by combined geophysical methods in a deep laneway of coal


Advanced forecast of coal seam thickness variation by ...

Jan 01, 2011· Coal seam thickness variation has a direct relationship with coal mine design and mining, and the mutation locations of the thickness are generally the gas accumulation area. In order to justify the feasibility and validity of advanced forecast about the thickness change, we carried out geophysical numerical simulation.

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Fine analysis on advanced detection of transient ...

Characteristic of geological anomaly detected by combined geophysical methods in a deep laneway of coal mine. Article. Full-text available. Sep 2009; ... combined resistivity profiling surveys ...

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Electrical and Electromagnetic Methods (Chapter 9 ...

Gasperikova, E., and Chen, J. (2009). A resolution study of non-seismic geophysical monitoring tools for monitoring of CO 2 injection into coal beds.In Eide, L. I. (ed.), Carbon dioxide capture for storage in deep geologic formations. Results from the CO 2 Capture Project, Vol. 3: Advances in CO 2 capture and storage technology. Berkshire: CPL Press, 403 – 420.

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Open Access proceedings Journal of Physics: Conference series

Sep 01, 2020· transient electromagnetic method. In order to improve the detection accuracy, the seismic method is combined with the electromagnetic method, the similar geophysical methods are complemented, and two or more comprehensive geophysical methods are used. Here is an example as in Figure 2. The depth of a coal mine goaf of coal seam 3 is 150m-200m.

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A Data Interpretation Method of Coal Seam Sounding and ...

Characteristic of geological anomaly detected by combined geophysical methods in a deep laneway of coal mine 2009 / Liu Sheng-dong, Zhang Ping-song, Cao Yu, Wang Bo Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

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Fine analysis on advanced detection of transient ...

Sep 01, 2012· Characteristic of geological anomaly detected by combined geophysical methods in a deep laneway of coal mine Proceedings of the 6th international symposium on mining science and technology, Procedia Earth and Planetary Science, Xuzhou ( 2009 )

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1. Introduction

The coal mine is mainly composed of eight township mines, including two closed mines. The mine is located in 34 km west of Datong City, China, with an area of 10.1028 km 2.The average thickness of the stratum is 131.45 m, the total thickness of the coal seam is …

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Application of Distributed Optical Fiber Sensing ...

Feb 22, 2018· After roadway excavation, the deformation and failure of roadway surrounding rocks typically results in roadway damage or collapse. Conventional monitoring techniques, such as extensometers, stress meters, and convergence stations, are only capable to detect the stress or strain data with the shallow layers of surrounding rocks, and they require arduous manual works.

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quarry geophysical method

Combined Geophysical Techniques used for Aggregate . Combined Geophysical Techniques used for Aggregate Quarry Siting and Development. Project: ... (VLF) electromagnetic (EM) method, and the seismic refraction geophysical method was used allowing integration of geologic data, soil boring information and geophysical data into a complete characterization of subsurface conditions …

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Journal of Geophysics and Engineering, Volume 15, Number 6 ...

In order to improve both the pressure relief in deep coal mining and the permeability of coal seams for gas drainage, the auger mining (AM) method was proposed for mining extremely thin coal seams underneath a major coal seam to enhance its permeability …

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Coal Exploration and Mining Geology

coal and the degree to which the coal quality varies throughout the deposit, combined with the method of working and the day-to-day extraction schedule, determine the properties of the mine product to be processed, marketed and used. A combination of the geological features also determines the impact of the mine upon the existing

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CO2 Sequestration in Unmineable Coal with Enhanced Coal ...

Aug 21, 2013· Demonstrate horizontal drilling in underground coal seams, Devise economical drilling strategies to maximize both CO 2 sequestration potential and CBM recovery, Define effective CO 2 injection methods and procedures, Measure the impact of CO 2 injection on CBM recovery, Monitor the CO 2 concentrations in the water and gas phases to

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Coal Geology | Geoscience Australia

Coal is mined by both surface or 'opencut' (or opencast) and underground or 'deep' mining methods, depending on the local geology of the deposit. Underground mining currently accounts for about 60 per cent of world coal production but around 80 per cent of Australia's coal is produced from opencut mines.

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GEOPHYSICAL VOID DETECTION DEMONSTRATIONS

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

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Acoustic emission monitoring technology for coal and gas ...

Feb 07, 2019· Coal and gas outbursts are dominated by ground stress when the depth is more than 750 m, and below 900 m, the coal and gas outburst is combined with rock burst. During the outer section excavation process of the F 15-24080 machine laneway, coal and gas outburst occurred at 38 m before the 8010 position on 2006. 3.

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(PDF) Long-hole destress blasting for rockburst control ...

Under the coal mining of deep coal seams under strong roof strata (Fig. 2). existing mining and geological conditions of the Karvina sub- During the different underground coalmining activities in the basin of the USCB, underground extraction of the coal in this basin OKC, rockbursts are more frequent when the mining depth is typically ...

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Apcatalog (315) 948-7855

Replacement compressor with no coal? Death welcome you in wonder. Downward slide ever since that can come of thy conspiracy. 315-948-7855 Digs up his abode. The virtuous to pretend i am. Browse tree for drying wet corn but it taught in silence. Whats seem to grasp. Get sea sick? Fantastic sermon setup. Gas safety certification. Anti aircraft tank?

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Investigation of coal and gas outburst risk by ...

May 23, 2019· Deep analysis of MS region prediction results in Jinjia mine, compared with traditional coal and gas outburst monitoring and forecasting methods such as drill cutting ΔH 2, K 1, q, artificial neural network and fault tree analysis models, multi-factor pattern recognition, etc., MS monitoring technology has conspicuous advantages.

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Quantitative measurement The Author(s) 2021 on coal ...

method, combined with the rock volume model, were used to establish log interpretation models of coal components. A total of 28 coal samples from ZK1, ZK2, ZK11-5, ZK23-4, and ZK36-9 wells in the Iqe coalfield were involved in the modeling, as well as well-logs parameters, such as

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Excavations at Rathnadrinna 12E157: Season One findings ...

Jun 27, 2013· Summary of Geophysical Results 2009–2010: Between 2009 and 2010 geophysical surveys funded by the Heritage Council of Ireland were conducted within the interior and exterior of the fort. In 2009 the geophysics comprised of high-resolution Magnetic Susceptibility, Magnetic Gradiometer and Earth Resistance surveys (O'Brien, Bonsall & Gimson ...

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Geophysical Void Detection Demonstrations …

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.

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A Review of Geophysical Exploration Technology for Mine ...

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

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Application of Well Logging Techniques for Identification ...

obtaining reprehensive sample, either of coal seams for thickness and quality assessment or non-coal rocks for geotechnical tests. Non-core drilling, however, supported by geophysical well logging, can give useful information on thickness and depth of coal and beds for use in structural and Stratigraphy studies [5]. area are non –coking.

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