and pillar coal mining ppt

CHAPTER 11 Mining Technology - Princeton University

cial mining technologies to extract Federal coal reserves from deep underground seams The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in the West: 1) room and pillar with contin-uous miners, and 2) longwall mining;...

Know More

PowerPoint Presentation

Acknowledgments Jeff Fields, Senior Engineer Jim Sublett, Senior Sourcing Specialist GAI Consultants, Project Designer Bob Turka, Senior Project Manager Mining History at the White River Mine Mined in the 1920s and 1930s using the room and pillar method No evidence of retreat or split pillar mining Mine was flooded To this day The pillars are mostly in place Sinkholes onsite indicate shallow ....

Know More

Bord & Pillar Method | Mining | Coal - Scribd

Bord & Pillar Method - Free download as Powerpoint Presentation (ppt), PDF File (pdf), Text File (txt) or view presentation slides online underground coal mining...

Know More

Room-and-pillar mining | coal mining | Britannica

Other articles where Room-and-pillar mining is discussed: mining: Room-and-pillar mining: The most common mining system is room-and-pillar In this system a series of parallel drifts are driven, with connections made between these drifts at regular intervals When the distance between connecting drifts is the same as that between the parallel drifts, then a,...

Know More

Hard-rock room and pillar - QueensMineDesignWiki

Room and pillar is an underground mining method that has applications to a wide variety of hard-rock deposits worldwide It is commonly classified as an open-stoping method, meaning that development involves mining out underground cavities while leaving the ,...

Know More

Bord and Pillar Coal Cutting Machine ~ Mining

22/1/2014· Coal cutting machine is used in bord and pillar mining method of underground coal mining to make Undercut, Overcut or Middlecut to provide free face for the blasting operation Development by CCM: The headings are Undercut, Overcut or Middle Cut by a coal cutting machine and shot holes are then drilled and charged with explosives and blasted...

Know More

Bord-and-pillar mining explained | Illawarra Mercury ,

Bord-and-pillar mining is used in first workings of a deposit, and when irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch...

Know More

Coal Mining Methods - Colorado School of Mines

Longwall mining is a very efficient coal producing technique Longwall productivity is potentially higher than that of room-and-pillar mining, because longwall mining is basically a continuous operation requiring fewer workers and allowing a high rate of production to be sustained The amount of coal recovered is also Fig 2: Room and Pillar Mining...

Know More

Room and Pillar Mining - YouTube

29/5/2011· Principles of Room & Pillar Mining - Duration: 2:59 Global Mining 127,426 views , The Principle of Longwall Top Coal Caving (LTCC) - Duration: 3:58 Global Mining ....

Know More

Longwall Mining Method and Design

Longwall mining of multiple seams has dominated European coal production for decad In the United Kingdom, the intent is to maximize the gob and to avoid leaving pillars between panels; leaving pillars between panels is known to create stress problems in subsequent workings both above and below...

Know More

Mining PowerPoint Templates and Google Slides Themes ,

Download Mining PowerPoint templates (ppt) and Google Slides themes to create awesome presentations Free + Easy to edit + Professional + Lots backgrounds...

Know More

Bord-and-pillar mining in inclined orebodies

tivity, cost implications, profit and mining flexibility and the most suitable layout was chosen Bord-and-pillar mining was then compared to conven-tional mining according to the following: financial analysis, dilution and flexibility Conclusions could now be drawn to the appropriateness of bord-and-pillar mining in Vlakpoort and Moddergat ....

Know More

Pillar design incoalmines - SAIMM

of bOld-and-pillar mining methods are widened to a coal-to-waste ratio of1:5and40percentlostcoal,then almost 63per cent ofthe country's coal reserves fall within thescopeofbord-and-pillar mining From theabove discussion itfollowsthat considerable benefit canbegained fromacritical examination ofthe principles underlying thedesign ofcoalpillars...

Know More

Mining - Safety Training PowerPoint Presentations

Anthracite Mining and Rescue Anthracite coal is mined mainly in eastern Pennsylvania The Pennsylvania anthracite mining region lies within an eight county area located in the northeastern part of the state It is estimated that anthracite coal is located in a 484 square mile area PPS: Coal Miners A nostalgic look at miners of old 8 slides...

Know More

Types of Underground Mining Method Comparison

In any discussion of Methods of Underground Mining Comparison, one is repeatedly confronted with the difficulty of dealing with so many variable conditions It is not an exact science and in the choice of a method each varying factor has a certain weight, which, in many cases, experience alone can determine...

Know More

Topic 9: Mining Methods Part V- Underground Mining

Underground Mining We will explore all of the above in Part 9 Choice of mining method Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal ,...

Know More

Coal mining - Choosing a mining method | Britannica

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 depends on many ,...

Know More

mining crusher and mill ppt - atelierdroitsocialbe

bord and pillar coal mining ppt grinding mill bord and pillar coal mining ppt grinding mill Search , CN crusher As one of the leader mining and construction equipment manufacturer in China, ....

Know More

The Duncan Method of Partial Pillar Extraction at Tasman Mine

K McTyer and T Sutherland, The Duncan Method of Partial Pillar Extraction at Tasman Mine, 11th Underground Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2011, 8-15...

Know More

166 Longwall Mining PPTs View free & download | PowerShow

US Underground Mining Equipment Industry to Provide USD 43211 Million Revenue Post 2016 - US Underground Mining Equipment Industry Information by Type of Mining (Longwall Extraction and Room & Pillar Extraction), by Application (Coal Mining, Metal Mining and Mineral Mining), and Region - Forecast to 2022...

Know More

(PDF) Coal Mining Methods Underground Mining Longwall ,

Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining...

Know More

ctufrgsbr

FIGURE 12 Classic room-and-pillar mining this chapter; the goal of this chapter is to summarize briefly the characteristics of the major mining methods 132 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of limited thickness, such as copper shale, coal, salt and potash, limestone, and dolomite...

Know More

MINING METHODS T - cmpdi

of mining methods While opencast operations are now fully mechanized employing large capacity earth moving equipment, introduction of machinery in underground workings has been gradual In conventional bord and pillar workings coal loading and transport have been mechanized, eliminating human labour and drudgery to a large extent There have ....

Know More

room and pillar al mining ppt

Coal Mining Room And Pillar Equipments 26 2339 3 Coal mining IPFS Once room and pillar mines have been developed to a stopping point (limited by geology, ventilation, or economics), a supplementary version of room and pillar mining, termed second mining or retreat mining, is commonly started...

Know More

Room and pillar mining - Wikipedia

Characteristic of R & P It is the most common supported pillar method, designed and used primarily for mining flat-lying seams, or tabular orebodies, or gently dipping bedded ore deposits of limited thickness (like coal, oil shale, limestone, phosphate, salt, trona, potash, and bedded uranium ores,) Room and pillar methods are well adapted to mechanization and are preferred to apply for ....

Know More

Coal Mining PowerPoint Templates and Google Slides Themes ,

Download Coal Mining PowerPoint templates (ppt) and Google Slides themes to create awesome presentations Free + Easy to edit + Professional + Lots backgrounds...

Know More

Proceedings of the Workshop on Coal Pillar Mechanics and ,

PILLAR STRENGTH The strength of coal pillars, ie, the ultimate load per unit area, is dependent upon three elements: (1) the size or volume effect (strength reduction from a smalllabora­ tory specimen of coal to a full-size coal pillar), (2) the effect of pillar geometry (shape effect), and (3) the prop­ erties of the coal ,...

Know More

Coal Mining Methods Ppt - anticacereriait

21-5-2020 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 depends on many ,...

Know More

Coal Mining PowerPoint Templates and Google Slides Themes ,

Download Coal Mining PowerPoint templates (ppt) and Google Slides themes to create awesome presentations Free + Easy to edit + Professional + Lots backgrounds...

Know More

Ground Control Design For Highwall Mining

= web or barrier pillar strength S I = in situ coal strength W = web or barrier pillar width H = mining height In situ coal strength is normally taken as 62 MPa (900 psi) Mining height can be equal to the seam thickness, but it may be greater if some rock is mined with the coal Coal Pillar Stress...

Know More