Bord And Pillar Mining - nnguniclub co za

Bord And Pillar Mining - nnguniclub co za

May 07 2013· Bord and Pillar Method Mine Ventilation by OcS OcSTeam Global Mining 105 437 views 2 59 World Dangerous Idiots Excavator Heavy Equipment Operator Skill

bord and pillar mining india - elfi me

bord and pillar mining india - elfi me

Bord and Pillar mining is the oldest and most popular mining method to extract coal from underground It is simple easy to operate and reasonably safe The pillars form the natural support to the overburden roof and transfer the load to floor In the process a large portion of the coal remain blocked for long …

Bord and pillar mining Coal and coal mining Te Ara

Bord and pillar mining Coal and coal mining Te Ara

Geotechnical investigation for support design in depillaring … In India Bord and Pillar Method of mining is very much in practice in underground coalmines Roof support which is an important aspect of ground control … More detailed

bord and pillar mining india - BINQ Mining

bord and pillar mining india - BINQ Mining

As bord and pillar workings are developed roof support becomes a major consideration and operating cost item Support requirements vary considerably and are dependent on the physical conditions in the seam which are often depth dependent and the length of …

A case study illustration of the layout and support in an

A case study illustration of the layout and support in an

The different underground mining methods used in India for extraction of coal are conventional method ie Bord and Pillar method Longwall method Shortwall method Miniwall method etc In India about 90 of U G coal output is obtained by Bord and Pillar method and barely about 10 around by …

Evaluation of Current Pillar Design Practice in Ramagundam

Evaluation of Current Pillar Design Practice in Ramagundam

Presently the seam is being developed on bord and pillar method of mining and the blasted coal is loaded manually into tubs using hand shovel and basket Considering a need of the Indian

Presentation 1 Coal Mining Mining - Scribd

Presentation 1 Coal Mining Mining - Scribd

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

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN - …

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN - …

thick seams worked with bord and pillar mining methods is presented A mine located in India which has a 22 year history of working a 10m thick coal seam with the blasting gallery BG technology for extraction of the pillars was selected for the study

Chronological development in coal pillar design for bord

Chronological development in coal pillar design for bord

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES Generally for Indian mines the proposed safety factor is 1 5-1 8 A correlation between safety factor The key to the successful Bord and Pillar mining is selecting the optimum pillar size If the pillars are too small the mine will collapse If the pillars …

bord and pillar mining - k-vier nl

bord and pillar mining - k-vier nl

Of the total output of coal from underground mines more than 90 of coal is obtained by the bord and pillar method the predominant method of mining followed in India and the rest is mined by the longwall mining method The Indian coal mining industry has witnessed a persistent decline in underground …

Bord And Pillar Mining India - Henan Mining Machinery and

Bord And Pillar Mining India - Henan Mining Machinery and

2013 02 26· Geotechnical investigation for support design in depillaring In India Bord and Pillar Method of mining is very much in practice in underground coalmines Roof support which is an important aspect of ground control online mining ppt for conveying systems in open cast

bord and pillar mining method - samensterkvoorpreventie nl

bord and pillar mining method - samensterkvoorpreventie nl

working height leaving the pillar core as a natural support to the roof Over 45 overall large percentage of the total coal reserves in India The prevailing method of bord and pillar mining was inadequate as recovery was low and required stowing with sand not easily available in many areas The feasibility of …

UNDERGROUND COAL MINING FACTORS COST AND …

UNDERGROUND COAL MINING FACTORS COST AND …

mine ventilation in a bord and pillar mines using cfd - IJETAE Feb 9 2013 Indian School of Mines Dhanbad India An underground mine is associated with a proper ventilation system Challenges of Environmental Management in Indian Coal Mining Mining of coal underground in India starts in the form of narrow gallery In board and

Bord and Pillar mining by continuous Miner in HINDI - YouTube

Bord and Pillar mining by continuous Miner in HINDI - YouTube

Pillar design and extraction methodology for Multi-seam Workings and Steeply Incline coal mines Expertise in the design of extraction methodology for developed Bord Pillar Workings in underground coal mines using Mass Production Technology such as Continuous Miner Technology Shortwall Mining and Blasting Gallery Method

Proactive Strategies for Prevention and Control of Fires

Proactive Strategies for Prevention and Control of Fires

of the mines in India are worked by the bord and pillar method of mining our model has been designed for this method to serve a maximum number of mines Among the systems of extraction in the bord and pillar method depillaring with formation of small pillars as final operation extraction by broadening …

underground mining bord and pillar - natureslimsecrets co za

underground mining bord and pillar - natureslimsecrets co za

Jun 02 2010· At present production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bord-and-pillar methods Since it is envisaged that longwall mining will require time to become established in India bord-and-pillar …

underground board pillar coal ventilation plan in india

underground board pillar coal ventilation plan in india

types of underground mining - ace-low-carbon underground mining bord and pillar Open-cut mining can be more effective than underground methods generallyThe two main types of underground mining in NSW are bord-and-pillar and Underground mining methodsSlideShare Underground Mining …

Longwall Mining - an overview ScienceDirect Topics

Longwall Mining - an overview ScienceDirect Topics

• Pillar sizes will generally range from 30 to 100 feet and have a rectangular configuration • Extraction Ratio is the ratio of coal removed compared to estimated in-place tonnage normal extraction ratio is from 35 to 55 retreat mining will result in extraction ratios of up to 70

Rib snook design in mechanised depillaring of rectangular

Rib snook design in mechanised depillaring of rectangular

BORD AND PILLAR MINING METHOD DEVELOPMENT WORK • In development Bord and pillar mining method comprises of two phases 1 • • One set of gallery is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles

COAL MINING IN INDIA AN OVERVIEW

COAL MINING IN INDIA AN OVERVIEW

In deep mining the room and pillar or bord and pillar method progresses along the seam while pillars and timber are left standing to support the mine roof 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

A case study illustration of the layout and support in an

A case study illustration of the layout and support in an

bord and pillar mining working photos 201342 in underground coal mining bord and pillar is the method of working mining equipment to gold ore More Info Live Chat bathopele mine rustenburg technology mining method underground location bathopele mine geology mining activity at bathopele involves the bord and pillar mining …

Bord Pillar Method Mining Coal - Scribd

Bord Pillar Method Mining Coal - Scribd

types of underground mining - ace-low-carbon underground mining bord and pillar Open-cut mining can be more effective than underground methods generallyThe two main types of underground mining in NSW are bord-and-pillar and Underground mining methodsSlideShare Underground Mining Methods By Tayyab anwar MN Asifthat require some type of backfill to provide substantial amounts …

bord and pillar zinc mining ppt - bpes nl

bord and pillar zinc mining ppt - bpes nl

Jul 29 2016· Bord and pillar is an underground mining method for extracting coal from belowground of earth Various machinery combinations are used for extracting One of the combination is the continuous

Chronological development in coal pillar design for bord

Chronological development in coal pillar design for bord

Presently the seam is being developed on bord and pillar method of mining and the blasted coal is loaded manually into tubs using hand shovel and basket Considering a need of the Indian

Mining Methods Design Simulation - Central Institute of

Mining Methods Design Simulation - Central Institute of

Room and pillar variant of breast stoping is a mining system in which the mined material is extracted across a horizontal plane creating horizontal arrays of rooms and pillars To do this rooms of ore are dug out while pillars of untouched material are left to support the roof overburden Calculating the size shape and position of pillars …

underground mining bord and pillar - natureslimsecrets co za

underground mining bord and pillar - natureslimsecrets co za

COAL MINING IN INDIA AN OVERVIEW 2nd INDO-US COAL Bord Pillar with SDL LHD Powered support Longwall Continuous miner SAFETY STATISTICS in COAL MINING SECTOR 9Captive mining by Power Steel Cement industry allowed 9Foreign Direct Investment 100 for …

MINING METHODS T - scienceandtech cmpdi co in

MINING METHODS T - scienceandtech cmpdi co in

bord and pillar mining india grinding mill china icmeet room and pillar coal mining Grinding Mill China room and pillar coal mining Room and pillar Wikipedia the free encyclopedia mtw series trapezium mill indore india Chat A case study illustration of the layout and support in an 1 Bord and Pillar …

Room and pillar mining - Wikipedia

Room and pillar mining - Wikipedia

Bord 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 Then the outer pillars were mined leaving the roof to collapse in a controlled way …

Bord Pillar Mining Science and Technology

Bord Pillar Mining Science and Technology

Chronological development in coal pillar design for bord and pillar workings A critical appraisal JEE-ISM Indian School o f Mines Bord and pillar method of mining coal seam involves

Design of Bord and Pillar method in coal mines - SlideShare

Design of Bord and Pillar method in coal mines - SlideShare

•Bord Pillar is the traditional mining method used in India •It is employed where geo-mining conditions are complex •Coal is removed from the coal faces initially by developing a set of galleries leaving pillars in between to support the roof