酒钢西沟矿分期开采方案设计研究

西沟矿技术改造项目设计时将东山头圈入采场开采境界内，经过生产实践证明，采用全境界开采技术时，东山头边缘作业会严重威胁到3 100 m工业场地的安全生产。因此，提出了采用分期开采技术解决东山头开采过程的安全生产问题。在进行分期开采设计时，用临时非工作帮将最终境界划分为2个分期临时境界，东山头被划分在二期开采境界内。按照露天矿设计规范，确定了分期开采的服务年限、临时边帮构成要素和各台阶的推进顺序。通过编制中长期采剥计划，从理论上验证了分期开采方案的可行性。从近2 a的一期开采计划执行结果来看，该方案不仅能保证技术改造后的年产能不降低及开采终了境界不改变，又能从根本上解决东山头安全隐患，而且还产生可观的经济效益。

Discussion on the Design of Phased Mining in JISCO Xigou Mine

In the design of the technical renovation project of the Xigou Mine，the eastern hilltop is enclosed into the mining boundary.But after the production practice，it is proved that the mining of the eastern hilltop seriously threatened to the safe production of the 3 100 meter industrial site by adopting the complete boundary mining technology.Therefore，the proposal for solving the issue of production safety of the eastern hilltop mining by the phased mining is put forward.In the design of stage mining，the final boundary is divided into two stages by temporary non-working slope.The eastern hilltop is divided into the second phase of mining.According to the design standard for open-pit mine，the length of service of the phased mining，the temporary slope formation elements and the advancing sequence of each step are determined.Through the preparation of medium-term and long-term mining plan，the feasibility of the phased exploitation scheme is verified theoretically.From the first phase mining plan execution in the past two years，the designed scheme can guarantee that the annual production capacity is not reduced after the technological transformation with the final mining boundary not changed，and also can avoid the hidden danger of the eastern hilltop with considerable economic benefits obtained.