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Geophysical Methode For Detecting Coal
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Sustainability | Free Full-Text | Methods for the Geophysical
Geophysical exploration methods are attractive for application in abandoned coal mines owing to their low cost and non-destructive detection of deep layers, and they are advantageous for characterising the geological structure, goaf distribution, …
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Detection, extinguishing, and monitoring of a coal fire in …
Thus, the costs and efficiency must be taken into account when choosing geophysical methods. Magnetic method and self-potential method are easy to perform and the cost is low, which make them suitable for detecting coal fire in Xinjiang. Both of them are nonintrusive geophysical methods but aim at different physical aspects of …
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Geophysical electrical potential inversion for grouting …
The proposed geophysical method is able to evaluate the grouting quality between the inner and outer walls of the wellbores by inverting the geologic electrical potential. ... Su et al. [17] monitored the resistivity of an underground coal seam to detect the underground water zones. All these existing researches have proven the time-lapse …
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Non-invasive geophysical methods for monitoring the …
Following this, pertinent engineering measures are implemented to preclude groundwater depletion and alleviate inundation accidents in coal seams. Geophysical methods, serving as non-destructive ...
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Detection of Underground Voids in Ohio by Use of …
Geophysical Methods By Jens Munk and Rodney A. Sheets ABSTRACT Geophysical methods are generally classified as electrical, potential field, and seismic methods. Each method type relies on contrasts of physical properties in …
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Detection of underground voids in Ohio by use of geophysical methods
Geophysical methods are generally classified as electrical, potential field, and seismic methods. Each method type relies on contrasts of physical properties in the subsurface. Forward models based on the physical properties of air- and water-filled voids within common geologic materials indicate that several geophysical methods are technically …
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Geological exploration of coal mine burnt rock and …
The self-potential (SP) method is a low-cost, non-invasive passive geophysical technique, and Sahadev et al. used the self-potential (SP) method to detect coal fires below the surface 15.
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Overview on the application of geophysics in coal mining
Since geophysical methods were introduced in the coal mining industry in the 1970s, they have become widespread around the world (Hatherly, 2013). However, predicting the intrusion morphology and ...
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Detection and delineation of coal mine fire in Jharia coal …
In this study, various 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 ...
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Application of Comprehensive Geophysical Prospecting Method …
Taking Zhaicun Iron Mine in Laizhou City as an example, in view of the blindness and complexity of non-coal mine goaf with historical formation and responsibility loss, geophysical methods such as high-precision magnetic method, high-density resistivity method and shallow seismic method are adopted. Combined with the drilling …
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Geophysical technologies for detecting underground …
An overview of the capabilities and limitations of various geophysical methods was followed by examples of geophys-ical techniques that could be used to detect mine …
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Methods of fault detection with geophysical data and surface geology
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.
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Resources | Free Full-Text | Applications of Geophysical Logs to Coal
Geophysical logs can be used not only for qualitative interpretation such as strata correlation but also for geotechnical assessment through quantitative data analysis. In an emerging digital mining age, such a use of geophysical logs helps to establish reliable geological and geotechnical models, which reduces safety and financial risks due to …
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Application of High Density Electrical Method in …
At present, the effective detection method for goaf water in coal mines is mainly the ground geophysical prospecting method. Based on many previous researches and practical examples (Zhang, 2012; Dzimunya. et al., 2018; Zhao, 2003; Qian, 2014), it's found that high-density electrical method is a rapid and economical method for …
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Application of Comprehensive Geophysical Prospecting Method in …
DOI: 10.1155/2019/2368402 Corpus ID: 202099420; Application of Comprehensive Geophysical Prospecting Method in the Exploration of Coal Mined-Out Areas @article{Luo2019ApplicationOC, title={Application of Comprehensive Geophysical Prospecting Method in the Exploration of Coal Mined-Out Areas}, author={Xiao Luo …
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Study on the application of comprehensive geophysical …
As a primary geophysical method for the detection of the electrical structure of the earth ' s crust and mantle, magnetotelluric exploration has been widely adopted both in China and foreign ...
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Theory and application of magnetic and self-potential methods …
Magnetics and self-potential methods detect coal fires from magnetic and electrical characteristics, separately. They are complementary and thus can help overcome some of the challenges encountered by conventional coal fire detection methods. ... Self-potential is a non-invasive geophysical method that measures the natural potential of …
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A General Perspective on Geophysical Methods in Mineral …
A combination of two or more geophysical methods for a particular investigation will ensure a more accurate outcome/result than a data set from any single geophysical method. Data from each geophysical method, if interpreted by several available procedures/techniques, enhances the acceptability of interpretation due to the …
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Overview on the application of geophysics in coal mining
I review applications for geophysics in support of coal mining operations. I discuss techniques used for mapping coal seams and geotechnical characterisation. …
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Using the integrated geophysical methods detecting active …
DOI: 10.1016/J.JAPPGEO.2017.01.030 Corpus ID: 133373124; Using the integrated geophysical methods detecting active faults: A case study in Beijing, China @article{Wang2017UsingTI, title={Using the integrated geophysical methods detecting active faults: A case study in Beijing, China}, author={Zhihui Wang and Xiangmin Cai …
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SURFACE GEOPHYSICAL METHODS FOR DETECTION …
SURFACE GEOPHYSICAL METHODS FOR DETECTION ... 1000 feet and it is difficult and expensive to characterize a coal seam with borings. The method has also been successfully applied to the mapping of ...
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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND …
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 …
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Quantitative Prediction of Water Volumes Within a Coal …
Mine water and mine inflow water are closely linked to the risk of mine water disasters. The relationships between various geophysical parameters and the volume of water in mine tunnels were considered by using an integrated suite of appropriate geophysical methods [i.e. direct current (DC) resistivity, transient electromagnetic …
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Application of Comprehensive Geophysical Prospecting …
The distribution of mined-out areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method …
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A Review of Geophysical Exploration Technology for Mine
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, …
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Development of a ground penetrating radar system for …
Introduction. Coal is the pillar of China's energy industry, and >60% of the energy is from coal at present. The geological conditions of the China's coal mining are complex, and the different kinds of hidden disasters, such as mine water, small faults, broken zones, are the main causes of the coal mine accidents in China (Cheng, Fei, …
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Application of Comprehensive Geophysical Prospecting …
The research results show that the high density resistivity method, transient electromagnetic method, microtremor detection and other comprehensive …
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Geophysical Methods, Exploration Geophysics
Geophysics is a branch of Earth science that utilizes principles and techniques from physics to study the physical properties and processes of the Earth. It involves the application of various methods to investigate the subsurface structure, composition, and dynamics. Geophysical methods are essential tools for …
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Application of controlled-source audio-frequency …
expressways, active coal mines, and villages; hence, power and high-voltage lines are present in the vicinity, and elec-tromagnetic interference is extremely strong. In this study, we address the question: which geophysical method can be used to detect old goaf in the Fangzi coal mine? After selecting the best goaf detection method, we conducted a
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Exploration geophysics
Electric-resistance methods such as induced polarization methods can be useful for directly detecting sulfide bodies, coal and resistive rocks such as salt and carbonates. The data collected from every source is processed and bring into intelligence for further analysis. This helps in rig monitoring and prescriptive analysis.
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Remote Sensing | Free Full-Text | Underground …
The common identification methods of coal fire areas include the census method, geophysical method, and remote sensing method [4,8]. The first two methods require workers to carry equipment …
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A novel detection method of mining subsidence area based …
The borehole geophysical method has a high detection accuracy for an abnormal body under a mine owing to its downhole measurement, ... Jiang BC, Cheng JY, Li P, Fan T (2023) Using BHR to detect coal seam interface in coal mine. J Appl Geophys 209:104894. Article Google Scholar Johanna O, Norbert K, Florian MW (2022) Mitigation …
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Detection of abandoned underground coal mines by geophysical methods …
This project attacks the problem through field studies of the following geophysical methods: electrical resistivity, self-potential, infrared radiometry, total field and differential magnetometry, seismic refraction and reflection, very low frequency electromagnetic and induced polarization over well-documented, drift, coal mines.
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Overview on the application of geophysics in coal mining
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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Seismic methods in mineral exploration and mine planning
Seismic methods are increasingly used by this industry for a wide range of commodities including base metals, uranium, diamonds, and precious metals. ... (Flin Flon mining camp, Canada). The authors demonstrate that the ability to detect a clear signature of the massive sulfide ore deposits is dependent on the mineralization type (pyrite versus ...
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Geophysics of Coal
This chapter gives a simple outline of the basic physical properties of coal-bearing sequences together with an outline of the field methods used to locate and …