基于Flunt模拟的龙首矿下向进路采矿炮烟扩散规律研究  

Fluent-based Simulation of Gun Smoke Diffusion from Single-head Approach in Longshou Mine

作　　者：陶发玉 陶云波 黄春云 TAO Fayu;TAO Yunbo;HUANG Chunyun(Longshou Mine,Jinchuan Group Co.,Ltd.,Jinchang 737100,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,China)

机构地区：[1]金川集团股份有限公司龙首矿,甘肃金昌737100 [2]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《金属矿山》2022年第8期232-238,共7页Metal Mine

摘　　要：为提高矿山回采效率,研究不同联络道高度、不同独头进路长度、不同通风井直径及不同通风井布置位置对独头进路中CO自然扩散的影响规律。根据矿山独头进路特点和联络道建立模型,并整体划分网格,利用Fluent流体分析软件对不同模型进行数值模拟。结果表明:①5 m分层道高度相较于3.5 m分层道,更有利于独头进路中CO的扩散,主要因为3.5 m分层联络道与独头进路的高度差1.5 m的岩壁阻碍炮烟的扩散;②CO扩散达标时间随独头进路和通风井之间距离的增加而增加;③50 m独头进路的炮烟扩散时间要远低于70 m独头进路,因为更长的独头进路具有更多的摩擦阻力,降低了CO扩散的效率;④更大的通风井直径,更有利于CO扩散,因为更大的通风井直径,降低了风流排出的阻力,增加了CO扩散的效率。In order to improve the mining efficiency,the influence of different connecting road heights,different lengths of single-ended access roads,different diameters of ventilation shafts and different ventilation shaft layout positions on the natural diffusion of CO in single-ended access roads was studied.The model is established according to the characteristics of the mine′s single-head access road and the connecting road,and the grid is divided as a whole,and the Fluent fluid analysis software is used to numerically simulate the different models.The results showed that:①Compared with the 3.5 m layered road,the height of the 5 m layered road is more conducive to the diffusion of CO in the single-end approach,mainly because the height difference between the 3.5 m layered road and the single-end road is 1.5 m.The rock wall hinders the spread of gun smoke.②The time to reach the CO diffusion standard increases with the increase of the distance between the single-ended approach and the ventilation shaft.③The gun smoke diffusion time of the 50 m single-head approach is much lower than that of the 70 m single-head approach,because the longer single-head approach has more frictional resistance,which reduces the efficiency of CO diffusion.④Larger ventilation shaft diameter is more conducive to CO diffusion.Because of the larger diameter of the ventilation shaft,the resistance of the wind flow is reduced and the efficiency of CO diffusion is increased.

关 键 词：下向六角形进路 胶结充填采矿法 炮烟扩散 Fluent数值模拟 

分 类 号：TD711[矿业工程—矿井通风与安全]