Relationships between coal-quality and organic-geochemical parameters: A case study of the Hafik coal deposits (Sivas Basin, Turkey)

2010 ◽  
Vol 83 (4) ◽  
pp. 396-414 ◽  
Author(s):  
N. Yalçın Erik ◽  
S. Sancar
Keyword(s):  
Coal Quality ◽  
Geochemical Parameters ◽  
Sivas Basin ◽  
Coal Deposits

scholarly journals Remnant Coal Detection System

Resources ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 45
Author(s):  
Chad Hargrave ◽  
Paul McPhee
Keyword(s):  
Historical Data ◽  
Detection System ◽  
Short Interval ◽  
Successful Implementation ◽  
Safety Planning ◽  
Production Environment ◽  
Coal Deposits ◽  
Reliable Detection ◽  
Existing Data

This paper describes the development and successful implementation of a system designed to detect coal deposits remaining in coal train wagons after unloading (dumping). These undesirable coal deposits constitute both small residual amounts of “carryback”, but also larger “hang-ups” of significant volume that have failed to discharge. The system was originally developed simply to detect and record volumes of carryback, as part of an effort to characterise the extent of the problem for the coal transport industry, but was then enhanced to provide real-time feedback of large hang-ups so that they could be discharged prior to the wagons exiting the dump station. The paper describes the hardware and processing systems used in the system, including the different strategies employed to ensure a reliable detection system. The system has now been installed and operated in a production environment at three dump stations across two different coal terminals, and a case study of the results from one of these dump stations is presented. Automating remnant coal detection at dump stations provides short interval control to minimise potential hazards and downtime, and historical data that may be integrated into existing data platforms and analysed for productivity, environmental, and safety planning insights.

scholarly journals Rockburst hazard assessment based on seismic tomography and analytical modelling - a case study

2018 ◽  
Vol 66 ◽  
pp. 01009
Author(s):  
Dariusz Chlebowski ◽  
Zbigniew Burtan
Keyword(s):  
Hazard Assessment ◽  
Seismic Tomography ◽  
Vertical Component ◽  
Rockburst Hazard ◽  
Expert Opinions ◽  
Deformable Media ◽  
Coal Deposits ◽  
Threat Level ◽  
Survey Results

In accordance with the formal regulations currently in force in Poland, the criteria for rockburst hazard assessment with respect to coal deposits include the records of seismic events and their impacts, de-stressing of the entire seam or its parts and expert opinions of mine operation engineers. Effectiveness of the de-stressing can be verified by geophysical test data whilst the expert opinions are mostly based on mathematical modelling using specialist software or dedicated simulation algorithms. This study collates and synthesises the results of tests carried out in a seam section in a colliery within the Upper Silesia Coal Basin, obtained by the outlined methods. Geophysical survey results are interpreted basing on seismic tomography procedures utilising the geo-tomography techniques for velocity field reconstruction in data processing. For comparison, the stress state modelling data are provided, based on conventional engineering solutions applicable to mechanics of deformable media. The actual assessment of the rockburst threat level is based on observations of distributions of the longitudinal wave velocity in relation to the actual value of the vertical component of stress concentration within the coal seam.

scholarly journals METHODS FOR PRICE DETERMINATION (JUSTIFICATION) AT ECONOMIC-GEOLOGICAL EVALUATION OF COAL DEPOSITS

2018 ◽  
pp. 45-48 ◽  
Author(s):  
G. I. Rudko ◽  
M. M. Kurylo ◽  
V. V. Bala ◽  
Yu. S. Makovskyi
Keyword(s):  
Stock Exchange ◽  
Economic Assessment ◽  
Futures Contracts ◽  
Coal Quality ◽  
Coal Price ◽  
Coal Deposits ◽  
Transfer Prices ◽  
Producer Prices ◽  
Detailed Assessment

The purpose of research is systematization and analysis of methods of price determining for geological and economic assessment of coal deposits in domestic and international practice. Price indicators and income from sale of coal affect significantly reserves value, profitability of their development, and determine industrial significance of reserves. In domestic practice commodity exchanges, contractual, regulated, world and transfer prices are used. In international practice coal prices are formed at the result of futures, spot or stock exchange contracts. Now international coal trade realizes in the framework of futures contracts and spot transactions. In recent years, short-term contracts prevail, rarely it’s used medium-term contracts. A sequence of coal pricing for geological and economic assessment has been determined, which is the following: classification of coal by grades and classes in accordance with current standards; statistical analysis of prices by grades and classes, coal enrichment products; determination of a system of discounts/surcharges to the price of each class depending on coal quality; correction of actual producer prices for assessment reserves. The values of surcharges or discounts for individual indicators of coal quality are determined. The sensitivity analysis of reserves value and profitability from changes in selling coal prices has been carried out. The determination of the coal price or enrichment products requires a detailed justification depending on the stage of geological and feasibility study of reserves. For detailed assessment of explored or exploited deposits it is reasonable to use actual prices of coal sales for the previous period and contract prices for future periods in the presence of medium and long-term contracts. For preliminary geological and economic assessment, it is possible to use the price of the analogue deposit, which is developed, or wholesale coal prices with correction by quality.

scholarly journals 3D modeling from outcrop data in a salt tectonic context: Example from the Inceyol minibasin, Sivas Basin, Turkey

2016 ◽  
Vol 4 (3) ◽  
pp. SM17-SM31 ◽  
Author(s):  
Pauline Collon ◽  
Alexandre Pichat ◽  
Charlie Kergaravat ◽  
Arnaud Botella ◽  
Guillaume Caumon ◽  
...  
Keyword(s):  
3D Modeling ◽  
Surface Patch ◽  
Salt Tectonics ◽  
Reference Case ◽  
Sivas Basin ◽  
Implicit Approach ◽  
Mesh Improvement ◽  
Modeling Strategy ◽  
Tectonic Features

We have developed a 3D modeling strategy of the encased minibasin of Inceyol in Sivas (Turkey). The challenge lies in the combination of sparse outcrop data and the complex interpretive geometry of geologic structures that come from salt tectonics. We have succeeded in modeling the convoluted salt surface using an explicit indirect surface patch construction method followed by a manual mesh improvement. Then, we modeled the minibasin sediments with an implicit approach. The result highlighted the remarkable geometry of the convoluted salt horizon and its associated minibasin by extending in 3D the geologist’s interpretive 2D sections. This case study proved that building complex geometries is feasible with the existing tools and a good expertise in the various geomodeling techniques. Our work also underlined the need for new methods to ease the modeling of such tectonic features from sparse data. We have developed a 3D view of the model thanks to WebGL technology, as well as downloadable data to constitute a reference case study.

Secondary migration of petroleum along syncline axes: a case study of the southern Kuqa Foreland Basin

2017 ◽  
Vol 54 (7) ◽  
pp. 720-730
Author(s):  
Jun Cai ◽  
Xiuxiang Lü ◽  
Ping Wang
Keyword(s):  
Foreland Basin ◽  
Data Interpretation ◽  
Petroleum Exploration ◽  
Integrated Analysis ◽  
Production Data ◽  
Secondary Migration ◽  
Geochemical Parameters ◽  
Kuqa Foreland Basin ◽  
Migration Pathways

Tracing petroleum migration pathways for petroleum exploration in a sedimentary basin is challenging. Paleo-uplifts are generally considered to represent the primary migration directions of petroleum. Here we propose a model for the Kuqa Foreland Basin, in which petroleum migrates along the axes of synclines between paleo-uplifts, based on an integrated analysis of seismic, geochemical, and production data. Interpretation of detailed seismic data indicates that petroleum is unlikely to migrate to the paleo-uplifts because of their relatively low positions, fault disruptions, or a lack of Mesozoic reservoirs. Geochemical parameters, including the ratios of alkyl dibenzothiophenes and the gas wetness parameter, show that petroleum maturity gradually decreases along the axes of synclines between paleo-uplifts from northeast to southwest. Petroleum production data and gas/oil ratios also show decreasing trends from northeast to southwest. This evidence suggests that petroleum is likely to migrate along the axes of the synclines between the paleo-uplifts from northeast to southwest. This study not only enhances the scientific understanding of secondary migration, but also may be useful to guide petroleum exploration in the southern Kuqa Foreland Basin.

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