Research on real time measurement model and measurement system for gas concentration in extraction drilling
Abstract Accurate and real-time monitoring of methane concentration at extraction boreholes is critical for intelligent gas management in coal seams. Although tunable diode laser absorption spectroscopy (TDLAS) offers high sensitivity and rapid response, its performance is limited under complex unde...
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| Format: | Article |
| Language: | English |
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Springer
2025-06-01
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| Series: | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
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| Online Access: | https://doi.org/10.1007/s40948-025-00988-6 |
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| _version_ | 1849334496680214528 |
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| author | Dayang Yu Junhao Zhu Xing Li An He Huaiqian Liu Changjiang Chen Yong Liu |
| author_facet | Dayang Yu Junhao Zhu Xing Li An He Huaiqian Liu Changjiang Chen Yong Liu |
| author_sort | Dayang Yu |
| collection | DOAJ |
| description | Abstract Accurate and real-time monitoring of methane concentration at extraction boreholes is critical for intelligent gas management in coal seams. Although tunable diode laser absorption spectroscopy (TDLAS) offers high sensitivity and rapid response, its performance is limited under complex underground conditions due to low signal-to-noise ratios and lack of effective environmental compensation, leading to reduced detection accuracy at low concentrations. This study develops an enhanced TDLAS-based detection system that integrates wavelength modulation spectroscopy (WMS) with a centroid-weighted Lagrange interpolation algorithm. The system accounts for fluctuations in borehole gas composition, pressure, and temperature, enabling dynamic compensation for spectral distortion and improved measurement reliability. Experimental validation using 0.5% and 4.5% CH₄ standard gases yielded the following key findings:(1) Methane concentration accuracy is highly dependent on line strength and spectral shape, both sensitive to temperature and pressure. (2) The Lorentzian profile was selected as the optimal line shape for pressure-broadened conditions, and the proposed interpolation algorithm effectively compensates for dual-variable spectral shifts. (3) The system achieves a maximum measurement error below 0.5%, demonstrating strong robustness and precision in variable environments. This work provides a compact, accurate, and environment-adaptive solution for methane monitoring at borehole outlets and supports the development of intelligent gas sensing systems in coal mining applications. |
| format | Article |
| id | doaj-art-f3f1be5fc5f84cfabd1e6648c83a9269 |
| institution | Kabale University |
| issn | 2363-8419 2363-8427 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Springer |
| record_format | Article |
| series | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| spelling | doaj-art-f3f1be5fc5f84cfabd1e6648c83a92692025-08-20T03:45:32ZengSpringerGeomechanics and Geophysics for Geo-Energy and Geo-Resources2363-84192363-84272025-06-0111111410.1007/s40948-025-00988-6Research on real time measurement model and measurement system for gas concentration in extraction drillingDayang Yu0Junhao Zhu1Xing Li2An He3Huaiqian Liu4Changjiang Chen5Yong Liu6State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversityState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversityState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversityJiangnan Shipbuilding (Group) Co., Ltd.State Key Laboratory of Mining·Response and Disaster Prevention and Control in Deep·Coal MinesState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversityState Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic UniversityAbstract Accurate and real-time monitoring of methane concentration at extraction boreholes is critical for intelligent gas management in coal seams. Although tunable diode laser absorption spectroscopy (TDLAS) offers high sensitivity and rapid response, its performance is limited under complex underground conditions due to low signal-to-noise ratios and lack of effective environmental compensation, leading to reduced detection accuracy at low concentrations. This study develops an enhanced TDLAS-based detection system that integrates wavelength modulation spectroscopy (WMS) with a centroid-weighted Lagrange interpolation algorithm. The system accounts for fluctuations in borehole gas composition, pressure, and temperature, enabling dynamic compensation for spectral distortion and improved measurement reliability. Experimental validation using 0.5% and 4.5% CH₄ standard gases yielded the following key findings:(1) Methane concentration accuracy is highly dependent on line strength and spectral shape, both sensitive to temperature and pressure. (2) The Lorentzian profile was selected as the optimal line shape for pressure-broadened conditions, and the proposed interpolation algorithm effectively compensates for dual-variable spectral shifts. (3) The system achieves a maximum measurement error below 0.5%, demonstrating strong robustness and precision in variable environments. This work provides a compact, accurate, and environment-adaptive solution for methane monitoring at borehole outlets and supports the development of intelligent gas sensing systems in coal mining applications.https://doi.org/10.1007/s40948-025-00988-6Pumping boreholeSingle-hole meteringMonitoring systemTDLAS technologyCompensation algorithm |
| spellingShingle | Dayang Yu Junhao Zhu Xing Li An He Huaiqian Liu Changjiang Chen Yong Liu Research on real time measurement model and measurement system for gas concentration in extraction drilling Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pumping borehole Single-hole metering Monitoring system TDLAS technology Compensation algorithm |
| title | Research on real time measurement model and measurement system for gas concentration in extraction drilling |
| title_full | Research on real time measurement model and measurement system for gas concentration in extraction drilling |
| title_fullStr | Research on real time measurement model and measurement system for gas concentration in extraction drilling |
| title_full_unstemmed | Research on real time measurement model and measurement system for gas concentration in extraction drilling |
| title_short | Research on real time measurement model and measurement system for gas concentration in extraction drilling |
| title_sort | research on real time measurement model and measurement system for gas concentration in extraction drilling |
| topic | Pumping borehole Single-hole metering Monitoring system TDLAS technology Compensation algorithm |
| url | https://doi.org/10.1007/s40948-025-00988-6 |
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