金堆城钼矿小孔径减震爆破试验研究  

Small Diameter Damping Blasting in Jinduicheng Molybdenum Mine

作　　者：叶海旺[1] 何成斌[1] 王亮[1] 徐文文[1] 张迎吉[2] 王建军[2] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]金堆城钼业股份有限公司,陕西西安710077

出　　处：《金属矿山》2014年第1期43-45,共3页Metal Mine

摘　　要：为降低爆破震动对东川河隧洞的影响，在金堆城南露天矿1200m平台进行140mm小孔径爆破试验，并分别对震动数据和爆破块度分布进行分析研究。结果表明：与常规生产爆破相比，小孔径爆破振速明显减小，减震率达到60％-75％；小孔径爆破具有大块率低、平均块度小、破碎效果好等优点，并找出了小孔径爆破下的安全距离。用ANSYS建立台阶爆破的有限元模型，通过数值模拟进一步验证了小孔径爆破试验所得安全距离和减震率的可信度。In order to reduce the impact of mining blasting vibration on Dongchuan River tunnel, 140 mm small diam- eter blasting test was carried out on 1 200 m plate of southern Jinduicheng molybdenum surface mine. The detected blasting vibration data and rock fragmentation were analyzed in accordingly. The results showed that the blasting vibration velocity of small diameter blasting was significantly reduced compared with conventional production blasting of the mine, and the damp- ing rate arranged from 60% to 75%. The small diameter blasting has advantages of low bulk rate, small average fragmenta- tion and good rock fragmentation. At the same time, the safe distance of small diameter blasting was obtained. The finite ele- ment model of bench blasting was established with ANSYS, and the numerical simulation results confirmed the credibility of safety distance and damping rates from small diameter blasting experiments.

关 键 词：小孔径爆破 安全距离 减震率 破碎效果 数值模拟 

分 类 号：TD235.39[矿业工程—矿井建设]