多中段群空区下缓倾斜厚大矿体分区高效回采实践

某大型岩金矿山缓倾斜厚大矿体拟采用两步骤空场回采嗣后崩落采矿法，针对多中段群空区下一步骤采空区未处理环境下的二步骤采场回采，结合矿区改扩建生产能力需求，创新构建了大盘区采场分区高效回采方案。将二步骤采场划分成两个区域回采，两区域中间由隔离矿柱分开，下盘矿体采用分段空场侧向崩矿嗣后放顶方案，上盘三角矿体采用分段空场正向崩矿法方案。通过开展大盘区采场分区现场工业试验，实现了多中段群空区下缓倾斜厚大矿体的高效经济安全开采，为类似条件矿山开采提供了重要的技术支撑。

High-efficient Zoned Mining Practice of Slowly Inclined Large and Thick Orebody under the Condition of Multi-level and Goaf Groups

Some large rock gold mine is attempted to adopt the two steps open stoping with subsequent caving mining method for the slowly inclined large and thick ore-body.According to the condition of multi-level and goaf groups，and second-step stopes mining under the condition of first-step goaf without management，as well as combining with the reconstruction production capacity requirements，the large panel stope high-efficient zoned mining scheme is put forward.The second-step stope is divided into two mining areas to retain barrier pillars between the two areas.The ore bodies in the footwall adopt sublevel open stoping and lateral caving with subsequent roof caving method，and the triangular ore bodies in the hanging wall used sublevel open stoping with positive caving method.Through the large panel stope high-efficient zoned mining industrial field test，high-efficient，economical and safety mining of slowly inclined large and thick orebody under the condition of multi-level and goaf masses are realized，which provides important technical support for the mines with similar conditions.