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Mining safety of longwall topcoal caving in China
The Department of Energy s Office of Scientific and Technical Information
A COAL MINE CAVING IN. The New York Times
Aug 8 1883WILKESBARRE Penn. Aug. 7.A serious cavein took place at the Pine Ridge mine of the Delaware and Hudson Company early this morning. View Full Article in Timesmachine »
Development of 3D top coal caving angle model for fully mechanized
Sep 1 2022The 3D top coal caving angle model was developed based on the onsite measurement data. ABC and PQR represent the roof and top coal caving face of a fully mechanized caving face respectively (Fig. 5a). To calculate the top coal caving angle effectively an OXYZ 3D coordinate system was established with point O as the origin where the XOY coordinate plane was parallel to the ABC plane and
Ground response mechanism of entries and control methods induced by
7 days agoThe average burial depth of the 150202 mining panel is 300 m. The thickness of the 15# coal seam is m with an average thickness of m and the dip angle is 6°8°. The LTCC mining method was adopted for the 150201 and 150202 mining panels with a mining height of m and top coal caving height of m.
longwall equipment in Bangladesh
· The longwall was a China National Coal Mining Equipment (CME) top caving face 240 metres wide and with a 2km panel length. The operation is a 365 days 24/7 operation. The mine which features two top coal caving faces and which has been operating since January 2005 has planned utilisation to keep the output conveyor belt full. contact us
Recognition of rockcoal interface in top coal caving Extrica
This paper provides a novel rockcoal interface recognition method based on stacked sparse autoencoders (SSAE). Given their different size and hardness coal and rock generate different tail beam vibrations. Therefore the rockcoal interface in top coal caving can be identified using an acceleration sensor to measure such vibrations. The end of the hydraulic support beam is an ideal location
Dynamic response of a coal rock caving impact tail beam for Nature
Jul 7 2022To accurately analyze the dynamic response signal after the coal rock impacts the tail beam a DEMMFBD twoway coupling system of discrete element bonding broken coal and top coal caving support
CNA Caving coal control method device electronic equipment
The invention provides a top coal caving control method a top coal caving control device electronic equipment and a computer readable storage medium which relate to the technical field of coal mining wherein the method comprises the steps of determining coal caving times and coal caving duration corresponding to each coal caving operation based on preselected coal caving parameters and a
Longwall Top Coal Caving (LTCC) technology Yancoal
Developed in China top coal caving uses a modified long wall mining system. LTCC allows the excavation of thick coal seams of 5 to 12 metres at one pass of the longwall machine generating high productivity and economic returns for an operation. and Austar s longwall equipment was manufactured under license by a German company (DBT).
Key technologies and equipment for a fully mechanized topcoal caving
Key technologies and equipment for a fully mechanized topcoal caving operation with a large mining height at ultrathick coal seams Jinhua Wang1 • Bin Yu2 • Hongpu Kang1 • Guofa Wang1 • Debing Mao1 • Yuntao Liang3 • Pengfei Jiang1 Received 20 February 2015/Revised 15 March 2015/Accepted 18 March 2015/Published online 21 July 2015
Study of automated topcoal caving in extrathick coal seams using the
International Journal of Rock Mechanics and Mining Sciences. Volume 122 October 2019 104033 October 2019 104033
Key Technology of Complete Equipment for FullyMechanized Top Coal
The recoverable reserves in thick and extrathick coal seams accounts for about 43 of the total recoverable coal reserves in fullymechanized method with coal caving for large mining height is the development direction of extrathick coal seam mining technology which has characteristics of high production high mechanization high efficiency and low energy consumption and
longwall top coal caving equipment Products
longwall top coal caving equipment. 250tph river stone crushing line in Chile. 200tph granite crushing line in Cameroon. 250tph limestone crushing line in Kenya. 250tph granite crushing line in South Africa. MCC 120tph granite crushing line in Zimbabwe. 400tph crushing plant in Guinea.
Fullymechanization Mining Underground Mining Coal Mining
The study and application of manless fullymechanized coal mining technology and equipment which used for the thickness of coal seam from to Situation of working face 1 Number of coal mine 2# 2 Thickness of coal seam 3 Hardness of coal ore f≈ . 4 Dip angle of coal seam 35° 5 Length of working face 235m
COAL MINES CAVING IN. The New York Times
Apr 26 1884COAL MINES CAVING IN. Send any friend a story. WILKESBARRE Penn. April 25.The surface over the Fuller Coal Company s mine near Maltby settled last night and a large body of water at
Applied Sciences Free FullText Dome Roof Fall Geohazards of Full
The roof fall hazard is more likely to take place within chamber with ultralarge section which would not only damage mechanical equipment but also cause casualties. In this paper the strap joint chamber of the Tashan coal mine is studied and finite and discrete element method (FDEM) is used to establish the numerical model of the roof fall of the chamber dome. The simulation results show
8 Application and benefits Key technologies and equipment for a fully
The technologies and equipment developed have effectively increased the coalface produc tion rate and topcoal recovery. The large mining height shockresistance topcoal caving hydraulic support and the electrohydraulic control technology developed for topcoal caving greatly improved topcoal caving and discharge speed reduced labor
Long wall top coal caving SlideShare
2. LONGWALL TOP COAL CAVING GENERAL INFORMATION • It is the modified method of longwall mining system • Yancoal introduced the Longwall Top Coal Caving (LTCC) mining technology in Australia at its Austar mine in 2006. • This method has been developed in china in more recent years and is used there quite extensively and successfully.
Filling mining method for fullymechanized top coal caving working face
Apr 17 2021Provided is a filling mining method for a fullymechanized top coal caving working face which relates to the field of mining engineering technologies. The method solves the technical problems of roof control of the fullymechanized top coal caving working face and a large ground deformation of top coal caving mining. The method includes the
Key technologies and equipment for a fully mechanized topcoal caving
Thick and ultrathick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines which accounts for 44 of the total minable coal reserve. A fully mechanized topcoal caving mining method is a main underground coal extraction method for ultrathick coal seams. The coal extraction technologies for coal seams less than 14 m thick were extensively used in
Caving Coal Hydraulic Support for sale
Hydraulic support for sale Quality Caving Coal Hydraulic Support on sale of Jin Yu Material Supplying And Marketing Co. Ltd. from China.
Prevention and Control of Hydrogen Sulphide Accidents in Mining
Especially at the 575 level the top coal caving thickness was more than 20 m and the amount of hydrogen sulphide outflow at the borehole exceeds 700 times of the standard of ppm specified in Coal Mine Safety Regulation 70 times of the standard at the coal cutting site 140 times of the standard at the upper corner and 30 times of the
Application of Longwall Top Coal Caving in Challenging Avestia
AbstractLongwall top coal caving (LTCC) techniques has been employed in favourable geological conditions widely in China since the mid80s and in Australia recently. With the improvement of highlypowered face equipment and the method itself in the past 15 years LTCC was introduced to more challenging geological
Electromagnetic wave forward modeling of coalgangue mixed model in top
TodayThe automatic control of top coal caving is of great significance to realize intelligent coal mining. In the process of top coal caving a coalgangue mixed area containing coal gangue and air is formed at the tail beam of the hydraulic support which has different electromagnetic parameters different volumes and different shapes. To explore the transmission characteristics of
Top Coal Caving Roof Support Beijing China
The top coal is now drawn by the top coal caving mechanism on the shield beam. As our patented product this equipment has a high degree of automation high coal production volume of single coalface and high supporting strength which is suitable for thick and ultrathick coal seams. Standard Compliant MT MT/
Top Coal Caving Longwall underground COAL
equipment for a Longwall Top Coal Caving face. Photo courtesy of Joy Manufacturing Company Pty Ltd. A brief description of longwall top coal caving (LTCC) is included at the end of the Longwall section of the Fundamentals of Coal Mining module of this web site. Despite the fact that there are numerous coal seams in Australia which are thick
CNU Light support top coal caving working face lower end
Light support top coal caving working face lower end support equipment belongs to the technical field of mine support equipment and is used for the lower end support of an underground light support top coal caving working face. The technical scheme is characterized in that the lower end support equipment comprises four support pillars top beams two passing top platforms and two passing
Top coal caving longwall maximizes thick seam recovery
The Department of Energy s Office of Scientific and Technical Information
Open Access proceedings Journal of Physics Conference series
Gaohe coal minethe title of your paper here Fei Ji and Zhanjin LuHydraulic fracturing of hard top coal and roof for controlling gas during the initial mining stages in longwall top coal caving a case study Bingxiang Huang Qingying Cheng Xinglong Zhao et al.This content was downloaded from IP address on 23/11/2022 at 17 57
CNA Method system and device for controlling top coal
The invention provides a top coal caving control method a system a device and electronic equipment which relate to the technical field of automatic coal mining and comprise the following steps acquiring target caving coal parameters processing the target caving coal parameters by using a caving coal control parameter prediction model to obtain target control parameters of the target
Research on the Height of the WaterConducting Fracture Zone in Fully
Downloadable In order to study the development height of the waterconducting fracture zone in a fully mechanized top coal caving face. The E2311 working face of Gaohe Coal Mine was chosen as the research object and the combinedstrata structure and the rock layer synergistic movement mechanism were determined by combining engineering geological investigation and theoretical analysis.
Electromagnetic wave forward modeling of coalgangue mixed model in top
The automatic control of top coal caving is of great significance to realize intelligent coal mining. In the process of top coal caving a coalgangue mixed area containing coal gangue and air is formed at the tail beam of the hydraulic support which has different electromagnetic parameters different volumes and different shapes.
Sme Mining Engineering Handbook 2 Second Edition
Health and Safety ManagementSME (Society of Mining Engineers) Mining Engineering Handbook Mine Planning and Equipment SelectionThe Surveying HandbookMining Haul RoadsSurface Subsidence EngineeringControlling Exposure to Diesel Emissions in Underground MinesSME Mining