Research on Mid-infrared Spectral Characteristics and Prediction Models of Sandstone in Different Water Content

CHEN Lu; CHANG Long-fei; SHEN Mu-ao; ZHANG Ming-yuan; LI De-jian; LI Ying-jun

doi:10.12452/j.fxcsxb.23091801

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Research on Mid-infrared Spectral Characteristics and Prediction Models of Sandstone in Different Water Content

Experimental Techniques and Methods | 更新时间：2024-03-13

- Research on Mid-infrared Spectral Characteristics and Prediction Models of Sandstone in Different Water Content
- Journal of Instrumental Analysis Vol. 43, Issue 3, Pages: 489-495(2024)
- 作者机构：
  
  1.华北科技学院应急技术与管理学院，河北三河 065201
  2.中国矿业大学（北京）深部岩土力学与地下工程国家重点实验室，北京 100083
  3.中国科学院物理研究所，北京 100190
- 作者简介：
- 基金信息：
- DOI：10.12452/j.fxcsxb.23091801
  CLC： O657.3;P313.1
- Published：15 March 2024，
  
  Received：18 September 2023，
  
  Revised：14 December 2023，
- 稿件说明：
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陈露,常龙飞,沈沐傲等.不同含水量砂岩的中红外光谱特征与预测模型研究[J].分析测试学报,2024,43(03):489-495.

CHEN Lu,CHANG Long-fei,SHEN Mu-ao,et al.Research on Mid-infrared Spectral Characteristics and Prediction Models of Sandstone in Different Water Content[J].Journal of Instrumental Analysis,2024,43(03):489-495.
陈露,常龙飞,沈沐傲等.不同含水量砂岩的中红外光谱特征与预测模型研究[J].分析测试学报,2024,43(03):489-495. DOI： 10.12452/j.fxcsxb.23091801.

CHEN Lu,CHANG Long-fei,SHEN Mu-ao,et al.Research on Mid-infrared Spectral Characteristics and Prediction Models of Sandstone in Different Water Content[J].Journal of Instrumental Analysis,2024,43(03):489-495. DOI： 10.12452/j.fxcsxb.23091801.

摘要

水对岩石具有软化、溶蚀等作用，准确预测岩石的含水量对岩土工程的地下深部开采至关重要。该文将中红外光谱技术应用于砂岩的含水量分析，研究了不同砂岩样品的中红外光谱特征与其含水量之间的关系。通过多种预处理方法提取有效特征向量，构建了针对砂岩含水量的中红外光谱预测模型。结果表明，多元散射校正+偏最小二乘法、归一化特征向量提取+随机森林及一阶微分+支持向量机 3种模型在测试集上预测的含水量与实测值之间的相关系数（

）分别为0.985、0.995和0.951，均方根误差分别为0.074、0.022和0.137，即特征向量提取+随机森林的预测模型效果最佳。该方法通过中红外光谱技术实现了砂岩含水量的无损、快速分析，为地质工程中砂岩的水分预测提供了参考。

Abstract

The water can soften and dissolve rocks，it is very important to predict the water content of rocks accurately for deep underground mining of geotechnical engineering. In this paper，the mid-infrared spectroscopy was applied to analyze the water content of sandstone. The relationship between the mid-infrared spectral characteristics and water content of sandstone samples was studied. The effective feature vectors were extracted by various pretreatment methods，and an mid-infrared spectral prediction model for water content of sandstone was constructed. The results showed that the correlation coefficients

between the predicted and measured values on the test set for multiple scattering correction+partial least squares，feature vector extraction+random forest and first order differential+support vector machine were 0.985，0.995 and 0.951，respectively. The root-mean-square errors were 0.074，0.022 and 0.137. All of them can predict the water content of sandstone well，and the prediction model combining feature vector and random forest had the best effect. This method realizes non-destructive and rapid water content analysis of sandstone by mid-infrared spectroscopy，providing a reference for water prediction of sandstone in geological engineering.

关键词

中红外光谱砂岩含水量预测

Keywords

mid-infrared spectrumsandstonewater contentforecast

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