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  • Geophysics at the Coal-Face: Exploration Geophysics: Vol

    The geophysical methods which have been used in the reconnaissance, pre-development, and operational stages of coal exploration and mining are reviewed in terms of their exploratory function and their typical frequency of application. Borehole logging is the one method which is highly utilised for both surface and underground coal mining exploration, although seismic methods (mainly high

  • Geophysical Method an overview ScienceDirect Topics

    Geophysical methods have been used for many years in the search for metallic ore bodies and petroleum fields and are increasingly being applied to coal exploration programs. If the coal basin is underlain by rocks that are denser than or have different magnetic properties from those associated with the coal seams, maps showing the pattern of variation across the area in the earth's

  • Coal Exploration an overview ScienceDirect Topics

    Geophysical methods have been used for many years in the search for metallic ore bodies and petroleum fields, and are also useful at different scales in many coal exploration programs. If the coal basin is underlain by rocks that are denser than or have different magnetic properties from those associated with the coal seams, maps showing the pattern of variation across the area in the earth's

  • Coal Geology Geoscience Australia

    Modern coal exploration typically involves extensive use of geophysical surveys, including 3D seismic surveys aimed at providing detailed information on the structures with the potential to affect longwall operations, and drilling to determine coal quality and thickness. Mining. Coal is mined by both surface or ‘opencut’ (or opencast) and underground or ‘deep’ mining methods, depending

  • Coal Exploration and Geophysical Logging, with Insitu

    Coal seams can also be evaluated insitu by geophysical means for their coalbed methane content. All of this work can be accomplished by geophysical tools that run inside the drilling rods. page 3. In-situ Coal Deposit Evaluation Methods. Coal deposits occur in sedimentary strata that have some lateral extent. They can also be affected by

  • Geosensing Techniques for Mineral Exploration and Mine

    Geophysical techniques have been applied to petroleum exploration since early in the 20th Century. More recently geophysical methods have been applied in detail to mineral and coal exploration. As a generalisation, geophysical techniques have not been applied in the areas of mine planning, development and production.

  • Geophysical Methods, Exploration Geophysics » Geology

    Geophysical methods respond to the physical properties of the subsurface media (rocks, sediments, water, voids, etc.. ) and can be used Successfully when one region differs sufficiently from another in some physical property. Passive methods . Which detect variations within the natural fields associated with the earth, like the gravitational and magnetic fields, such as gravit, magnetic, some

  • (PDF) GEOPHYSICAL TECHNIQUES AND THEIR

    The method has also been reported for chromate, iron, manganese, copper sulfides ore, and coal exploration (Table 2). Table 1: Classification of geophysical techniques as per signal generation Classifi Method Principle Depth of Survey Source cation penetration method Passive Magnetic Measures variation in 0-20 km Ground, sea, (Kamil, 2008; susceptibility of (ground data usually airborne

  • GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL

    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 geoenvironmental studies of ore deposits is reviewed. Details of geophysical techniques are not emphasized; these are covered in standard texts (Society of Exploration

  • Geophysical Methods of Exploration

    The most commonly used first step in geophysical exploration is the aeromagnetic survey. A magnetometer or array of magnetometers are installed in a stinger, in wingtip pods, or towed beneath the aircraft. These magnetometers measure variations in the intensity of the earth's magnetic field, thereby permitting the detection of magnetic anomalies caused by the minerals that are present in the

  • Coal Geology Geoscience Australia

    Modern coal exploration typically involves extensive use of geophysical surveys, including 3D seismic surveys aimed at providing detailed information on the structures with the potential to affect longwall operations, and drilling to determine coal quality and thickness. Mining. Coal is mined by both surface or ‘opencut’ (or opencast) and underground or ‘deep’ mining methods, depending

  • Application of Comprehensive Geophysical Prospecting

    Application of Comprehensive Geophysical Prospecting Method in the Exploration of Coal Mined-Out Areas. Xiao Luo, 1,2,3 Shuang Gong, 4,5,6 Zhonggang Huo, 1,2 Hongyan Li, 1,2 and Xinpin Ding 1,2. 1 Mine Safety Technology Branch of China Coal Research Institute, Beijing 100013, China. 2 State Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute), Beijing 100013

  • Assessment of a Geophysical Coal Exploration Method

    Advances in geophysical methods may provide tools to supplement the traditional methods of coal exploration. In this study, two seismic methods, multi-channel analysis of surface waves (MASW) and shear wave (SH-wave) analysis, were evaluated to determine their usefulness as coal exploration tools. It was determined that (1) the MASW method was useful to model the relief on the bedrock surface

  • CSIRO PUBLISHING Exploration Geophysics

    The geophysical methods which have been used in the reconnaissance, pre-development, and operational stages of coal exploration and mining are reviewed in terms of their exploratory function and their typical frequency of application. Borehole logging is the one method which is highly utilised for both surface and underground coal mining exploration, although seismic methods (mainly high

  • Coal Exploration and Geophysical Logging, with Insitu

    Coal seams can also be evaluated insitu by geophysical means for their coalbed methane content. All of this work can be accomplished by geophysical tools that run inside the drilling rods. page 3. In-situ Coal Deposit Evaluation Methods. Coal deposits occur in sedimentary strata that have some lateral extent. They can also be affected by

  • Oil and gas exploration geophysical surveys methods

    Geophysical surveys in the oil industry plays a key role in the exploration and recognition of oil and gas deposits. It provides detailed data about hydrocarbon deposits which are often located at great depths, and at the same time allows for the correct location of drilling.

  • Circular 891 Geophysical Logs as a Source of Coal Bed

    It should be noted that coal exploration programs increasingly have become reliant on coal-oriented geophysical logs, which provide important data on thickness, depth, and correlation of coal beds, and locally on the composition of coal. A carefully chosen suite of coal-oriented logs can provide positive recognition of coal, identification of specific coal beds, and precise coal thickness

  • Geosensing Techniques for Mineral Exploration and Mine

    Geophysical techniques have been applied to petroleum exploration since early in the 20th Century. More recently geophysical methods have been applied in detail to mineral and coal exploration. As a generalisation, geophysical techniques have not been applied in the areas of mine planning, development and production.

  • Exploration GRL Coal

    In August 2018, GRL also commissioned an assessment of the suitability of geophysical methods for the identification of known strata within the Basin as a tool to assist in the design of future exploration activities. The assessment methods were initially trialled in an area adjacent to Woods Road and the outcomes correlated with prior drilling results. Following the identification of the most

  • (PDF) GEOPHYSICAL TECHNIQUES AND THEIR

    The method has also been reported for chromate, iron, manganese, copper sulfides ore, and coal exploration (Table 2). Table 1: Classification of geophysical techniques as per signal generation Classifi Method Principle Depth of Survey Source cation penetration method Passive Magnetic Measures variation in 0-20 km Ground, sea, (Kamil, 2008; susceptibility of (ground data usually airborne