المنتجات الساخنة
Prediction of Fractures in Coal Seams with Multi
网页2019年4月24日To ensure coal mining safety, high-accuracy three-dimensional seismic technology can be applied to determine the distribution of the coal seam and extract information on fracture development 21
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Case study of seismic hazard assessment in underground
网页2015年9月1日In coal mines, the occurrence of seismic hazards, e.g. rock burst, strong tremor, is closely related to the underground in situ and mining stresses. Above results
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Monitoring Velocity Changes Caused By Underground
网页2016年1月14日We discover seismic velocity changes during underground coal mining using passive seismic interferometry with two seismometers. The multicomponent
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Application of seismic velocity tomography in
网页2014年10月1日The Yuejin coal mine, owned and operated by Yima Coal Group Company, is located in the west of Henan Province, China. Currently, mining activity at
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Seismic Velocities of Rocks and Various Materials
网页20 行Coal. 2200 2700. 1000 1400. Salt. 4500 5500. 2500 3100. Anhydrites. 4000 5500. 2200 3100. Limestones. 3500 6000. 2000 3300. Dolomites. 3500 6500.
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Five largest coal mines in Mexico in 2020 Mining Technology
网页2021年9月16日Here are the five largest coal mines by production in Mexico, according to GlobalData’s mining database. 1. Micare Mine. The Micare Mine is a surface and
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Geophysical and analytical determination of overstressed
网页2021年2月20日A longwall panel in the coal seam 501 at a depth of ca.700 m in one of the hard coal mines operating in the Upper Silesian Coal Basin was a subject of the
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Graduate Thesis Library Department of Geophysics
网页Model analysis of seismic guided waves in coal seams: Presgrave: Bruce W. MS: 1979: The seismicity of Colorado: An estimate of seismic hazard derived from instrumental
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The role of seismic surveying in coal mining exploration
网页1984年8月1日The use of both high resolution surface seismic reflection surveys and in-seam seismic techniques in the exploration of coal is described in this . In the
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Comprehensive use of the Gutenberg–Richter law and Springer
网页2023年1月19日Cai W, Dou L, Gong S (2015) Quantitative analysis of seismic velocity tomography in rock burst hazard assessment. Nat Hazards 75:2453–2465. Article Google Scholar Chen T, Wang X, Mukerji T (2015) In situ identification of high vertical stress areas in an underground coal mine panel using seismic refraction tomography.
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Monitoring geological storage of CO2 using a new rock physics
网页2022年1月7日To mitigate the global warming crisis, one of the effective ways is to capture CO2 at an emitting source and inject it underground in saline aquifers, depleted oil and gas reservoirs, or in coal beds.
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Evaluation of the rockburst potential in longwall coal mining
网页Rockburst is a typical dynamic disaster in underground coal mines which its occurrences relate to the mechanical quality of coal seam and surrounding rock mass and also the condition of stress distribution. The main aim of this stone is to study the potential of rockburst in a longwall coal mine by using of passive seismic velocity tomography
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Time-lapse Passive Seismic Velocity Tomography of Longwall Coal Mines
网页2012年6月24日ABSTRACT:. Bumps in underground coal mines are violent events that result from a buildup of stress, usually in mines underlain and overlain by massive strata. Seismic velocity tomography can be implemented to infer stress distribution at mines and determine when a dangerous situation is developing. Three different methods were
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Geophysical investigations for stability and safety mitigation of
网页2021年2月15日Coal mining activities began in this area about 300 years back in a random manner and standard coal mining practices such as board and pillar were adopted during the late 19th century (SrivastavaMitra 1995; Lahiri-Dutt 2003). The sizes of the panel and coal pillar vary around 200 m, and between 20 and 24 m, respectively.
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Case study of seismic hazard assessment in underground coal mining
网页2015年9月1日The relation between applied stress and wave velocity is examined firstly at the laboratory-scale by using ultrasonic technique. Subsequently, an island longwall face under hard-thick strata, suffering from the threat of seismic hazards, e.g. rock burst, strong tremor, was chosen for a case study of passive velocity tomography.Based on
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Five largest coal mines in Mexico in 2020 Mining Technology
网页2021年9月16日Here are the five largest coal mines by production in Mexico, according to GlobalData’s mining database. 1. Micare Mine. The Micare Mine is a surface and underground mine located in Coahuila. It is owned by Altos Hornos de Mexico SAB de CV and produced an estimated 4.756 MTPA of coal in 2020. 2.
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Mexico and coal Global Energy Monitor
网页32 Mexico coal mines shut down for safety violations. It was reported on August 10, 2012 that 32 small coal mines in the northern state of Coahuila were closed due to safety concerns. The action was prompted by a number of accidents in the preceding month in the region that took the lives of 13 miners.
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Application of seismic velocity tomography in underground coal mines
网页2014年10月1日Request PDF On Oct 1, 2014, Wu Cai and others published Application of seismic velocity tomography in underground coal mines: A case study of Yima mining area, Henan, China Find, read and cite
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(PDF) New time-lapse seismic tomographic scheme based on
网页2018年10月3日Time-lapse passive seismic velocity tomography of longwall coal mines: A comparion of methods, 46th US Rock Mechanics/Geomechanics Symposium. Young, R. P.,Maxwell, S. C. (1992).
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Monitoring Velocity Changes Caused By Underground Coal Mining
网页Monitoring Velocity Changes Caused By Underground Coal Mining Using Seismic Noise RAFAł CZARNY, 1 HENRYK MARCAK,1 NORI NAKATA,2 ZENON PILECKI,1 and ZBIGNIEW ISAKOW 3 Abstract—We use passive seismic interferometry to monitor temporal variations of seismic wave velocities at the area of underground coal mining
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Prediction of Fractures in Coal Seams with Multi-component Seismic
网页2019年4月24日With multi-component seismic data, Brodic et al. predicted fracture systems by mode-conversions 28. With the increase in the depth of coal mines, P-wave exploration alone is likely to produce
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Coal mine microseismic velocity model inversion based on first
网页2018年12月28日The formation velocity is an important factor affecting the precise location of microseismic source. The establishment of elastic wave velocity model in the monitoring area to satisfy the requirements for precise location of seismic source has been a technical problem for the mine microseismic monitoring. Based on the assumption of
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Dispersive seismic waves in a coal seam around the roadway in
网页2021年12月1日Group velocity dispersion curves can be obtained using the multiple filtering techniques. 52, 53 We measure group velocity changes for seismic trace recorded 40 m away from the source, It was carried out in the Rydułtowy coal mine in Poland. One seismic profile was set in the roadway III-1200-E1 in the 713/1–2 coal seam (Fig. 7a).
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Feasibility of CDP seismic reflection to image structures in a 220
网页in a 220-m deep, 3-m thick coal zone near Palau, Coahuila, Mexico Richard D. Miller*, Victor Saenz*, and Robert J. Huggins** ABSTRACT The common-depth-point (CDP) seismic-reflection method was used to delineate subsurface structure in a 3-m thick, 220-m deep coal zone in the Palau area of Coahuila, Mexico.
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Application of seismic velocity tomography in underground coal mines
网页2014年10月1日1. Introduction1.1. Problem. With the development of the mechanized longwall mining method, underground coal mining has been improved both from production and productivity point of views (Hosseini et al., 2012b, Hosseini et al., 2013).However, there are still certain risks and hidden structure defaults during mining
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1 Introduction to seismic data and processing
网页1 Introduction to seismic data and processing Chapter contents 1.1 Seismic data and their acquisition, processing, and interpretation 1.2 Sampled time series, sampling rate, and aliasing 1.3 Seismic amplitude and gain control 1.4 Phase and Hilbert transforms 1.5 Data format and quality control (QC) 1.6 Summary Further reading
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Microseismic Monitoring of Underground Coal Mines:
网页the underground coal mine environment [Arabasz et al, 1997; Hatherly et al, 1997; Minney et al, 1997; Hayes, 2000]. Underground coalmines are different to underground hard rock mines sources with an adequate seismic velocity model. The geophones are permanently grouted
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Case Study of Passive Seismic Velocity Tomography in Rock
网页2016年6月20日Seismic velocity tomography has been widely used to infer high stress distributions in underground coal mines. For instance, Hosseini et al. ( 2012,2013 ) used passive seismic velocity tomography to evince the stress state around a longwall mining panel, found that high-velocity regions matched regions under high-abutment stress,
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Quantitative analysis of seismic velocity
网页2014年9月23日2.1 Seismic velocity tomography. Using the artificially created or mining-induced sources and geophones mounted on the surface or underground, the seismic velocity V(x, y, z) distribution can be
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