露天煤场不同粒径煤尘扬尘实验研究Experimental study on dust raised from different sizes in open coal yard
马明星;荆德吉;陈曦;葛少成;李雪聪;
摘要(Abstract)：
为研究露天煤场不同粒径沉积煤尘的扬尘规律,根据风洞实验和相似模拟实验基本原则搭建煤尘起尘实验装置,对露天煤场不同条件下不同粒径组成的沉积煤尘的扬尘现象和规律进行研究.采用最小二乘法和高斯牛顿法对实验数据进行回归分析.实验结果表明:沉积煤尘的起尘量随粒径的增大呈现起尘量先增大后减小的规律,当煤尘粒径接近0.23 mm,煤尘的起尘量最大,实验30 min最大值为16.4 kg;煤尘粒径小于0.115 mm,煤尘的起尘量极小试验最小值为0.003 kg.回归分析得出平均粒径在0～0.23 mm范围内的不同含水质量分数的圆锥形煤尘静置在不同风速条件下煤尘起尘量的数学关系式.保证粉尘的含水质量分数在6%以上,煤尘所处的环境风速小于4 m/s可以有效地降低煤尘的二次扬尘.
关键词(KeyWords)： 煤尘;风洞实验;相似实验;起尘量;回归分析
基金项目(Foundation): 国家自然科学基金青年资金（51704145;51704146）
作者(Authors): 马明星;荆德吉;陈曦;葛少成;李雪聪;
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