geophysical detection of water in coal mines

Detection of Abandoned Underground Coal Mines by …
Detection of Abandoned Underground Coal Mines by …

City sensors are to be found in detection equipment used in the world’s main coal mining regions. The top four regions are China, which in 2011 accounted for just under 50% of world coal production, the USA with a 14% share, India which accounts for 6% and

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Water Detection within the Working Face of an …
Water Detection within the Working Face of an …

19 GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL ENVIRONMENTAL INVESTIGATIONS by Donald B. Hoover, Douglas P. Klein, and David C. Campbell INTRODUCTION In the following discussion, the applicability of geophysical methods to

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Detection of Underground Voids in Ohio by Use of Geophysical …
Detection of Underground Voids in Ohio by Use of Geophysical …

Key technical problems in the application of TEM in water hazard control in coal mines In water control in coal mines, the effect of TEM application is evident in geophysical exploration of mining districts in coal mines, detection of water passages inducing

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SURFACE GEOPHYSICAL METHODS FOR DETECTION OF …
SURFACE GEOPHYSICAL METHODS FOR DETECTION OF …

ORIGINAL ARTICLE Mapping and detection of land use change in a coal mining area using object-based image analysis Wenming Pei1 • Suping Yao1 • Joseph F. Knight2 • Shaochun Dong3 • Keith Pelletier2 • Lian P. Rampi2 • Yan Wang2 • Jim Klassen2

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JOINT INVERSION OF SEISMIC AND GEOELECTRIC DATA …
JOINT INVERSION OF SEISMIC AND GEOELECTRIC DATA …

Geophysical methods can have a role in monitoring the effectiveness of gas drainage by virtue of the fact that water needs to be drained from coal before gas will flow. Undrained coal retains its moisture and electrically, wet coal is more conductive

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Detection of Coal Mines Using Apparent Conductivity | …
Detection of Coal Mines Using Apparent Conductivity | …

characteristics of ground penetrating radar images are analyzed based on the detection results of No.015 water proof ... operation of coal mines in China is water inrushes from the Ordovician ...

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Industry Investment NSW
Industry Investment NSW

In North China coal basin, there is an accident: the water which comes from Ordovician system aquifer (O2) discharges into underground coal mines. The coal mining operations would be seriously ...

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Keys to Successfully Using Geophysics to Detect Mine Voids and …
Keys to Successfully Using Geophysics to Detect Mine Voids and …

Uncertain knowledge of abandoned coal mines also imposes potential hazards in coal excavation operations since water inundation or the release of methane gas is a principal hazard when mine excavation operations break into an abandoned mine.

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Detection of Abandoned Underground Coal Mines by …
Detection of Abandoned Underground Coal Mines by …

In water control in coal mines, the effect of TEM application is evident in geophysical exploration of mining districts in coal mines, detection of water passages inducing flooding of mine from water-accumulating abandoned mines, high precision detection of water

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Magnetotelluric monitoring of coal seam gas …
Magnetotelluric monitoring of coal seam gas …

geophysical intrument for coal mine Overview of coal mining problems safe and efficient coal extraction is often compromised by a variety of geological and mininginduced problems in this paper we will focus on the five most commonly occurring problems and explain ...

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Prediction Technology of Buried Water-Bearing Structures …
Prediction Technology of Buried Water-Bearing Structures …

The paper based on the geophysical characters of the mined-out areas analyzes the principles of the three geophysical techniques which contain crosswell seismic,ground penetrating radar(GRP) and TEM.The method of crosswell seismic can be continuously ...

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Detection and delineation of coal mine fire in Jharia coal field, …
Detection and delineation of coal mine fire in Jharia coal field, …

According to the principle and grading standards of DC electric in-advance detection, the paper analyzed the geophysical characteristics of gob in abandoned coal mines, summed up the verified characteristics of DC electric anomalies in advanced detection of goaf water. ...

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Synergetic System for Water Body Detection in Coal …
Synergetic System for Water Body Detection in Coal …

 · Geophysical methods are being used in underground coal mines to evaluate the presence of stress buildup, voids, fracture zones and other ground control problems. A number of criteria distinguish this type of investigation from the more typical seismic exploration ...

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Electrical resistivity of coal-bearing rocks under high …
Electrical resistivity of coal-bearing rocks under high …

Detection, localization and backfill assessment of old mining shafts in the Upper Silesia Coal basin with geophysical methods Conference Paper (PDF Available) · September 2008 ...

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Hazard detection and comprehensive control technologies of the integrated resource coal …
Hazard detection and comprehensive control technologies of the integrated resource coal …

GEOPHYSICAL METHODS TO DETECT STRESS IN UNDERGROUND MINES By Douglas F. Scott, 1 1 Geologist, Spokane Research Laboratory, National Institute for Occupational Safety and Health, Spokane, WA. Theodore J. Williams, 2 David K. Denton, 2 2

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