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photos, news and contributions to: Bets La Cock (Executive to extend our life of mine at Khanyisa through pillar mining and at Intibane through the acquisition of of ±59% during primary bord and pillar
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.
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
The Robert M. Buchan Department of Mining Queen's University Created: March, 2012 Note: This article focuses primarily on hard-rock room and pillar mining. Complimentary to this article, is a case study on post room and pillar mining which can be accessed here.
Photo Search Photo Galleries Search by Color New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Mineral Photography N. of Eng. A system of mining in which interlacing roadways are driven at right angles into the seam, leaving small square or rectangular pillars of coal of from 30 to 50 yd (27 to 46 m) side length, which are then wholly or partly
1 Cross section of typical Bord and pillar layout 11 2 Type of machineries in pillar mining 12 3 The tributary area pillar loading concept 19 4 The pressure arch theory 21 5 Multiseam working exploiting the intra-dosal region of pressure arch 21 6 Methods
The second working is similar in principle to top slicing. The remainder of the coal is won by a retreating system, the cover being caved after each unit has been worked. The term bord-and-pillar is not used to any great extent in American mining literature, but has a place in English literature.
5/12/2016 1.1.3 At the working face..4 Chapter-2 Literature Review.....5 2.1 Barton’s Q-system (NGI-Q as well as depillaring working in order to prevent the accident due to roof fall and side fall in underground bord and pillar mining 1.1.1 Present support system At
View Evaluation of Bord And Pillar mine Working in MCL Mines from MINING MN 201 at NIT Rourkela. EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES A
Guidelines for drawing of support plans in bord & pillar Barton’s Q-system Bieniawski’s RMR system 11 12 13 2.4 CMRI-ISM Rock Mass Classification 13 2.5 Design of support for development & depillaring working 17 2.6 Monitoring and control of strata2.7 19