哈尔乌素露天煤矿爆堆粉尘润湿性及其影响因素

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0032

摘要/Abstract

摘要：

为提高抑尘剂的降尘效果,探究露天矿爆堆粉尘润湿性及其影响因素。以哈尔乌素露天煤矿不同爆破台阶爆堆产生的煤尘及岩尘为研究对象,采用室内试验和数据统计分析等方法,分析露天矿爆破粉尘颗粒理化特征,并在此基础上讨论其理化特征与润湿性关系,采用SPSS软件进行回归分析,建立回归模型,最终由回归方程得知影响露天煤矿爆堆粉尘润湿性的主要因素。结果表明:影响煤尘润湿的显著因素是固定碳含量和粉尘粒径D₅₀;影响岩尘润湿的显著因素是D₅₀。

关键词: 露天煤矿, 爆堆粉尘, 粉尘润湿性, 影响因素, 粉尘治理

Abstract:

In order to enhance the dust suppression effectiveness of dust suppressants, the wettability of dust from blast piles in open-pit mines and their influencing factors were investigated. The coal dust and rock dust generated from different blasting stages at the Ha'erwusu open-pit coal mine were taken as research objects. Various methods, including indoor experiments and statistical data analysis, were employed to analyze the physicochemical characteristics of explosive dust particles from open-pit coal mines. Based on this analysis, the relationship between physicochemical characteristics and wettability was discussed. Regression analysis using SPSS software was conducted to establish a regression model. The final regression equation revealed the primary factors influencing the wettability of dust from blast piles in open-pit coal mines. The results indicate that the significant factors influencing the wettability of coal dust are fixed carbon content and D₅₀. The significant factor affecting the wettability of rock dust is D₅₀.

Key words: open-pit coal mine, dust from blast piles, wettability of dust, influencing factors, dust control

中图分类号:

X964工业防尘

李全生, 颜杰, 王斌, 张禹. 哈尔乌素露天煤矿爆堆粉尘润湿性及其影响因素[J]. 中国安全科学学报, 2023, 33(S2): 7-12.

LI Quansheng, YAN Jie, WANG Bin, ZHANG Yu. Wettability of dust from blast piles in Ha'erwusu open-pit coal mine and its influencing factors[J]. China Safety Science Journal, 2023, 33(S2): 7-12.

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倍数	1号煤尘/4号岩尘	2号煤尘/5号岩尘	3号煤尘/6号岩尘
25 000倍煤尘
25 000倍岩尘

煤质	煤尘	M_ad	A_ad	V_ad	FC_ad
褐煤	1号	5.95	18.27	32.60	43.18
	2号	5.45	17.12	30.70	46.73
	3号	5.18	16.86	27.74	50.22

成分	占比
	煤尘			岩尘
	1号	2号	3号	4号	5号	6号
SiO₂	14.8	—	—	67.3	55.2	51.1
Al₂(Si₂O₅)(OH)₄	65.8	78.9	80.5	32.5	44.1	48.1
AlO(OH)	8.1	12.3	12.1	—	—	—
Ca(CO₃)	11.3	8.8	7.4	—	—	—
Hg₂(H₂PO₄)₂	—	—	—	—	0.7	0.8
其他	—	—	—	0.2	—	—

粉尘理化特征	皮尔逊相关系数
粉尘理化特征	煤尘接触角/(°)	岩尘接触角/(°)
D₅₀/um	-0.937 08	-0.982 54
比表面积/(m²·g^-1)	-0.913 68	-0.963 36
M_ad/%	-0.948 9	—
A_ad/%	-0.914 73	—
V_ad/%	-0.985 71	—
FC_ad/%	0.989 6	—
高岭石/%	0.960 49	0.960 49
石英/%	-0.972 95	-0.972 95
方解石/%	-0.523 21	—
勃姆石/%	0.474 69	—

模型参数	T检验
模型参数	T值	显著性
常量	2.503	0.046
固定碳含量	11.321	<0.01
D₅₀	-2.503	0.046