Keys to Successfully Using Geophysics to Detect Mine

Keys to Successfully Using Geophysics to Detect Mine

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

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Geophysical and Image Processing Methods for Detection of

Geophysical and Image Processing Methods for Detection of

Dec 06, 2018 (1989). Geophysical and Image Processing Methods for Detection of Fireholes in Brown Coal, Latrobe Valley. Exploration Geophysics: Vol. 20, No. 1-2, pp. 153-158

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A New Method for Detecting Goaf Area of Coal Mine :2D

A New Method for Detecting Goaf Area of Coal Mine :2D

Dec 01, 2012 A goaf area is referred to as a cavity where coal has been removed or mined out. These cavities will change the original geostress equilibrium of stratigraphic system and cause local geostress focusing or concentration. Consequently, the surrounding rock of a goaf may be deformed, fractured, displaced and caved resulting from the combined effect of gravity and geostress. In the cases of little

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Remote detection of underground coal mine fires using

Remote detection of underground coal mine fires using

Sep 01, 1995 OSTI.GOV Journal Article: Remote detection of underground coal mine fires using geophysical methods Title: Remote detection of underground coal mine fires using geophysical methods Full Record

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Detection and delineation of coal mine fire in Jharia coal

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

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GEOPHYSICAL METHODS IN EXPLORATION AND

GEOPHYSICAL METHODS IN EXPLORATION AND

lows. The gravity method also enables a prediction of the total anomalous mass (ore tonnage) responsible for an anomaly. 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

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Overview on the application of geophysics in coal mining

Overview on the application of geophysics in coal mining

Jul 30, 2013 Highlights I review applications for geophysics in support of coal mining operations. I discuss techniques used for mapping coal seams and geotechnical characterisation. Methods for void detection and monitoring the ground response are also discussed. Future applications for geophysics are also considered

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Geophysical characterization of derelict coalmine

Geophysical characterization of derelict coalmine

The Coal Authority, 200, Lichfield Lane, Berry Hill, Mansfield, Nottinghamshire, NG18 4RG, UK. Received July 2007, revision accepted March 2008 shown to be very effective at detecting cleared building founda-tions and, indeed, mineshafts in some cases (McCann . et al. 1987). Resistivity measurements determined using direct electrical meth

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Mine Void Detection through Electrical ... - THG Geophysics

Mine Void Detection through Electrical ... - THG Geophysics

Aug 24, 2020 Electrical imaging can be an effective geophysical method for locating subsurface voids, specifically for deep-mine void detection. Publication Abstract: In the late 1800s, shallow subsurface mining of a local coal bed beneath a 25-foot thick sandstone resulted in

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Electrical resistivity of coal-bearing rocks under high

Electrical resistivity of coal-bearing rocks under high

Dec 31, 2015 The geophysical characteristics of coal and rock (such as magnetic susceptibility, remanent magnetization, self-potential and resistivity) in coal-fire areas will be changed dramatically at high temperature, which constitutes the foundation of corresponding geophysical methods to detect coal

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A method of detecting and characterizing subsurface

A method of detecting and characterizing subsurface

The electromagnetic method in geophysical prospecting applications has become a powerful tool in detecting and de lineating layered subsurfaces of interest, such as geothermal reservoirs [1], ground water [2, 3] and coal deposits [4], This method has also been used to detect local zones of mas

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method for detecting and locating geophysical events

method for detecting and locating geophysical events

Sep 22, 2015 In this paper, we use waveform data from the TA network to illustrate an improved method for detecting and locating geophysical events. The method, in which a network of sensors is recast as a large collection of three-element arrays, is broadly applicable to mechanical waves recorded by collections of closely spaced sensors

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Geophysical Methods & Applications

Geophysical Methods & Applications

Geophysical Methods & Applications SubSurface Surveys & Associates, Inc., established in 1988, specializes in near-surface geophysics and utility locating services and is dedicated to establishing strong client relationships. SubSurface Survey’s extensive education and experience

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Geophysical Technologies to Image Old Mine Works

Geophysical Technologies to Image Old Mine Works

Jan 15, 2007 Thus, there is a need to utilize geophysical imaging technologies to accurately locate old mine works. Several surface and borehole geophysical imaging methods and mapping techniques were employed at a known abandoned coal mine in eastern Illinois to investigate which method best map the location and extent of old works

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Detection of Underground Voids in Ohio by Use of

Detection of Underground Voids in Ohio by Use of

methods are technically feasible for detection of subsurface voids in Ohio, but ease of use and interpretation varies widely between the methods. Ground-penetrating radar is the most rapid and cost-effective method for collection of subsurface data in areas associated with voids under roadways

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Literature survey on the advance detection of dykes in

Literature survey on the advance detection of dykes in

literature survey, different exploration and geophysical methods that could be used to detect dykes ahead of underground coal mine workings. In this study a range of geophysical and exploration methods have been identified which are generally used in the mining industry. Each different method

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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND

GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND

Dec 01, 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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