弓长岭井下矿大断面结构参数应用研究

Research on Big Cross Section Structure Parametres in Underground Mine of Gongchangling

从弓长岭井下铁矿的实际应用出发,提出了“无底柱分段崩落法沿脉进路大断面出矿”研究方案(即巷道高度不变,增加出矿进路的断面宽度),以增加矿石流动带,减少大块堵塞,实现全断面出矿,提高矿石回收率,降低混岩率。通过实验室物理模拟实验,详细分析了大断面进路出矿的各种方案,总结了大断面进路出矿的优点及改进方向。把大断面出矿进路应用于鞍钢弓长岭井下矿,矿石回收率比以前采用小断面进路出矿时有明显提高,证实了大断面出矿进路在放矿方面的有效性及优越性。

According to actual application of Gongchangling, the paper bring forward of big cross section research project (namely tunnel high constant, increase the tunnel's cross width), Then we can increase ore fluxion strap, reduce chunk jam and practice mating mine on the spot in order to enhance recovery rate and decrease rock - mixing rate. By laboratory physics simulation experiment, we analyze diversified projects of big cross section setting- ore, summarize virtue and improvement direction of big cross section setting - ore. This paper applied the big cross setting - ore tunnel in underwell mine of Angang Gongchangling, the ore recovery ratio was obviously higher than before, we confirm the validity and su-periotity of big cross section laneway in setting - ore.