Bord And Pillar Mining

Bord-and-pillar mining has some favourable promises such as improving labour difficulties, lowering operating costs and providing safer working conditions.

low production rates when compared with bord-and-pillar mining in thicker seams. There is a need to evaluate the various equipment that is used in the bord-and-pillar method in low seams, so that the most effective can be established. The relatively small number of …

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 will depend on the extent of the research and development efforts which need to create and innovate ...

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.

Bord and pillar method of mining coal seam involves driving two sets of parallel inseam headings, one set being orthogonal to another, thereby forming square or rectangular pillars. These pillars are subsequently extracted allowing the overlying strata to cave in the decoaled area. In some cases where circumstances so ...

Early bord-and-pillar extraction mining methods however left much of the resource unmined, and during the 1960s total extraction methods, such as long walling and pillar extraction, were introduced to improve extraction (Cillié and Savage, 1961).

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 will depend on the extent of the research and development efforts which need to create and innovate ...

The document discusses the bord and pillar method of underground coal mining. It involves driving parallel roads called bords separated by coal pillars. Development involves driving the bords and pillars, followed by depillaring which extracts the pillars. Factors like seam thickness, depth, and roof/floor strength determine suitability. Support systems like roof bolting are used …

widths) applicable to platinum and chrome mines using bord and pillar mining method in the Bushveld Complex, South Africa. A number of mining operations were identified for the purpose of participation in the research project. The mines were visited and interviews were conducted with key rock engineering personnel. ...

Bord and Pillar method of mining is one of the oldest methods. The key to the successful Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too small the mine will ...

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 time that the workings are required to be serviceable. ... In underground mining, first ...

A recent experimental pillar extraction project at a UG2 bord-and-pillar mine presented a unique opportunity to compile a new pillar database. Currently, the South African hard rock bord-and ...

Post-pillar mining uses regularly spaced pillars to extract inclined deposits between 20-55 degrees and allows filling of the mined space. It also discusses considerations for gallery dimensions, pillar dimensions and configurations, recovery strategies, equipment used, and operational aspects of board and pillar mining. Read less

Bord and pillar mining operating costs are generally higher than those of a longwall but it may provide better utilisation and return on investment in the long term with this greater flexibility and availability. 20 February 2023.

Guidelines for hard rock pillar design in South African bord-and-pillar operations are presented in this report as well as a proposed multi-year research project to address the unknowns in terms …

The document discusses the bord and pillar method of underground coal mining. It describes how the method involves driving a series of parallel roads separated by blocks of coal (pillars) to develop the mine. After development, the pillars …

Bord and pillar mining method comprises two phases, i.e., development or 'whole working' and depillaring or 'broken working'. Sometimes both these phases proceed simultaneously.

Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining. 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

by the highwall mining system (Porathuir et al. 2017). In this manner, the coal is accessed from galleries starting at the base of the highwall and driving their way through the deposit. Nevertheless, in the case examined the exploitation is not being made by auger systems but by using the room and pillar mining scheme without any recovery of ...

Unlock the secrets of Room and Pillar Mining with our beginner's guide. Discover the techniques and equipment used and how to safely and efficiently extract coal and other minerals from underground mines.

The paper points out that bord-and-pillar mining is the most important method of coal extraction in South African underground coal mines, and advocates that pillar design procedures should be ...

One among the oldest methods of mining is that the Bord and Pillar. It's a way within which the mined material is extracted across a horizontal plane while leaving "pillars" of untouched …

This diagram shows the traditional method of bord and pillar mining. Miners extracted coal along roadways or bords, with the coal between the bords acting as pillars holding up the roof. The …

Anyway, this is a good example of benching used in room and pillar mining. Figure 9.3.4 Room and Pillar employing a conventional cycle. Source: . A defining characteristic for the selection of the room and pillar method, as I explained earlier, is a relatively flat lying deposit. What if you meet the characteristics of the ...

The bord and pillar system is the most popular underground coal mining method in India concerning the geo-mining complexities. The conventional mining practices adopt a cyclic process of drill and blast to extract the coal. Numbers of technical advancements have been witnessed in the underground coal mining sector during the

Chikande et al. (2022) created and implemented a ventilation-on-demand (VOD) system for the bord and pillar mining method at a platinum mine in Zimbabwe to reduce the usage of excess air in the ...

French Lorraine iron ore accounts for 94% of the total production, while 58 mines in Lorraine are mined by the room-and-pillar method. In the United States, the method is used by 65 percent of ...

The mine produces washed prime coking coal. The colliery is currently being operated in Seam 9 and Seam 11 employing the bord and pillar method. It should be mentioned here that the bord and pillar mining method comprises two phases, i.e. …

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 ...

MINING METHODS (UNDERGROUND COAL) 1.0 INTRODUTION TO UNDERGROUND COAL MINING : 1.1 Classify Underground Coal Mining Methods. Method of winning coal in underground mines are classified into two main categories : 1. Bord and pillar (also known as pillar and stall) and its modification. 2. Longwall (i) Advancing, (ii) Retreating.