Shigetai Coal Mine,CHN Energy Shendong Coal Group Co. ,Ltd.
School of Safety Engineering,China University of Mining and Technology

为了解决作业场所粉尘中游离二氧化硅含量的标准检测方法操作复杂、周期长、检测结果易受矿物干扰的问题,探讨了将拉曼光谱应用于煤尘中游离二氧化硅含量测定的可行性。采集了含不同质量二氧化硅的煤尘干燥斑点试样的拉曼光谱,并根据二氧化硅特征峰数据与其质量载荷之间的函数关系,建立一元线性回归(ULR)和偏最小二乘回归(PLSR)模型。其中,PLSR模型拟合显著,检测限可达8.29ng。对比了PLSR模型和标准红外光谱法对煤尘试样中的二氧化硅含量检测值,3次平行实验的相对标准偏差值为8.53%~27.33%,且拉曼光谱与红外光谱的检测值较为一致。拉曼光谱在保证结果可靠性的同时降低了检测限,检测流程简便。

To address the challenges associated with complex operations,extended detection periods,and mineral interference in the existing standard method for determining free silica content in workplace dust,the applicability of Raman spectroscopy for analyzing free silica content in coal dust was explored in this study. Raman spectroscopy from dry spot samples of coal dust containing varying masses of silica were collected. Subsequently,unary linear regression(ULR) and partial least squares regression (PLSR) models were established based on the relationship between characteristic silica peak data and silica mass load. The PLSR model demonstrated a remarkable fit,achieving a detection limit as low as 8. 29 ng. The measurements of silica content in coal dust samples using the PLSR model and standard infrared spectroscopy were compared. The relative standard deviation values of three parallel experiments are 8. 53% to 27. 33%,and the detection values of Raman spectrum and infrared spectrum are consistent. Raman spectroscopy reduces the detection limit while ensuring the reliability of the results,and the detection process is simple.

国家自然科学基金面上项目(52074274)

何沛东,冯温婷,郑丽娜.煤尘中游离二氧化硅含量的拉曼光谱测定法[J].矿业安全与环保,2025,52(1):105-110.

HE Peidong,FENG Wenting,ZHENG Lina. Determination of free silica content in coal dust by Raman spectroscopy[J]. Mining Safety & Environmental Protection,2025,52(1):105-110.