双鸭山铁矿诱导冒落法试验研究  

Experimental Study of the Induced Caving Method in the Shuangyashan Iron Mine

作　　者：马姣阳 任凤玉[1] 何荣兴[1] 闫喜明 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]双鸭山建龙矿业有限公司,黑龙江双鸭山155126

出　　处：《东北大学学报（自然科学版）》2016年第1期69-73,共5页Journal of Northeastern University(Natural Science)

基　　金："十二五"国家科技支撑计划项目(2013BAB02B08);国家自然科学基金重点资助项目(50934006);中央高校基本科研业务费青年教师科研启动基金资助项目(N130301002)

摘　　要：针对双鸭山铁矿北区急倾斜破碎中厚矿体实际生产中存在的采准、切割工程难以形成,采场安全条件极差,损失、贫化大等问题,提出了切割巷+斜排炮孔拉槽、两端退采的诱导冒落法开采方案.给出了适合该类矿体的诱导工程参数,分析研究了其冒落进程、冒落块度,并预算了崩矿损失率、贫化率,依此在双鸭山铁矿S5采场进行试验.跟班标定表明,回采初期,回收率较高,冒落块度良好,与分析情况基本吻合;诱导区顶板冒透后,混岩率呈交替上升趋势变化,其现象与爆破块度及凿岩巷道位置有关.该法回收指标较好,可有效解决急倾斜破碎中厚矿体开采难题.The cutting roadway, the broached groove of oblique blasthole and both ends retreat mining of the induced caving method was proposed due to difficult stope preparation and cutting engineering, poor stope safety conditions and high loss and dilution of the steeply inclined and fractured medium thick orebody in Shuangyashan iron mine. The suitable parameters to induce orebody caving were given. The caving process and the lumpiness of caving block were analyzed and the loss rate and dilution rate of caving ore were estimated based on the No. $5 stope in Shuangyashan iron mine. According to results of the regular shift recordings, the recovery rate was higher and the degree of the caving block was good in early recovery period, which was consistent with previous analyses. The rock mixing rate increased along with cycle changes after complete caving, and the phenomenon was associated with the position of the drilling of roadway and the lumpiness of blasting blocks. The recovery indexes of this method are good and the mining problems of the steeply inclined and fractured medium thick orebody can be effectively solved.

关 键 词：急倾斜破碎中厚矿体 诱导冒落法 损失率 贫化率 块度 

分 类 号：TD853.3[矿业工程—金属矿开采]