高推进强度下黑岱沟露天矿合理产能研究

Study on reasonable production capacity as high advance speed in Heidaigou Open-pit Mine

近年来,随着露天采矿工艺设备的发展和采矿技术的进步,生产规模的大型化成为全球露天煤矿的主要发展方向,而生产规模的扩大带来了矿山生产设计与现场生产组织管理的复杂化,因此合理的生产规模对于露天矿生产非常重要。针对目前黑岱沟露天矿高产能高推进强度下进入二采区后,由于地质条件变化在该矿的北部采用松动爆破-单斗卡车作业,而在该矿南部采用抛掷爆破-拉斗铲倒堆作业,这种南北分区开采方案后合理生产能力的确定问题,提出一种通过时空推演模拟来确定露天矿合理产能的方法。通过分析影响开采程序的现场因素,设定相应的约束条件,建立生产过程各工序之间的约束方程以及目标函数,利用时空推演的方法,对露天矿各生产环节进行了290、300、310、320 m/a不同生产强度下各工序接续环节的时空推演,找出生产过程中的瓶颈环节并对其进行不断的优化升级,保证不同工艺各工序之间的正常高效接续。研究结果表明:黑岱沟露天矿进入二采区以后,在现有设备能力条件下,通过对各工序的推演模拟,得出分区开采的采场最佳推进强度为310 m/a;依据相应的矿山设备组合能力和费用效率,确定分区开采的合理生产规模为3200万t/a。结果可为该矿原煤生产的顺利接续和矿山产能的稳定发展提供技术依据与理论支撑。

In recent years,with the development of open-pit mining process equipment and the advancement of mining technology,the large-scale production scale has become the main development direction of global open-pit coal mines,and the expansion of production scale has complicated the design of mine production and the management of on-site production organization.Therefore,a reasonable production scale is very important for open pit production.In view of the current high-capacity and high-pushing strength of the Heidaigou Open-pit Mine,the north-south sub-zoning mining plan of the southern throwing blasting-drawing shovel dumping operation is reasonable after entering the second mining area due to changes in geological conditions.To determine the production capacity,a method for determining the reasonable production capacity of open pit mines by time-space deduction simulation is proposed.By analyzing the onsite factors affecting the mining process,setting the corresponding constraints,establelishing the constraint equation and the objective function between the various processes in the production process,using the space-time derivation method,the production links in the open pit mine are time-space deduction of 290,300,310,320 m/a for the connection steps of different processes under different advance speeds.The bottlenecks is found in the mining process and continuously optimized and upgraded to ensure the normal and efficient connection between different processes.The authors find out the bottlenecks in the mining process and continuously and optimized and upgraded them to ensure the normal and efficient connection between different processes.The research ruslts show that after the Heidaigou Open-pit Mine enters the second mining area,under the conditions of existing equipment and equipment,through the simulation of each process,the best propulsion strength of the mining area is 310 m/a;The combination of mining equipment capacity and cost efficiency,to determine the reasonable production scale of district mining is 32 Mt/a.This study provides technical basis and theoretical support for the smooth connection of the production of raw coal and the stable development of mine production capacity.