摘要
陕西凤县八卦庙金矿床，由建矿初期日处理选矿量100t到2003年日处理2600t，年处理选矿量90～100万t，随着选厂处理矿石量的加大，矿山地下开拓采矿系统集中在矿体富集区长400m宽200m范围内，形成多中段同时开采。在处理1390m中段采空区中上中段形成两条断裂分别为70°、45°，随后沿70°断裂缝地表凹陷，并波及到其它采空区，形成大面积地压险陷，大量废石涌入。原矿地质品位逐年减少，矿山抗风险能力降弱。南坡治理及深部开拓迫在眉睫。采空区处理方案将是今后矿山发展的重要措施之一。建议深部开拓采矿系统采用空场采矿法对采空区以废石、尾砂、水泥进行固结空区充填处理。
The Baguamiao gold deposit in Fengxian County of Shaanxi Province increased the capacity of daily mineral processing from 100 tons per day at the beginning to 2, 600 tons per day in 2003. With the increase of the capacity of mineral processing, the major mining activities are mainly concentrated in some enrichment areas that are bounded within a range of 400 meters wide and 200 meters long, and mining activities are conducted in different elevations at same time. At the mining elevation of 1390m, two faults are found at 70° and 45° at the middle to upper sections and along the fault of 70°, subsidence occurred on the surface, which impacts other adjacent stoped out areas resulting in risk subsidence at a large area and intrusion of a lot of mutlock to the stoped out areas. In order to bring the south slope under control and further mining downward, the treatment plan of mined out areas would be important for further development of the gold mine in future. The open-stope method is recommended to be used in the mining system at the depth for filling treatment of the mined out areas with mullock, tailings and cement.
出处
《陕西地质》
2009年第1期95-100,共6页
Geology of Shaanxi
关键词
八卦庙
金矿床
深部开采方案
空场采矿法废石尾砂
空区充填
Baguamiao gold deposit
mining plan at depth
treatment of mullock and tailings in open-stope method
filling mined out areas
