geophysical methode for detecting coal

    GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND

    It is known that the heating of coal resp. coal host rocks changes its electrical resistivity and magnetic susceptibility. Hence the methods of choice are airborne magnetics and frequency

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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND

01.12.2009· Within the framework of the Sino-German research initiative "Innovative technologies for exploration, extinction and monitoring of coal fires in Northern China" a number of different geophysical methods have been applied to determine their use on coal fire detecting, accompanying the extinguishing processes, controlling of the extinction and finally monitoring the extinction success.

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A Review of Geophysical Exploration Technology for Mine

12.06.2017· Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water in-rushes and underground watercourses. Generally, in-mine seismic, DC resistivity, and transient electromagnetic methods are used for such purposes in China.

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SURFACE GEOPHYSICAL METHODS FOR DETECTION OF

There are several surface geophysical methods that are applicable to detect subsurface voids: ●Gravimetrymeasures variations in the acceleration of gravity. The strength of this ac- celeration generally depends on the density of the underlying material. Less massive zones, such as cavities, generally constitute relative gravitational lows.

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Detection and delineation of coal mine fire in Jharia coal

geophysical methods were used to detect the surface and subsurface coal mine fires. Geophysical techniques used in the present study are apparent resistivity, self-potential (SP), magnetic method and thermography. Geophysical anomalies such as low SP value of −60 mV, high negative magnetic response and low apparent resistivity value helped us to detect and delineate the fire and non-fire

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(PDF) A Guide for Applying Geophysics to Coal Mining

Among all these geophysical techniques, the gravity method had the most success and is still widely used to delineate potential subsidence zones, especially in dolomitic terrain. High-Resolution...

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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION

The geophysical methods applied could not distinguish between these zones. The combined results strongly suggest that the use of coal waste as a remediation layer covering waste dumps should be

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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION

Within the framework of the Sino-German research initiative "Innovative technologies for exploration, extinction and monitoring of coal fires in Northern China" a number of different geophysical methods have been applied to determine their use on coal fire detecting, accompanying the extinguishing processes, controlling of the extinction and finally monitoring the extinction success.

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Geophysical and Image Processing Methods for

Geophysical and Image Processing Methods for Detection of Fireholes in Brown Coal, Latrobe Valley. G. R. Pettifer Geological Survey of Victoria PO. Box 173 East Melbourne, VIC. 3002, N. Djordjevic J.K. Mineral Research Centre Isles Road lndooroopilly, OLD. 4068, D. Heislers Department of Water Resources 35 Spring Street Melbourne VIC 3000, J. Schaeffer State Electricity Commision of Victoria

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(PDF) A Guide for Applying Geophysics to Coal Mining

Geophysical methods, In-seam seismology: a method for detecting faults in coal seams ( UK). January 1983 . D.J. Buchanan; Modern longwall coal mining is capital intensive and demands regions

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Application of Comprehensive Geophysical Prospecting

And the distribution of mined-out areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method of the transient electromagnetic method (TEM) and controlled source audio-frequency magnetotellurics (CSAMT). Then, the borehole detection method is used to verify the goaf range obtained from comprehensive geophysical prospecting

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Keys to Successfully Using Geophysics to Detect Mine Voids

Geophysical Methods for Void Detection Geophysical Imaging of an Underground Coal Mine Geophysical Imaging of a Karst Sinkhole and Void Beneath Airport Runway. 5/5/2015 10 Geophysical Imaging of Sinkholes and Underground Voids Aerial Photo Sink Electrodes 130 170 ERI Profile Sink Electrodes 130 170 Geophysical Imaging of a Sinkhole May 5, 2015 20. 5/5/2015 11 Aerial Photo

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Detection of coal mine fires in the Jharia coal field

In order to take effective preventative or mitigating action, it is often critically important to detect new coal fires at the earliest opportunity and to monitor the progress of coal fires as they burn and spread. Geophysical methods, such as electrical and magnetic methods, have served this purpose for quite a long time (Chen 1997). The

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GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL

Some geophysical methods, such as gamma-ray spectrometry and remote sensing, measure surface attributes; Gravity and magnetic (discussed below) methods detect only lateral contrasts in density or magnetization, respectively. In contrast, electrical and seismic methods can detect vertical, as well as lateral, contrasts of resistivity and velocity or reflectivity. Applications of gravity to

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(PDF) SURFACE GEOPHYSICAL METHODS FOR

SURFACE GEOPHYSICAL METHODS FOR DETECTION OF UNDERGROUND MINE WORKINGS. Shafiq Ahmad. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 36 Full PDFs related to this paper. READ PAPER. SURFACE GEOPHYSICAL METHODS FOR DETECTION OF UNDERGROUND MINE WORKINGS. Download . SURFACE GEOPHYSICAL METHODS FOR DETECTION

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Methods of fault detection with geophysical data and

Potential-field geophysical methods for fault detection. Gravity and magnetic methods are of great value in the detection of faults and fractures. In the mining industry, potential-field methods are used for this purpose very commonly on a prospect scale. We encourage this near-universal mining experience to be used also in oil and gas development. Gravity and magnetic methods do not replace

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