联合采准、阶段凿岩、平行深孔孔间微差精准起爆崩矿、铲运机阶段集中出矿、一次爆破回收矿柱、封闭隔离采空区综合工艺。经现场工业试验，矿房生产能力可达到970 t/d，采矿损失率3.19%，贫化率5.25%，采矿直接成本29.22元/t。试验证明该采矿工艺简单实用、劳动效率高、生产能力大、采矿成本低，而且能有效避免矿柱大量损失，是急倾斜厚大矿体安全高效开采技术的重大进步。

Stage Deep Hole Open-stope and Caving Combined Mining Method for Steeply Inclined Thick Ore-body

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.