that US longwall mines utilize. The ANN network selected no degasification, GVB, horizontal and GVB, and horizontal, vertical and GVB options with high accuracy. The results suggest that the model can be used as a decision tool for degasification system selection using site- and mine-specific conditions.
Chat Online
Jan 01, 2009 · Degasifcation system selection for US longwall mines using an expert classifcation system Published Date: 1/1/2009. Language: English ... The results suggest that the model can be used as a decision tool for degasification system selection using site- and mine-specific conditions. Such a model can also be used as a screening tool to decide ...
Chat Online
The ANN was trained using different geographical locations, longwall operation parameters, and coalbed characteristics as input and was tested to classify the output into four different selections, which are actual degasification designs that US longwall mines utilize.
Chat Online
Karacan (2008a Karacan ( , 2009 used artificial neural networks to model ventilation methane emissions from longwall mines and to select a proper
Chat Online
Mar 01, 2009 · During longwall mining, methane emissions can originate from the unmined coalbed adjacent to the development entries (ribs) surrounding the ventilation system (), from the active longwall face and mined coal on the conveyor belts, and from subsided strata (Mucho et al., 2000).Emissions from the face are a combination of the methane emitted from the fresh
Chat Online
Mar 01, 2009 · Degasification system selection for US longwall mines using an expert classification system Özgen Karacan, C. Abstract. Methane emissions from the active face areas and from the fractured formations overlying the mined coalbed can affect safety and productivity in longwall mines. Since ventilation alone may not be sufficient to control the ...
Chat Online
Degasification system selection for US longwall mines using an expert classification system. Authors Karacan CÖ Source ... The results suggest that the model can be used as a decision tool for degasification system selection using site- and mine-specific conditions. Such a model can also be used as a screening tool to decide which ...
Chat Online
Degasi?cation system selection for US longwall mines using an expert classi?cation system . By . Abstract. Methane emissions from the active face areas and from the fractured formations overlying the mined coalbed can affect safety and productivity in longwall mines. Since ventilation alone may not be sufficient to control the methane levels on ...
Chat Online
Mar 01, 2012 · Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System 3/1/2009 - Peer reviewed journal articles This study describes the development of an expert classification system used as a decision tool which can be used for degasification system selection using site- and mine-specific conditions.
Chat Online
Dec 31, 1993 · Geotechnical surveys were conducted at 44 US longwall mines, and underground observations of site geology, entry conditions, and support design were recorded at each mine. The observations were combined with discussions with mine personnel to identify 69 longwall gate entry designs as satisfactory, unsatisfactory, or borderline.
Chat Online
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System; Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams; Field Study of Longwall Coal Mine Ventilation and Bleeder Performance
Chat Online
Coal Mine Bumps: Five Case Studies in the Eastern United States Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System Development and Application of Reservoir Models for the Evaluation and
Chat Online
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System; Forecasting Gob Gas Venthole Production Performances Using Intelligent Computing Methods for Optimum Methane Control in Longwall Coal Mines; Historical Development of Technologies for Controlling Methane in Underground Coal Mines
Chat Online
C. Özgen Karacan: Degasification system selection for US longwall mines using an expert classification system. (2009) journals/gandc/Karacan09 10.1016/j.cageo.2008.02.029 Q23910710 Degasification system selection for US longwall mines using an expert classification system. 1 515-526 Comput. Geosci. Comput. Geosci. 35 3 2009 provenance
Chat Online
Jul 14, 2016 · The selection of a mining method is one of the most important decisions made by mining engineers. An appropriate fully mechanized mining method is of great importance to mining design and capacity planning for thin coal seams. Therefore, the comprehensive evaluation of alternative mining methods is an important part of mining design. Several
Chat OnlineModeling and prediction of ventilation methane emissions of U.S. longwall mines using supervised artificial neural networks C. Özgen Karacan National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, Pittsburgh, PA, 15236, United States
Chat Online
These projects are likely to encourage the use of longwall mining to extract other thick or steeply pitching coal seams in the area. Longwall systems are also scheduled to be implemented at two mines with Federal re-serves in the Hanna basin of southern Wyo-ming. In 1981 a longwall system will be in-troduced at Carbon No. 1 Mine. This system
Chat Online
May 30, 2018 · The U.S. Bureau of Mines, in an effort to improve long- wall planning, is investigating multiple-seam longwall design and systems development. Significant advances have been made in longwall design for single seams in the areas of gate road pillar design, panel layout, powered support selection, and roof control.
Chat Online
Degasification system selection for US longwall mines using an expert classification system ... The results suggest that the model can be used as a decision tool for degasification system ...
Chat Online
commonly in underground mines, including classification of underground mining methods and brief explanations of the techniques of room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, and block caving. The second section describes underground mining equipment, with particular focus on excavation
Chat Online
Nov 18, 2019 · In the past 13 years since the publication of Longwall Mining, 2 nd edition in 2006, although there have been no major changes in longwall mining technology and operations, many incremental developments in the whole system as well as various subsystems of the existing longwall mining operational technologies as detailed in the 2 nd edition have
Chat OnlineFeb 25, 2021 · The absolute three-dimensional position of a longwall shearer is fundamental to longwall mining automation. The positioning of the longwall shearer is usually realized by the inertial navigation system (INS) and odometer (OD). However, the position accuracy of this positioning approach gradually decreases over time due to the gyro drift. To further increase
Chat Online
Systems and methods are described for monitoring a condition of a mine roof using a longwall mining system. A plurality of powered roof supports is controlled to apply an adjustable support pressure on a mine roof. A condition of the mine roof is monitored based on the adjustable support pressure applied to the roof by a respective actuator of each powered roof support.
Chat OnlineThese projects are likely to encourage the use of longwall mining to extract other thick or steeply pitching coal seams in the area. Longwall systems are also scheduled to be implemented at two mines with Federal re-serves in the Hanna basin of southern Wyo-ming. In 1981 a longwall system will be in-troduced at Carbon No. 1 Mine. This system
Chat OnlineNov 18, 2019 · In the past 13 years since the publication of Longwall Mining, 2 nd edition in 2006, although there have been no major changes in longwall mining technology and operations, many incremental developments in the whole system as well as various subsystems of the existing longwall mining operational technologies as detailed in the 2 nd edition have
Chat Online
Geotechnical surveys were conducted at 44 US longwall mines, and underground observations of site geology, entry conditions, and support design were recorded at each mine. The observations were combined with discussions with mine personnel to identify 69 longwall gate entry designs as satisfactory, unsatisfactory, or borderline.
Chat Online
Apr 06, 2010 · The mines own an extensive fleet of power distribution equipment at 12.47-KV. One option is to develop a hybrid power distribution system using 12.47-KV on belts, support equipment and continuous miner sections. Use the 21.6-KV exclusively for the longwall. This option was selected at West Elk and Sufco.
Chat Online
a state-of-the-art plow system. In 1989, US Steel’s Pinnacle mine became the world’s first automated longwall face, eliminating the need for an operator at the face. The mine used a complete Gleithobel plow system with full automation built by Westfalia Lünen (now a part of Caterpillar). The two plow longwall systems delivered to U.S. Steel
Chat Online
coal mining - coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam
Chat Online
Jan 27, 2021 · Designing a suitable support system is of great importance in longwall mining to ensure the safe and stable working conditions over the entire life of the mine. In high-speed mechanized longwall ...
Chat Online
Gilmore*, RC [2015]: Computational Fluid Dynamics Modeling of Underground Coal Longwall Gob Ventilation Systems Using a Developed Meshing Approach, PhD dissertation, Colorado School of Mines, May 2015, 280 p., co-advisor G. Bogin, Jr.
Chat Online
May 26, 2017 · Supports were connected to a reference rail which was then utilized to pull the 2 or 3 leg supports forward, in a similar manner to the use of an AFC to advance longwall supports. Shortwall faces could be installed between two gate roads as for a longwall face, but in some cases were mined to a blind end and ventilated by auxiliary fan (not ...
Chat Online
Gob ventilation boreholes (GVBs) are widely used in United States underground coal mines for longwall gob degasification purposes. GVBs can recover
Chat Online
Sep 01, 2011 · The degasification system selection module determines the safest way to degasify a longwall mine with given characteristics using proven techniques. Finally, MCP can predict the performance of gob gas ventholes and accurately determine the impacts of drilling/exhauster parameters, borehole location, and mining parameters on GGV performance.
Chat Online
Stanley R. Michalski, in Coal and Peat Fires: A Global Perspective, 2011 Longwall Coal Mining. The longwall-mining method is a continuous mining system that was developed for mining coal deposits uniform in thickness and slope or where the overburden pressures may crush support pillars or for improving productivity. This method relies on the complete extraction of
Chat Online
Aug 01, 2018 · The developed model allows for the exact selection of the best parameters and the estimation of the main indicators characterizing the production process carried out by the longwall complex. Modeling results can be used in the production planning process in mining and at the same time can contribute to maximize its efficiency.
Chat Online
