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Geothermal Water at a Coal Mine: From Risk to Resource

Geothermale Wässer in einem Kohlenbergbau: Vom Risiko zum Bodenschatz

Agua geotermal en una mina de carbón: del riesgo al recurso

煤矿地下热水:从安全危胁到可利用水资源

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Abstract

Geothermal water from a Cambrian limestone aquifer presented a flooding risk at the No. 8 coal 21 mine near Pingdingshan City, China. The water-bearing zones were identified using the mine transient electromagnetic method and direct current prospecting, and a groundwater drainage system was installed. After water drainage was implemented, the water level in the limestone near the haulway dropped 17.2 m in 277 days, greatly reducing the risk of a mine water inrush. The water quality, quantity, and temperature allowed it to be used for mineral baths, resulting in energy savings and emission reductions.

Zusammenfassung

Geothermale Wässer aus einem kambrischem Kalksteinaquifer bedrohten die Nr. 8 Kohlenmine nahe von Pingdingshan City, China, durch das Risiko eines Einbruches und Flutung. Die wasserführenden Zonen wurden mittels transienter elektromagnetischer Methoden (TEM) und Gleichstromerkundung (DC) bestimmt und ein Dränagesystem eingerichtet. Nach Fertigstellung der Dränage fiel der Wasserspiegel im Kalkstein neben der Förderstrecke 17,2 m in 277 Tagen, wodurch das Risiko eines Wassereinbruchs stark reduziert wurde. Qualität, Quantität und Temperatur des Wassers ermöglichten eine Nutzung für Mineralbäder, wodurch Energie gespart und Emissionen reduziert wurden.

Resumen

El agua geotermal de un acuífero Cambrian formado por calizas, presentaba un riesgo de inundación en la mina de carbón 21 cerca de la ciudad de Pingdingshan, China. Las zonas acuíferas fueron identificadas usando la prospección por el método electromagnético transiente (TEM) y corriente directa (DC); se instaló un sistema de drenaje del agua subterránea. Después de implementar el drenaje de agua, el nivel del agua en la caliza cerca de su recorrido descendió 17,2 m en 277 días, reduciendo significativamente el riesgo de irrupción de agua en la mina. Debido a su cantidad, calidad y temperatura, el agua pudo ser usada en baños minerales, lo que produjo ahorro de energía y reducción de las emisiones.

摘要

寒武系岩溶热水对平顶山矿区(中国河南)8号煤矿21煤层安全回采构成突水威胁。运用井下瞬变电磁(TEM)及直流电法(DC)勘探煤层下伏岩溶富水区,安装配套井下排水系统。经含水层疏水降压,井田大巷附近岩溶水位277天内下降17.2 m,大幅降低矿井突水危险。岩溶水水质、水量及水温特征使其宜作矿泉热水,将能节省能源,减少水资源浪费。

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant 41272250) and Henan Province’s Technological Innovation Team of Colleges and Universities (Grant 15IRTSTHN027).

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Authors and Affiliations

  1. College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China

    Qi Wang & Quanlin Hou

  2. Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, 454000, China

    Xinyi Wang

  3. Institute of China Pingmei Shenma Group, Pingdingshan, 467000, China

    Xinyi Wang

Authors
  1. Qi Wang
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  2. Xinyi Wang
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  3. Quanlin Hou
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Corresponding author

Correspondence to Qi Wang.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Supplementary material 1 (DOCX 14 kb)

Supplemental Fig. 1

Contour map of the geothermal gradient in the No. 8 mine (PDF 399 kb)

Supplemental Fig. 2

Profile map of apparent resistivity detected by the TEM vertical test (PDF 391 kb)

Supplemental Fig. 3

Profile map of apparent resistivity detected by the DC vertical test (PDF 391 kb)

Supplemental Fig. 4

Water transport and distribution system from the west alley to the ground (PDF 382 kb)

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Wang, Q., Wang, X. & Hou, Q. Geothermal Water at a Coal Mine: From Risk to Resource. Mine Water Environ 35, 294–301 (2016). https://doi.org/10.1007/s10230-015-0352-6

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