黑岱沟露天煤矿综合开采工艺优化

Optimization of coal production capacity in Heidaigou Open-pit Coal Mine with combined mining system

为了充分发挥黑岱沟露天煤矿抛掷爆破—拉斗铲倒堆工艺优势,实现持续、稳定、高效开采。以工艺系统推进度一致为原则,建立了综合开采工艺生产能力与原煤产能关系模型。在此基础上,通过深入分析抛掷爆破台阶高度、拉斗铲扩展平台高度与原煤产能间的制约关系,建立了拉斗铲倒堆系统生产能力、抛掷爆破台阶高度、拉斗铲扩展平台高度与原煤产能关系模型,并以此保障抛掷爆破有效抛掷率、充分发挥抛掷爆破—拉斗铲倒堆工艺系统生产能力。结果表明:在抛掷爆破台阶高度45 m条件下,拉斗铲扩展平台高度13~16 m时,黑岱沟露天煤矿拉斗铲倒堆作业区可实现原煤产能2462万~2799万t/a,若南部500 m单斗—卡车作业区正常推进,全矿可实现原煤产能3400万t/a。

It is the key for Heidaigou open-pit coal mine to realize sustainable,stable,economical and efficient mining to give full play to the advantages of overcasting blast-dragline overcasting mining technology in the combined mining system.With the principle of consistent advancing speed of combined mining system,the model between the production capacity of combined mining process and raw coal production capacity of the mine is established.Based on that,with the goal to ensure the effective throw rate of overcasting blast and give full play to the production capacity of overcasting blast-dragline overcasting mining technology,through in-depth analysis of the restrictive relationship between overcasting blast bench height,height of expansion plaform for dragline excavating and raw coal production capacity,then the relational model between the production capacity of the dragline overcasting system,the height of the overcasting blast bench,the height of the dragline expansion plaform and the raw coal production capacity was established.It was determined that when the height of the overcasting blast bench is 45 m,and the height of the dragline expansion plaform is 13~16 m,the raw coal production capacity of the dragline overcasting operation area in the north of the mine is 24.62~27.99 million a,if the single bucket-truck operation area in the south of 500 m develops normally,the entire open-pit mine can achieve a raw coal production capacity of 34 million tons/a.