雅满苏铁矿露天采场不扩境延深开采技术研究

针对牙雅满苏铁矿目前的开采现状，在原设计露天底的基础上，保证露天采场上部边坡不扩帮的前提下，从边坡稳定性，采排工艺，设备作业空间条件及经济效益等方面进行了分析研究，研究研究表明，采场不扩境延长了服务期4年，并按年度计划组织均衡生产，可实现露天开采平稳地转入地下采。

Study on the Deepening Opencasting Without Boundary Expansion at Yamansu Iron Mine

In view of the present mining conditions of Yamansu Iron Mine, on the basis of the originally designed pit bottom and under the prerequisites of ensuring no expansion of upper pit slope,analytical study was made on the slope stability,mining and earth removing technologies,spacial conditions for equipment operation and economical benefit.The results have shown that a prolonged service period of 4 years by the deepening opencasting without boundary expansion and equilibrium production organized in accordance with annual planning can help to realize a stable transfer from opencasting to underground mining.