摘要
为掌握采场爆破作业时粉尘质量浓度的分布及变化规律,获取通风除尘设计的合理参数,以李楼铁矿-200m水平44号采场为研究背景,依据气固两相流理论,运用Fluent软件对巷道型采场爆破粉尘质量浓度分布规律进行数值模拟,并与现场实测数据进行对比分析。研究结果表明:模拟结果与实测数据基本一致。在采场进路断面方向,粉尘质量浓度呈由左至右、由下至上降低的分布规律;在轴线方向,粉尘质量浓度呈中间高,两侧低的分布态势;当联络巷风速为2m/s时,采场空间内粉尘沉降及排出效果较好;此外,还可通过加强壁面洒水及安装压入式通风等措施改善粉尘的沉降及排出效果。
In order to master the regularities of dust concentration distribution and changing in stope blasting and obtain rational parameters for the design of dust removal by ventilation,taking No.44 stope of Lilou Iron Mine as the research background,based on the theory of gas-solid two-phase flow,the regularities of dust concentration distribution in roadway stope blasting were simulated using Fluent software.The simulation results were compared with field measured data.The results indicate that the simulation results are essentially coincident with the measured data.In cross section of stope drift,dust concentration will gradually decrease radially from left to right,and bottom to up.In the axis,dust concentration among are higher than that on both sides.When the velocity of wind is 2 m/s,the dust settlement and discharge effect is better in stope space.In addition,strengthening watering to the stope wall and installation pressure system of ventilation can improve the settlement and discharge effect.
出处
《中南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2013年第3期1190-1196,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51274024)
关键词
巷道型采场
爆破粉尘
气固两相流
浓度分布
数值模拟
roadway stope
blasting dust
gas-solid two-phase flow
concentration distribution
numerical simulation