露天矿破碎站部分下坑时布置水平优化

随着露天煤矿生产规模的不断加大，半连续工艺在露天矿的应用也越加广泛。实践证明，半连续工艺的应用对煤矿经济效益有很大的提升，而在半连续工艺中，破碎站的位置对煤矿生产效益起到决定性作用。借助于限制坡度的定义和坑内破碎站的生产能力要求，对坑内煤层进行分区；在此基础上，给出了运煤卡车到坑内破碎站和地表破碎站的运距、内排增加运距和坑内提升胶带长度的计算方法；在对半连续系统进行整体考虑后，以总运输费用最小为原则，建立破碎站布置水平优化模型，给出了卡车运费、增加的内排运费和提升胶带系统总费用的计算方法，并将建立的优化模型应用到实例研究中。计算结果表明，宝日希勒露天煤矿将破碎站布置在+625 m水平上时总运输费用最小，此为破碎站布置的最优水平。另外，通过分析可知，坑内破碎站的位置不宜过低，避免对内排产生较大的影响。

Location Optimization of Crushing Station under Pit in Surface Mine

With the increasing of production scale，semi-continuous system is widely used in surface coal mine.The practice proved that application of the semi-continuous system has greatly improved economic efficiency in opencast mines.Among this，location of crushing station plays a decisive role in improving production efficiency.With the aid of the definition of limiting slope and capacity requirements of crushing station in pit，the coal seam partition was made.On this basis，the calculation method for the transport distance of coal truck to underground crushing station and surface crushing station，increased transport distance of internal dumping and the elevating belt length in pit was present.After considering the semi-continuous system as a whole，and by the principle of totally minimum transport cost，the optimization model of crushing station layout was established to propose calculation methods for total transport freight of the truck，the increasingly internal dumping and the hoist system.Meanwhile，the model was applied into the practical engineering.The calculation results showed that the total transport cost is minimum when crushing station is arranged on +625 m level in Baorixile Open Pit Mine，and this is the optimal position for crushing station.In addition，the analysis indicated that location of crushing station in pit can not be too low to avoid from a worse impact on internal dumping.