群空区下厚矿体二步骤采场回采顺序优化研究

Optimization Research on Mining Sequence of the Second-step Stope in Thick Orebody Under Groups of Goaf

针对某大型岩金矿山缓倾斜至倾斜厚矿体空场回采嗣后崩落二步骤采场高应力、高位移、高塑变的"三高"复杂开采技术难题,综合运用工程技术和经济学原理定量分析优化确定了隔一采一空场回采嗣后放顶的回采及空区处理方案,生产实践证明,该方案能确保矿山资源得到高效经济安全回采,满足矿山改扩建2500t/d的生产能力需求。

The open stoping with subsequent caving composite method was used to exploit the thick orebody with the dip angle from gently incline to incline in a large gold mine, which leaded high stress, high displacement and high plastic deformation in the second-step stope. According to the complex mining problems, the interval mining with subsequent caving was analyzed quantitatively and determined through engineering technology and economic principles. The production practice showed that the scheme could ensure the effective economic and safe mining of mineral resources, as well as meet the production capacity of 2500 t/d during mine reconstruction.