مورد إلكتروني
Detection of abandoned coal mine goaf in China's Ordos Basin using the transient electromagnetic method
| العنوان: | Detection of abandoned coal mine goaf in China's Ordos Basin using the transient electromagnetic method |
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| بيانات النشر: | Berlin, Germany Springer-Verlag 2021. |
| تفاصيل مُضافة: | Wang Peng Wang Cheng Wang Qing Wang Yi |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The location of the goafs in many abandoned coal mines in the Ordos Basin is unknown, which causes risks for current mines. The transient electromagnetic (TEM) method is the main geophysical tool used to detect the goaf, but this can have problems due to factors such as EM interference and topographic influences. Discussion is presented of the optimal loop size for goaf detection by TEM in the Ordos Basin, transmission frequency, suppression of electromagnetic noise, and corrections for local topography. Numerical simulation results of primary and secondary fields show that the most powerful abnormal signal can be obtained for the common 100 m deep goaf of the Ordos Basin by using a loop at least 240 m × 240 m. Time compensation and a polynomial fitting algorithm can be used to separate and weaken the EM noise. The terrain height difference mainly affects TEM depth parameters, which can be modified to correct the topographic influence by considering the lateral continuity of the sedimentary strata. Exploration results from three study areas in the Shenfu Dongsheng coalfield, where many small coal mines have been mined by bord and pillar methods, suggest that detection results were consistent with those obtained by drilling results. The location of the goafs in many abandoned coal mines in the Ordos Basin is unknown, which causes risks for current mines. The transient electromagnetic (TEM) method is the main geophysical tool used to detect the goaf, but this can have problems due to factors such as EM interference and topographic influences. Discussion is presented of the optimal loop size for goaf detection by TEM in the Ordos Basin, transmission frequency, suppression of electromagnetic noise, and corrections for local topography. Numerical simulation results of primary and secondary fields show that the most powerful abnormal signal can be obtained for the common 100 m deep goaf of the Ordos Basin by using a loop at least 240 m × 240 m. Time compensation and a polynomial fitting algorithm can be used to separate and weaken the EM noise. The terrain height difference mainly affects TEM depth parameters, which can be modified to correct the topographic influence by considering the lateral continuity of the sedimentary strata. Exploration results from three study areas in the Shenfu Dongsheng coalfield, where many small coal mines have been mined by bord and pillar methods, suggest that detection results were consistent with those obtained by drilling results. |
| مصطلحات الفهرس: | China, coal, disused mines, electrical resistivity, electromagnetic emissions, ENVIRONMENT, goaf, mathematical methods, modelling, monitoring, sensors, topographic features, transient electromagnetic method, text |
| URL: | |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | und |
| أرقام أخرى: | UKMMM oai:icon.iom3.org:176625 https://doi.org/10.1007/s10230-020-00724-4 1309288469 |
| المصدر المساهم: | INSTITUTE OF MATS MINERALS & MINING From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1309288469 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |