underground mining by backful method


  • Underground mining methods handbook (Book) | …

     · @article{osti_6831532, title = {Underground mining methods handbook}, author = {Hustrulid, W A}, abstractNote = {Sections discuss: mine design considerations; stopes requiring minimum support (includes room-and-pillar mining and sublevel stoping); stopes requiring some additional support other than pillars (includes shrinkage stoping, cut-and-fill stoping, undercut-and-fill mining…

  • PASTE BACKFILL MATERIALS FOR UNDERGROUND MINING

    (PDF) Underground Mining with Backfill | Tony Grice ...

  • Backfill

    Mine fill is an integral component of mines'' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes. Concrete is a common additive to backfill material to improve strength and stability in underground excavations.

  • Underground Mining Methods – EXCELLENCE IN …

     · Also, every underground mining method requires a point of entrance from the surface (e.g. adit, mine shaft, or vertical or horizontal tunnel). This entry is a key element of the development phase associate with underground mining. (Adapted from Shinobe, 1997

  • Underground Mining Methods

     · The choice of an underground mining method depends on a range of factors and these include; the size and shape of the deposit, the orientation or slope of the deposit, the depth of the deposit, geological structures, characteristics of the ore and the surrounding rocks and issues with gas and water. ...

  • Minerals | Special Issue : Backfilling Materials for …

    Special Issue Information. Backfilling of mined-out areas is a fundamental component of many underground mining operations. The backfill material provides support to the surrounding rock mass, reduces wasteful dilution, enables a safe working area for production activities and mitigates the risk of surface subsidence.

  • (PDF) UNDERGROUND MINING METHODS | Timileyin …

    2.1.1 Cut-and-Fill Method The principles of cut-and-fill mining are shown in Fig. 3. The method is designed for selective mining of the steeply dipping veins, in particular for the narrow high-grade ore bodies. The method removes the ore in horizontal slices, starting

  • An investigation of mechanisms T involved in backfill-rock mass behaviour in narrow vein mining

    backfill employed in underground mining conditions. Cemented rock and paste backfill were developed in 1980s and enabled the use of more efficient mining methods. As a major ground control element, mechanical behaviour ...

  • mine backfill underground open pit

     · For mines where backfilling is possible – and especially for mines that have selected paste backfilling as their backfill method of choice – implementing a continuous pour methodology substantially improves underground mining efficiency.

  • Underground Mining Methods

    backfill underground serves to keep the mine walls stable and also as the floor for mining the next slice. Mining continues upwards towards the surface until the ore body is depleted.

  • Types of Mine Backfill

    usually transported underground by dropping down a raise from surface directly into a stope or to a level where it is hauled to a stope with an LHD or trucks. Usually contains some adsorbed surface...

  • Underground Mining Methods: Engineering …

    Underground Mining Methods presents the latest principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented covering the commodity range from iron ore to diamonds extracted by ...

  • Underground mining at Ekati and Diavik diamond mines

    Underground mining at Ekati and Diavik diamond mines J Jakubec et al. 78 Caving 2018, Vancouver, Canada The SLR method was developed and first implemented by De Beers in 1948 at Premier Mine and evolved into a better design at Finsch (Figure 5) and

  • BASIC REQUIREMENTS OF BACKFILLING WITH FLOTATION TAILINGS IN THE BOR RIVER UNDERGROUND …

    The underground cemented paste backfill (CPB) is an important component of underground stope extraction. As the mining operations progress, paste backfill is placed into previously mined stopes to pro-vide a stable platform for miners to work on

  • CN110735639A

    The invention discloses a method for backfilling open pits after mining of types by converting open pit to underground caving method, which comprises the following steps of arranging each stope face of underground mining on or a plurality of strips according to the ...

  • Underground Mining Methods

    2 Underground Mining Methods Teacher Information drilling of the now higher roof continues. The roof is blasted till it is so high that it cannot be reached by a jumbo. Then a jumbo working in a higher elevation drift is used to intersect the stope. After blasting, the ore ...

  • A review of underground mine backfilling methods with …

    5185 Vol. 20 [2015], Bund. 13 sand, river sand, and crushing sand to fill underground mined voids like stopes (Yao et al. 2012). An example of hydraulic backfill is shown in Figure 2. The access drives to mine are blocked with bulkheads and a drainage system is inserted into the bulkhead so water from backfill drains out of the stope. . Hydraulic backfill material is poured inside the stope ...

  • 12. Mining methods and method selection

    12.4 Underground mining method •Room-and-pillar mining-Normally applied in flat-lying stratiform or lenticular orebodies admitting an orebody dip up to about 30 .-Rooms serve the multiple roles as ore source, access opening, transport drift, and airway.-Pillars are

  • Underground mining methods

     · Underground mining methods: These are the methods/techniques employed when the depth of the deposit,the stripping ratio of the overburden to ore,or both becomes excessive to surface exploitation. Choice of an underground mining method is often closely related to the Geology of the deposit and degree of ground support necessary to make the method productive and safe.

  • Types of Underground Mining Method Comparison

     · In any discussion of Methods of Underground Mining Comparison, one is repeatedly confronted with the difficulty of dealing with so many variable conditions. It is not an exact science and in the choice of a method each varying factor has a certain weight, which, in …

  • Techniques in Underground Mining

    Methods for Underground Mining The choice of mining method is influenced by the shape and size of the ore deposit, the value of the contained minerals, the composition, stability and strength of the rock mass and the demands for production output and safe working conditions (which sometimes are …

  • Mine backfill solutions for underground construction

    Backfill, the process of back filling material into the underground voids created by mining, is essential in many underground operations for the holistic extraction process. Backfill material types and processes are numerous but generally utilize a

  • Design and Application of Underground Mine Paste …

     · Underground cemented paste backfill (CPB) is an important component of underground stope extraction, and is commonly used in many cut-and-fill mines in Canada (e.g., Landriault et al. 1997; Naylor et al. 1997; Nantel 1998).As mining operations progress, paste ...

  • Types of Mine Backfill

    Paste Backfill Dry Fills generally consists of surface sand, gravel, open pit waste rock, underground waste rock,smelter slag generally unclassified except to remove large boulders usually transported underground by dropping down a raise from surface directly

  • Underground Mining Methods and Equipment

    underground operation for improving mining recovery, safety, and mitigating surface subsidence, a fill raise will be constructed for transporting backfill materials prepared at the backfill plant on the surf ace to underground stopes.

  • What is Underground Mining? (with pictures)

    Underground mining is a technique used to access ores and valuable minerals in the ground by digging into the ground to extract them. This is in contrast with techniques like open pit mining, in which the surface layers of ground are scooped away to access deposits, or mountaintop removal, in which the top of a mountain is simply shaved off to access the ore inside.

  • mining engineering: Backfill

     · Backfill is the term for material used to fill voids (empty stopes) created by mining activity. "The reasons for putting backfill underground range from providing regional support to disposal of a waste product. The fill serves many functions, although it …

  • Different back fill materials used in underground mines

     · Different back fill materials are used depending on the mining method and the extraction sequence of the stopes in an underground mine. Common fill materials are cemented aggregate fill (CAF), cemented rock fill (CRF), hydraulic fill (HF), cemented hydraulic fill (CHF), cemented paste fill (CPF), and uncemented rock fill (URF).

  • 12. Mining methods and method selection

    12.4 Underground mining method •Cut-and-fill stoping-Mostly mining proceeds up-dip in an inclined orebody.-Drilling & blasting about 3 m thick ®scaling & support ®ore loading & transport ®backfilling of depth equal to the thickness of sliced ore.-Reliable control

  • Description of mining methods (step by step)

    Primary Mining Method Long-hole bench stoping with backfill. Information The ore between each ore drive horizon is stoped using long-hole benching. Traditionally, Kundana has used the long-hole open stope benching, this is a simple retreat method which uses 10 ...

  • Numerical Simulation of Surface Subsidence and …

     · Surface subsidence induced by underground mining is one of the challenging problems in mining engineering, which can destroy ground surface buildings and cause huge economic losses to the mine. In this study, a two-dimensional numerical model, established by the discrete element method code PFC2D, was adopted to investigate the mechanical mechanism of surface subsidence and backfill …

  • Tailings Backfill of Tailings to Underground Workings

    Backfill of Tailings to Underground Workings Figure 1: Filling of an Underground Stope (© Barrick Gold) Introduction Tailings can be stored below ground in previous worked out voids. The tailings are generally mixed with a binder, usually cement, and then pumped ...

  • [PDF] An overview on the use of paste backfill …

    This is a general overview on the use of paste backfill for ground support in underground min- ing operations and as such, concerns backfill design parameters (internal pressure development, required strength and mix optimisation), its pumping qualities (consistency and rheological) and delivery to an under- ground operation through pipelines. Emphasis was placed on the optimization of the ...

  • Mining with Backfill

    Backfill refers to any waste material that is placed into voids mined underground for the purposes of either disposal or to In some mining methods the backfill forms a working platform perform some engineering function. Waste materials used for people and equipment and therefore must be capable of supporting the traffic.

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