bord and pillar mining philippines

Bord and pillar applications on the platinum mine T

The mining layout is exactly the same as that of the normal bord and pillar layout see Figure 3 The bords are 4 m wide and pillar sizes are 13 m x 13 m thus creating centres of 17 m The stopping width in the development phase is 18 m 02 m hanging wall 08 m UG2 reef and 08 m footwall The pillar that is created is then stoped out...

Board Pillar Coal Colliery and Mining Forum

Apr 17 2015 0183 32 You should have joined in on the debate as it was not mentioned about a certain depth for Bord and Pillar but a mention by a Mining Engineer that at greater depth there was need for larger pillars with his link to the Coalbrook disaster in South Africa in 1960...

Applying Numerical Modelling to Pillar Design in South

Bord or room and pillar mining is a favoured approach in many shallow depth and near horizontal tabular mining operations in South Africa including coal mines plus hard rock gold platinum chrome and manganese Where pillars are intended to be stable and remain intact most pillar design involves the use of empirical formulae...

Room Pillar Mining Method

Oct 31 2019 0183 32 References Hassan Z Harraz 2014-2015 Underground Mining Methods Room and Pillar method Asim Kumer Satapathy Department of mining engineering national institute of technology Rourkela-769008 2016 Criteria for selection of Board and Pillar for multiple seams Aashutosh Chhirolya Design of BORD and PILLAR method in coal seams JT Jordaan...

Drilling and bolting tools

BORD AND PILLAR MINING Drilling and bolting tools We offer a comprehensive range of drilling accessories suitable for the installation of strata support products Our drilling and bolting tools offer you superior life drilling productivity and safety Request a quote Find us...

Design of Bord and Pillar method in coal mines

Feb 27 2016 0183 32 Bord and Pillar method of mining is one of the oldest methods 3 INTRODUCTION In India about 98 of underground output of coal is obtained by Bord and Pillar method and barely about 2 by longwall methods The other countries where Bord and Pillar method predominates are Australia The USA and South Africa...

v117n2a8 Reflections on narrow

Pillar-supported mining methods such as bord and pillar require a reliable design system for them to be successful This paper presents an evaluation of the current hard-rock mining pillar design systems as applied to a practical large-scale narrow-reef platinum mining feasibility study It is vital to have a...

Mining Funda Bord and Pillar method of Mining

Bord and pillar mining method comprises two phases ie 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 angl...

Numerical Study on an Applicable Underground Mining

mining is considered limited potential since the proper-ties of rocks are very weak and the coal seams are ex-tra-thick that might occur large ground disturbance/sub- sidence and thus it is possible to occur the pit instability and many problems Therefore the multi-slice bord-and- pillar mining was firstly considered in this study and its...

Academics in Bord and Pillar Mining Technology

View Academics in Bord and Pillar Mining Technology on Academiaedu...

Case studies of tendon support design in Bord and Pillar

Southern African underground Platinum and Chrome Mines exploit the tabular platinum-and chrome-bearing orebodies using either conventional mining methods making use of jackhammers and air legs mechanized bord/room and pillar mining layouts or a...

Bounty to expand Cook using bord and pillar methods

BOUNTY Mining intends to expand operations at the Cook Colliery in Queensland to four underground mining areas producing 22 million run-of-mine tonnes per annum using bord and pillar mining methods after raising 18 million through an initial public offering...

Mining Maloma

Mining The mine conducts conventional mining which comprises of bord and pillar mining trackless mining with diesel load haul dumpers and hand and air drilling for coal and jackhammers for stone development Driving the current mine operations are 2 production sections and 2 development sections Mining occurs at a depth of a maximum value...

PDF Underground Mining Methods Room and Pillar method

Room Bord -and-Pillar Layout In room pillar mining high safety levels in design is important and to achieve this understanding the behaviour of the pillars is essential It is...

Pillar design

Stresses in pillar boundary must be sufficiently low that mining conditions are acceptable with reasonable levels of support The following graph shows case histories from Canadian hard rock min If it is considered stable the factor of safety is greater than 14 and if it is considered failure factor of safety is less than 1 7...

Bord and Pillar mining

Our cutting tools for bord and pillar mining fit either continuous miners or roadheader machin They feature a hardened steel body/shank fitted with a wear and impact resistant tungsten carbide tip Depending on the application we also...

PBE Mining Process

mining similar capex to bord and pillar mining Low Operating Cost Similar low operating costs to longwall mining significantly less than bord and pillar PBE ACHIEVEMENTS Remote Operating System All Personnel are Removed from mining hazards and core UG coal mining risks...

Room and pillar mining

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 overburdenCalculating the size shape and position of pillars is a complicated procedure and is an area of...

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

The success of Bord and Pillar mining is selecting the optimum pillar size If the pillars are too large then the extraction ratio decrease leading to less production and profitability and if the pillars are too small it becomes venerable to human safety The issues relating to the stability of pillars...

Major Mines Projects

Mine 2 and mine 3 use both bord-and pillar and shortwall methods to mine seam 2 S2 and seam 4 S4 coal seams In 2019 Matla continued with pillar extraction stooping as a mining method to maximise Resource extraction At mine 2 there are four continuous miner CM sections two currently stooping and a shortwall section mining S2...

bord and pillar mining

Bord-and-pillar mining explained Illawarra Mercury May 31 2017 Bord-and-pillar extraction is the older of the methods and The word bord is not a misspelling of board but a mining term for an underground space or get price...

PDF Success of Continuous Miner in Bord and Pillar Method

This paper deals with the use of continuous miner and its success in bord pillar method of underground coal mining Discover the world s research 19 million members...

Room and pillar mining method

Nov 22 2019 0183 32 Room and pillar is a common mining method mining ore bodies with a dip less than 50 degre There are different variations of the method depending on rock...

Bord and Pillar Methods Coal Colliery and Mining Forum

Coal Colliery and Mining Forum Mining Methods and Geology Bord and Pillar Methods Mining Methods and Geology Long and Shortwall mining Bord and Pillar Methods General chat about bord and pillar Threads and Posts Total Threads 5 Total Posts 83 This board has 1 moderator On This Board You cannot create threads You cannot reply...

Evaluation of Bord And Pillar mine Working in MCL Mines

National Institute of Technology Rourkela CERTIFICATE This is to certify that the thesis entitled EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES submitted by Sri Ram chandra Nayak Roll No 10605015 Sri Sangram keshari Dalai Roll No 10605027 in partial fulfillment of the requirements for the award of Bachelor of Technology degree in Mining Engineering at the...

Room and Pillar Mining

Pramod Thakur PhD in Advanced Mine Ventilation 2019 21341 Self-Inertization In room and pillar mining pillar extraction can be so designed that mined out area is submerged in waterThis provides excellent inertization but is possible only in highly inclined coal seams Most commonly self-inertization is provided by the methane gas released from coal seams in the gas emission space...

Numerical Study on an Applicable Underground Mining Method

The EGAT Mae Moh Mine is the largest open pit lignite mine in Thailand and it produces lignite about 16 million tons annually In the near future the pit limit of the mine will be reached and underground mine will then be developed through the open pit in the depth of 400 - 600 m from the surface However due to the challenges for underground mining such as poor geological conditions extra...

Mining subsidence and its effect on the environment some

Oct 21 1999 0183 32 The impact of mining subsidence on the environment can occasionally be very catastrophic destroying property and even leading to the loss of life Usually however such subsidence gives rise to varying degrees of structural damage that can range from slight to very severe Different types of mineral deposits have been mined in different ways and this determines the nature of the...

Items where Subject is Bord and Pillar Mining

Indian Mining Engineering Journal 14 5 pp 11-18 ISSN 0019-5944 Baijal RN and Chhabra NS and Singh B 1969 Investigations into the Development of Strains in a bord and Pillar Working Journal of Mines Metals Fuels 17 6 pp 192-197 ISSN 0022-2755...

VENTILATION PLANNING LAYOUTS FOR LARGE OPENING

Large room-and-pillar stone mining fundamentals The value per ton of ore for large room-and-pillar stone mines is typically low therefore productivity must be high Typical face areas are 122 m wide x 76 m high 40 ft wide by 25 ft high with 43 m 14 ft pulled with each blast Figure 1 This equates to over 1 000 tons of stone per...

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