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Electrical Monitoring Criterion for Water Flow in Faults Activated by Mining

Content Provider	Springer Nature Link
Author	Xu, Jinpeng Liu, Shengdong Wang, Bo Zhang, Peng Gui, Hui
Copyright Year	2012
Abstract	Water flow in faults made permeable by mining is potentially hazardous. We have found that (1) water flow due to this type of fault activation (FA) often occurs in the goaf near the working face (a zone of reduced stress); (2) the resistivity of the face goaf floor increases under normal conditions; and (3) electrical resistivity is obviously reduced during FA. At the Geting Coal Mine in China’s Shandong Province, the decrease in resistivity exceeded 40 Ωm when the fault began seeping. An experiment conducted at Face 2313 of the Geting Coal Mine showed that it is feasible to use electrical measurements to monitor and predict FA. Based on these conclusions, we established a monitoring criterion for FA.Wassereinbrüche auf Störungen, die durch den Bergbau durchlässig wurden, sind potentiell gefährlich. Wir haben herausgefunden, dass (1) Wassereinbrüche durch die Störungsreaktivierung oftmals im Alten Mann nahe des Abbauorts auftreten (Auflockerungszone), (2) der elektrische Widerstand an der Sohle des Abbauortes unter normalen Bedingungen ansteigt, und (3) der elektrische Widerstand offensichtlich durch die Störungsreaktivierung erniedrigt wird. Im Kohlenbergwerk Geting in der chinesischen Provinz Shandong sank der elektrische Widerstand um mehr als 40 Ωm, wenn Wasser aus der Störung zu sickern begann. Ein Experiment am Abbauort 2313 im Kohlebergwerk Geting zeigt, dass die Eigenpotentialüberwachung zur Kontrolle und Prognose der Störungsreaktivierung anwendbar ist. Anhand dieser Ergebnisse haben wir Überwachungskriterien für reaktivierte Störungen formuliert.El flujo de agua en fallas convertidas en permeables por la minería, es potencialmente peligroso. Hemos encontrado que (1) el flujo de agua debido a este tipo de activación por falla (FA) frecuentemente ocurre en las escombreras cerca del frente de trabajo (una zona de stress reducido); (2) la resistividad del piso de la escombrera se incrementa bajo condiciones normales; y (3) la resistividad eléctrica es obviamente reducida durante FA. En la mina de carbón Geting en la provincia de Shandong en China, el descenso en resistividad excedió 40 Ωm cuando la falla comenzó a filtrar. Un experimento realizado en la cara 2313 de la mina de carbón Getting, mostró que era factible usar medidas eléctricas para monitorear y predecir FA. Basados en estas conclusiones, hemos establecido un criterio de monitoreo de FA.在采动条件下,断层活化是煤矿突水的重要原因。研究发现:(1) 断层活化、导水主要发生在工作面采空区(应力降低区);(2) 在一般情况下,工作面采空区(应力降低区)电阻率升高;(3) 断层发生活化、导水时,断层电阻率明显降低。当山东省葛亭煤矿F6断层的电阻率降至40 Ωm以下时,断层开始渗水。葛亭煤矿2313工作面井下监测试验证明,通过断层电阻率监测来预测断层活化是可行的,文章建立了断层活化的监测标准。
Starting Page	172
Ending Page	178
Page Count	7
File Format	PDF
ISSN	10259112
Journal	Mine Water and the Environment
Volume Number	31
Issue Number	3
e-ISSN	16161068
Language	Chinese
Publisher	Springer-Verlag
Publisher Date	2012-05-22
Publisher Institution	International Mine Water Association (IMWA)
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	China Electrical measurement Fault activation Monitoring criterion Shandong Water flow Energy Economics Hydrogeology Sedimentology Ecotoxicology Geology
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Geotechnical Engineering and Engineering Geology

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