mining methods pillars

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  Stability analysis of underground mine hard rock pillars via ...

  202181 · Stability analysis of underground mine hard rock pillars via combination of finite difference methods, neural networks, and Monte Carlo simulation techniques - ScienceDirect

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  (PDF) A review of pillar design for platinum mining to …

  2015628 · Abstract and Figures. Any bord and pillar platinum mine thrives on effective design of bords and pillars. Pillars have to be large enough to ensure safety and small enough to ensure economic and ...

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  Coal mining - Underground, Surface, & Drilling | Britannica

  202471 · Coal mining - Underground, Surface, & Drilling: 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 …

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  Optimization of Chain Pillars Design in Longwall Mining …

  202155 · ABSTRACT. Chain coal pillars are parts of the structure of longwall mining system that play a significant role in the stability of the entries. With mechanization and developments in the various aspects of the method, higher efficiency in optimization of the design of chain coal pillars seems appropriate. In this paper, the three main methods ...

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  Coal pillar failure analysis and instability evaluation methods: …

  202281 · Coal pillars in underground mines serve various purposes such as entry or roadway protection, surface subsidence control, goaf isolation, mine shaft protection, and waterproofing [76], [146], [138]. These functions can be associated with a range of mining methods, resulting in various pillar types, as shown in Table 1.

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  Mining Strategies of Multi-Sill Pillars In Burst Prone Ground ...

  2010627 · ABSTRACT:. 153 Orebody at Coleman Mine is a narrow vein stringer dipping between 30 to 70 degrees. Current mining extends from the 4250 level to 5100 level. The primary mining method is mechanized cut-and-fill, although drift-and-fill is also used in wider sections of the ore zone. The ore body is divided into six main mining horizons with …

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  Stability of a coal pillar for strip mining based on an elastic …

  201691 · The strips left behind, called strip pillars, are designed to support the overburden, prevent surface subsidence and protect the surface structures and ecological environment. Therefore, the strip mining is widely used in China coalmines.2, 3, 4 In the strip mining, the most important task is to maintain the stability of coal pillars.

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  A Comparative Study of Various Empirical Methods to …

  2024420 · Board and Pillar mining method is one of the underground mining methods that commonly used for the extraction of coal seam in India. It involves driving two sets of parallel inseam headings, one set being orthogonal to another, thereby forming square or rectangular pillars.

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  Case study on pressure-relief mining technology without …

  Semantic Scholar extracted view of "Case study on pressure-relief mining technology without advance tunneling and coal pillars in longwall mining" by Yajun Wang et al.

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  (PDF) Pillar design in coal mines - ResearchGate

  198011 · Abstract. 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 ...

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