geophysical methode for detecting coal

A Review of Geophysical Exploration Technology for Mine ...

2017-6-12 · 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. However, such technologies can be influenced by many factors, such as roadways, fissures in the surrounding rocks, and various ...

Geophysical Methods & Applications

2007-5-4 · Geophysical Methods & Applications SubSurface Surveys & Associates, Inc., established in 1988, specializes in near- surface geophysics and utility locating services and is dedicated to establishing

Circular 891

GEOPHYSICAL LOGS AS A SOURCE OF COAL BED DATA. Geophysical well logs have been invaluable in the search for oil and gas because they provide rapid, economical, and detailed information on the thickness, lithologic characteristics, fluid content, correlation, structure, and depth of strata penetrated by a well.

Research and Application of In-seam Seismic Survey ...

(PDF) A Guide for Applying Geophysics to Coal Mining ...

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

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 fires.

Application of Integrated Geophysics Method for …

2014-8-21 · coal mine, three-point and three-electrode sounding method, three electrode sounding depth method and transient electromagnetic method were employed to detect collapse column. On the basis of integrated geophysics, we reached major conclusions as following: the boundary of collapse column is between detecting number 7 to

Geophysical method of exploration of coal

Geophysical method of exploration of coal Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Geophysical method of exploration …

Geophysical Void Detection Demonstrations …

2008-8-23 · GEOPHYSICAL METHODS The selected geophysical methods were employed at the same survey site to provide: 1) a more comprehensive data interpretation; 2) the basis for the performance evaluation; and 3) to determine the advantages and limitations of these technologies to detect accurately mine voids in a cost-effective manner.

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.

SURFACE GEOPHYSICAL METHODS FOR DETECTION OF …

2010-3-30 · Other Methods, such as magnetics and ground penetrating radar have been used for detecting subsurface cavities, but can be subject to precision, interference, or depth limitations which restrict their use in mining applications. Project experience with various surface geophysical methods demonstrates that commer-

GEOPHYSICAL VOID DETECTION DEMONSTRATIONS

2008-8-23 · The geophysical technologies demonstration at the site has verified the effectiveness of the.… RVSPRVSP When Complemented by Sonar or Laser Mapping Combined with Engineering Practices – the most viable geophysical method to… Accurately and Economically Detect Mine Voids ¾Conclusions and Recommendations

(PDF) A Guide for Applying Geophysics to Coal Mining ...

Geophysical methods, including gravity, electrical resistivity, ground penetrating (GPR), and airborne thermal imaging methods (e.g. Breytenbach and Bosch 2011;Van Schoor 2002; Van Schoor and ...

Keys to Successfully Using Geophysics to Detect Mine …

2019-1-23 · Keys to Successfully Using Geophysics to Detect Mine Voids and Covered Sinkholes Geotechnical, Geophysical, Geoenvironmental ... Geophysical Methods for Void Detection ... Geophysical Imaging of an Underground Coal Mine Geophysical Imaging of a …

ProxInLAS, a software program for detecting coal layers ...

2019-3-22 · The present paper describes the algorithm and working method for detection and estimation of proximate parameters of coal beds based on digital well-log data. Designed and developed by the authors in Visual Studio using C#, ProxInLAS is used to define a threshold value on each log to distinguish between coal and non-coal layers, followed by estimating each of the coal proximate …

4 summAry of coAl problems And possIble geophysIcs …

2021-9-11 · geophysical methods, such as electrical imaging and gravity, may also be able to detect intrusive bodies, but these methods are generally more time-consuming and costly to apply. In cases where the intrusions occur at depths of several tens of metres and traditional electrical or EM methods may be of limited applicability, the controlled-source ...

GEOPHYSICAL METHODS IN EXPLORATION AND …

2004-4-5 · 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

Geophysical Detection of Outbursts | Outburst ...

Geophysical techniques are widely used for these purposes in resource exploration and extraction. Because coal outbursts can be associated with geological structures and with zones of anomalous states of saturation and stress, geophysical techniques can be used to detect such situations. There may also be precursors to coal outbursts which can ...

REVIEW: GEOPHYSICAL METHODS FOR DETECTION AND

2005-12-9 · Fmre 1 Shallow seismic reflection section showing bedrock surface anddissolution features associated with mapped faults (from Dobeck et al.. 1989). bireftinsence (splittins into fast and slow components) which ate 1) shallow, 2) large and3) air-fined The first two when such a wave passes through a fractured rock mass points are valid for any geophysical method; the latter is

Archived: Locating and Characterizing Abandoned Mines ...

2018-2-12 · Geophysical Technologies for Detecting Underground Coal Mine Voids Forum July 28-30, 2003 – Lexington, Kentucky LOCATING AND CHARACTERIZING ABANDONED MINES USING MICROGRAVITY by Richard C. Benson1, Ronald D. Kaufmann1, Lynn Yuhr1, Richard Hopkins2 ABSTRACT Surface geophysical methods can be an important part of any site characterization effort.

The Use of Geophysical Methods to Detect Abandoned …

2012-4-26 · In recent years, geophysical testing has been used as a tool to initially screen undermined sites in an effort to detect the location of possible voids or disturbed geologic strata. Using geophysical data, borings may be located in areas underlain by anomalous conditions, rather than on an arbitrary grid pattern. Two methods that appear to show ...

Geophysical Methods, Exploration Geophysics » Geology …

Geophysical methods may from part of a larger survey and thus geophysicists must be in contact with the whole survey team and particularly to the client. ... (coal, gas, oil) Regional geological studies (over areas of 100s of km2 ) ... Electromagnetic methods are used to detect metallic ore bodies. Seismic methods:

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 ...

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.

Overview on the application of geophysics in coal mining ...

2013-7-30 · Overview. 1. Introduction. The origins of the modern-day use of geophysics in coal mining date back to the 1970s and lie mainly in the United Kingdom and West Germany. At that time, the coal mines of these countries were mainly underground. They were getting deeper and the coal was becoming more difficult to win.

Detection of Abandoned Underground Coal Mines by ...

----- DETECTION OF ABANDONED UNDERGROUND COAL MINES BY GEOPHYSICAL METHODS by HRB-Singer, Incorporated Environmental Sciences Branch Science Park State College, Pennsylvania 16801 for the ENVIRONMENTAL PROTECTION AGENCY and the PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL RESOURCES Project 14010 EHN April 1971 For salo by the Superintendent of …

geophysical intrument for coal mine

2017-6-12 · 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.

method for detecting and locating geophysical events …

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.

Detecting top of coal

2016-4-13 · The method of detecting Top of Coal while drilling brings significant benefits to surface mining operations, including: Providing a reliable indication of approach to Top of Coal that will enable drilling to be stopped before touching coal or at a minimum …