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在分析露天矿剥离物内排运距基础上,建立了开采工艺优选模型,为剥离半连续工艺应用范围优化提供支撑。研究根据近水平露天矿开采特点,给出了间断工艺和半连续工艺的剥离物内排运距计算方法。在综合考虑投资和运营成本影响的基础上,以计算期内总费用最小为目标建立了露天开采工艺优选模型,给出了投资、运营成本和附加费用的计算方法和应用剥离半连续工艺的边界条件。实例研究表明,随着开采深度增加和采场尺寸加大,上部剥离台阶应用半连续工艺是合理的,H矿剥离半连续工艺的最下服务范围为+140 m水平。燃料动力费的敏感性分析同时表明,国内柴油价格的快速上涨将促进剥离半连续工艺在我国大型露天煤矿的推广应用。
Based on the analysis of the internal discharge of open-pit mine stripping materials, the optimization model of the mining process was established, which provided the support for optimizing the application scope of the stripping semi-continuous process. Based on the characteristics of mining in near-horizontal open-pit mines, the calculation method of the internal discharge distance of the strip in the discontinuous and semi-continuous processes is given. Based on the comprehensive consideration of the impact of investment and operating costs, the optimization model of open-pit mining process is set up with the goal of minimizing the total cost during the calculation period. The calculation methods for investment, operating costs and additional costs are given, and the boundary of the semi- condition. The case study shows that with the increase of mining depth and the increase of stope size, it is reasonable to apply semi-continuous process to the upper peel step, and the lowest service range of semi-continuous process to peel H +140 m. Sensitivity analysis of fuel power costs also shows that the rapid rise of domestic diesel prices will promote the stripping of semi-continuous process in China’s large opencast coal mine promotion and application.