bord and pillar mining method

Coal mining methodsCoal mining methods

Mining Methods and Geology Bord and Pillar Methods Mining Methods and Geology Bord and Pillar Methods General chat about bord and pillar Threads and Posts Total Threads 6 Total Posts 81 This board has 1 moderator On This Board You cannot create threads

Room-and-pillar mining coal mining Britannica

This mining technique works best for materials located along the same horizontal plane or stratum Room and pillar mining may also be known as bord and pillar mining in some areas Throughout history miners have used a random room and pillar mining strategy to extract minerals from the earth Workers would simply mine in certain areas and

Room and pillar mining - Wikipedia

Mining method and equipment 4 2 1 General The bord and pillar mining layout will be maintained because of its reliability flexibility low capital cost low working costs and large skills source availability Woodruff 1966 Increasing mechanization has resulted in …

Bord-and-pillar mining in inclined orebodies

Coal mining methodsCoal mining methods -- Green Coal Technology GCT Green Coal Technology GCT - Safety first Kikuo MATSUI Dr Eng ProfessorProfessor Department of Earth Resources and Mining EngineeringDepartment of Earth Resources and Mining Engineering

What Is a Room and Pillar with picture

paramount The success of platinum mining by the bord and pillar method depends heavily on a comprehensive and dependable pillar design method Pillars need to be large enough to safely support the load and small enough to avoid loss of resources A critical evaluation of current pillar design systems used in narrow-reef platinum mining was

Major Mines Projects Mototolo Mine

Coal Mining Methods Underground Mining Longwall Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground with room-and-pillar being the traditional method in the United States Both methods are well suited to extracting the relatively flat coalbeds or coal seams typical of

Digging deeper Mining methods explained Anglo American

Bord-and-pillar Bord-and-pillar or room-and-pillar is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of coal to support the mine This method has been in

Bord Pillar Method Mining Coal - Scribd

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…

Bord and Pillar Methods Coal Colliery and Mining Forum

UNDERGROUND COAL MINING FACTORS COST AND TIME CONSIDERATIONS Presented by Definition of Room and Pillar Mining • A system of extracting coal by driving a series of openings referred to as • A high extraction method of mining along the face of a predefined block of coal referred to as a panel while allowing the immediate roof

NSW Mining Methods - NSW Mining

The underground mining methods we use include room and pillar narrow vein stoping and large-scale mechanised mining Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them which are gradually cut away as the work proceeds We use this for mining coal

Bord-and-pillar mining explained Illawarra Mercury

Sep 10 2012· This video provides a basic description of the room pillar mining method for extracting coal underground It includes an explanation of the different products working together in a room pillar

v117n2a8 Reflections on narrow-reef platinum mining pillar

9 Blasting Gallery Method Conventional bord and pillar mining in thick seams is associated with very low percentage of extraction around 30 in a panel even under favourable conditions Extensive development of pillars carried out

Room and Pillar Mining Method - SlideShare

Basic parameters of bord and pillar mining system 1 Gallery bord 2 Pillar 3 Junction Calculation of percentage of extraction during development If coal from the full seam thickness is extracted the percentage of extraction during development is nearly 20 in deep mines and 35 in shallow mines

PDF Underground Mining Methods Room and Pillar method

UNESCO EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING Vol II - Underground Mining Methods and Equipment - S Okubo and J Yamatomi ©Encyclopedia of Life Support Systems EOLSS Figure 2 Room-and-pillar mining Pillars of original bedrock are left to support rock pressures and to protect personnel

Design of Bord and Pillar method in coal mines

The mining method is bord and pillar Processing Technologies Flotation Source Summary Froth flotation is the primary mineral processing separation step employed in the beneficiation of PGM ore bodies Anglo Platinum operates a significant portion of the total installed flotation capacity in the PGM industry which is installed at 20

Definition of bord-and-pillar method - Mindat org

Bord And Pillar Mining Equipment Bord and pillar mining coal and coal mining te ara 2006612enspenspbord and pillar mining next this diagram shows the traditional method of bord and pillar mining miners first extracted coal along roadways or bords while the coal in between the bords acted as pillars holding up the roof Details

Bord and pillar mining method - ferien-in-dornum de

This diagram shows the traditional method of bord and pillar mining Miners first extracted coal along roadways or bords while the coal in between the bords acted as pillars holding up the roof Then the outer pillars were mined leaving the roof to

MINING METHODS T - scienceandtech cmpdi co in

Bord and pillar mining Coal and coal mining Te Ara 2006612 ensp· enspBord and pillar mining Next This diagram shows the traditional method of bord and pillar mining Miners first extracted coal along roadways or bords while the coal in between the bords acted as pillars holding up the roof

Coal mining - Choosing a mining method Britannica

mine coal ROM The mining methods used are a mechanized bord and pillar method that utilizes continuous miners CM and a small-scale contractor operated opencast which utilizes trucks and shovels1 There are 5 accepted coal seams in the Witbank coalfield named numerically from 1 to 5 from the bottom2 Mining at Khutala Colliery

Bord And Pillar Mining Method - logansainlez be

The T-cut mining method is basically a partial pillar extraction method The pillar 13 m x 13 m created by the bord and pillar development is being stoped only the UG2 reef out for 2 m from the roadways on all sides to leave an effective pillar of 9 m x 9 m This method creates the required higher extraction percentage and higher Run of

Mining Funda Bord and Pillar method of Mining

mining utilizing the bord and pillar method has been practised in South Africa before but at a depth of less than 100 m in the Witbank coalfields Multi-seam mining in thin seams has also been performed in the Natal coalfields at a depth of less than 160 m but mostly using bord and pillar mining and secondary mining partial pillar extraction

bord and pillar mining equipment - rodiziogrill be

Nov 21 2019· Bord and pillar mining method comprises two phases i e DEVELOPMENT and DEPILLARING Sometimes both these phases proceeds simultaneously In development pillars are formed by driving a network of galleries of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles

Productivity Improvement in Underground Coal Mines - A

The only way to achieve this is to reduce production costs by improving productivity efficiency and the effectiveness of the equipment This paper aims to identify the various factors and problems affecting the productivity of underground coal mines adopting the bord and pillar method of mining and to propose suitable measures for improving them

PREVIOUS AND CURRENT MINING METHODS

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 …

Coal Mining Methods

Combining the features of both Bord and Pillar methods and Longwall methods there is another method of mining coal seams which is known as the Shortwall Method of mining It incorporates the advantages and disadvantages of both Bord and Pillar methods and Longwall methods

May 31 2017· What is bord-and-pillar mining Two main methods of extraction are used for underground coal mines in New South Wales longwall and bord-and-pillar extraction

Major Mines Projects Wessels Mine

proven mining method in these conditions and has a lower risk operational failure Bord-and-pillar mining has some favourable promises such as improving labour difficulties lowering operating costs and providing safer working conditions The success of mechanized bord-and-pillar mining in narrow tabular steep dipping orebodies

Bord and pillar applications on the platinum mine T-cut

Bord and pillar mining method Room and pillar mining method - slideshare oct 22 2014 room and pillar mining method 1 hassan z harraz email protected 2014- 2015 this material is intended for use in lectures presentations and as handouts to students and is provided in power point fo

UNDERGROUND COAL MINING FACTORS COST AND …

Definition of bord-and-pillar method A system of mining in which the distinguishing feature is the winning of less than 50 coal on the first working It is more an extension of the development work than mining The second working is similar in principle to top slicing The remainder of the coal is won by a retreating system the cover being