胶带输送巷道粉尘分布及其影响因素的实验研究  

Experimental research on dust distribution and its influencing factors in belt conveyer roadway

作　　者：陈举师[1] 蒋仲安[1] 姜兰[1] 

机构地区：[1]北京科技大学教育部金属矿山高效开采与安全重点实验室,北京100083

出　　处：《煤炭学报》2014年第1期135-140,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51274024)

摘　　要：根据相似原理,结合气固两相流的运动方程,导出了模拟胶带输送巷道粉尘运动的相似准则数,以西石门铁矿11/96胶带斜井为原型,建立了胶带输送巷道相似模型,并对粉尘分布进行了实验研究。研究结果表明:巷道模型内粉尘浓度沿程先逐步上升至一个最大值,后逐步缓慢降低。巷道风流方向、巷道平均风速、胶带运行速度、矿石含水率、放料速度及放料高度等是影响胶带输送巷道粉尘浓度分布的6个主要因素。巷道平均风速越大,带式输送机顺风运行且运行速度越小,粉尘浓度越低;矿石含水率越高,粉尘浓度越低,且矿石含水率达到3.09%后,粉尘浓度基本不再降低;放料速度越快,放料高度越高,粉尘浓度越大。Due to the similarity theory and the gas-solid two-phase flow equation motion, taking 11/96 belt conveyer inclined shaft in Xishimen Iron Ore as the research background, author educed the similarity index and designed a par- allel model device for the specific situation in the belt convey roadway. Meanwhile, the dust distribution was experi- mentally studied. The results indicat that dust concentration along the first rises gradually to a maximum value in the roadway model, then gradually slowed down. Airflow direction, the average velocity of wind, the operating speed of the belt, ore moisture, feeding rate and feeding height are main influencing factors of dust distribution in the belt conveyer roadway. When the belt run along the wind direction in a low speed, the higher the velocity of wind, the smaller dust concentration will be. In the same way, the higher ore moisture, the lower the dust concentration. In addition, when ore moisture reaches the value of 3.09% , the dust concentration no longer reduces;What is more, the faster the feeding rate and the higher the feeding height, the greater dust concentration will be.

关 键 词：胶带输送巷道 粉尘分布 影响因素 相似准则 气固两相流 

分 类 号：TD714[矿业工程—矿井通风与安全]