露天煤矿拉斗铲作业效率研究

Operation Efficiency of Dragline in Surface Coal Mine

为了探讨露天煤矿拉斗铲的作业效率,采用黑岱沟露天矿拉斗铲现场作业的统计数据,研究了拉斗铲的作业周期及分布规律和拉斗铲作业的满斗系数.得出了拉斗铲作业周期的计算公式,作业周期服从正态分布规律,分析了影响作业周期及满斗率的主要因素.结果表明:回转时间是影响拉斗铲作业周期的最主要因素;根据拉斗铲作业周期服从的分布规律可以得出拉斗铲的倒堆能力,为露天矿生产计划的制定提供依据;通过提高拉斗铲司机技术水平及加强露天矿各种工艺间的配合和现场管理,可以进一步提高拉斗铲的满斗系数;减小拉斗铲作业回转角和加大拉斗铲斗容的满斗系数是提高拉斗铲作业效率的有效途径,为国内外拉斗铲的研究提供了具体的分析方法和理论依据.

Using the spot operation data of dragline in Heidaigou Surface Mine, we studied the operational period, distribution rule, and the bucket fill factor of dragline operation so as to further discuss the operation efficiency. In addition, we analyzed factors affecting the operation period and the bucket fill factor, getting the calculation formula for the operation period. The result shows that the rotation time is the major factor affecting the operation period. Based on the situation that the operation period follows the normal distribution, we can obtain the overcastting capacity of the dragline so as to provide the basis for making production plans. Further more, by improving the technological level of the driver and strengthening spot management, the bucket fill factor can be further enhanced. Finally, decreasing the revolution angle and increasing the bucket fill factor are effective ways to improve the operation efficiency of dragline.