Post Pillar Cut And Fill Mining Method

Post pillar case study - QueensMineDesignWiki

The Agnew Mine combined the beneficial supportive properties of cut and fill with room and pillar to create a highly productive and safe mining method for poor ground conditions. The pillars provide support for the hanging wall for the entire extraction period. A drawback to cut and fill is that large unsupported spans must be opened up before ...

Post-Pillar Design for Overhand Cut and Fill Mining in ...

Selective mining, such as post pillar cut and fill, is used in large, flat, irregularly shaped ore bodies where ground stability is to be maintained. This selective mining is used to open the stope to the full lateral extent of the ore body in order to minimize the dilution and maximise the recovery.

Post Pillar Cut and Fill Stoping at the Dolphin Mine of ...

The post pillar cut and fill stoping method has been adopted by King Island Scheelite for the extraction of the main Dolphin orebody. The orebody is a massive, tabular deposit varying from 10 to 50 metres in thickness, and dipping at approximately 30° towards and under the sea bed. The mining method …

Hard-rock room and pillar - QueensMineDesignWiki

Possibly the most used method used in conjuntion with room and pillar is cut and fill. This integrated system is used when backfill is necessitated for pillar structural support. The most common example of this is the multi-pass systems of post pillar mining where pillars would be too high to support the openings without backfill support.

Cut And Fill Mining Method - YouTube

20-12-2017· Mining In Minnesota - Cut and Fill Mining Method 3D Animation - Duration: 6:36. ImageMaker Advertising, Inc. 108,605 views. ... Room and pillar mining method - Epiroc - Duration: 2:58.

11 Rock mechanics design concepts for post-pillar cut-and ...

7-7-2015· 11 Rock mechanics design concepts for post-pillar cut-and-fill underground mines Open PDF. Design and Performance of Underground Excavations: ISRM Symposium — Cambridge, U.K., 3–6 September 1984. Next ... room and pillar-cut and-fill is one of those methods of mining.

Design Spans – Underhand Cut and Fill Mining

man-entry methods such as underhand cut and fill to be implemented under greater controlled spans resulting in a safe and economic alternative to conventional cut and fill mining, (Mah, 2003). A database of twelve (12) underhand cut and fill operations was compiled as part of this project through mine visits. The operations were

Universidade Federal do Rio Grande do Sul

Post Room-and-Pillar Mining. Post room-and-pillar mining (or "post-pillar" mining) is a combination of room-and- pillar and cut-and-fill stoping. With this method, ore is recovered in horizontal slices starting from the bottom and advancing upward. Pillars are left inside the stope to support the roof.

Cut and Fill Stoping - LinkedIn SlideShare

23-10-2014· The C & F method In mining C & F generally upward (overhand) advances; there is a least common variant - C & F underhand - where the feed is from the top down. C & F advancing bottom up Prof. Dr. H.Z. Harraz Presentation Cut & Fill stoping 8 9. overhand C & F Prof. Dr. H.Z. Harraz Presentation Cut & Fill stoping 9 10.

Mining Funda: Cut and Fill Stoping

Cut and fill stoping is a method of underground mining used in vertical stopes and in mining high-grade irregular ore bodies. The rock mass surrounding the ore deposit is also usually weak unable to support loads over an extended stoping height.

11 Rock mechanics design concepts for post-pillar cut …

11 Rock mechanics design concepts for post-pillar cut-and-fill underground mines Open PDF. Design and Performance of Underground Excavations: ISRM Symposium — Cambridge, U.K., 3–6 September 1984. Next ... room and pillar-cut and-fill is one of those methods of mining.

ROCK MECHANICS APPLIED TO CUT AND FILL MINING IN …

higher cut and fill stopes than previously experienced in Australia and smaller pillars. Other changes since 1975 include the successful introduction of post pillar cut and fill mining at the King Island Scheelite mine; conversion of the C.S.A. Mine Cobar, N.S.W., from entirely cut and fill to longhole open stoping; adoption of a less

Overhand cut-and-fill mining | mining method | Britannica

24-7-2020· Other articles where Overhand cut-and-fill mining is discussed: mining: Cut-and-fill mining: In overhand cut-and-fill mining, the most common variation, mining starts at the lower level and works upward. In underhand cut-and-fill mining, work progresses from the top downward. In this latter case cement must be added to the fill to form a strong roof under which to…

Design Spans – Underhand Cut and Fill Mining

man-entry methods such as underhand cut and fill to be implemented under greater controlled spans resulting in a safe and economic alternative to conventional cut and fill mining, (Mah, 2003). A database of twelve (12) underhand cut and fill operations was compiled as part of this project through mine visits. The operations were

Post-pillar behaviour at deep levels in a copper mine ...

1-9-1995· The methods in use are: room and pillar; horizontal cut-and-fill; and post-pillar. The paper describes mechanical behaviour of post-pillars (PPs) at deeper levels (at approx. 950 m depth from surface) in post-pillar stoping. This method is a development from the horizontal cut-and-fill method.

Underground Mining Methods — New Pacific Metals

Cut and fill mining can be expensive, but this method allows for highly selective mining with less waste rock or low-grade ores mined-out (which keeps production costs low). It’s typically used in situations where the orebody dips steeply or is very irregular, which makes mechanized long-hole methods difficult to …

Underhand Cut and Fill Mining as Practiced in Three Deep ...

Underhand cut and fill mining methods are used at the Lucky Friday, Stillwater, and Galena mines in the western US in an effort to safely mine in difficult ground conditions and as a primary mining method where access below the ore is limited. The method has evolved at each mine to meet the unique situations associated with their milling procedure

Mitigation strategies for mining in high stress sill ...

MOB1 was converted from a post pillar cut-and-fill to a bulk operation, for MOB1 Sill Pillar recovery. From the beginning of cut-and-fill mining, it was recognised that at some point there would be a need to convert to a bulk mining method, as the mining front approached a diminishing sill pillar. The determination of the

(PDF) Underground mining Methods - ResearchGate

The method is similar to cut and fill mining with the ex ception that after being blasted, broken ore is left in the stope where it is used t o support the surrounding rock and as a platform from ...

Extraction and Backfill Scheduling in a Complex Underground ...

At a cut-off grade of nine percent, the material classified as ore diminishes (Box C). Because drift-and-fill min-ing would now excavate too much waste rock, a different approach is used. Box D shows material classified as ore at a cut-off grade of 12 per-cent. With most of the area now defined as waste, a targeted mining method is suitable.

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, …

Mitigation strategies for mining in high stress sill ...

MOB1 was converted from a post pillar cut-and-fill to a bulk operation, for MOB1 Sill Pillar recovery. From the beginning of cut-and-fill mining, it was recognised that at some point there would be a need to convert to a bulk mining method, as the mining front approached a diminishing sill pillar. The determination of the

Cut-and-fill mining | Britannica

25-7-2020· In mining: Cut-and-fill mining. This system can be adapted to many different ore body shapes and ground conditions. Together with room-and-pillar mining, it is the most flexible of underground methods. In cut-and-fill mining, the ore is removed in a series of horizontal drifting slices. When each slice… Read More

Underhand Cut and Fill Mining as Practiced in Three Deep ...

Underhand cut and fill mining methods are used at the Lucky Friday, Stillwater, and Galena mines in the western US in an effort to safely mine in difficult ground conditions and as a primary mining method where access below the ore is limited. The method has evolved at each mine to meet the unique situations associated with their milling procedure

Stoping methods - Indian Copper Complex - copper …

Post Pillar stoping. This method is a development from horizontal cut and fill, and is used in cases where the width and / or inclination of the orebody, or the condition of the hanging wall, or the concentration of rock stresses, are such that the ordinary method of roof bolting and fill …

Post-pillar behaviour at deep levels in a copper mine ...

1-9-1995· The methods in use are: room and pillar; horizontal cut-and-fill; and post-pillar. The paper describes mechanical behaviour of post-pillars (PPs) at deeper levels (at approx. 950 m depth from surface) in post-pillar stoping. This method is a development from the horizontal cut-and-fill method.

Underground Mining Methods and Equipment

The first section gives an overview of underg round mining methods and practices as used commonly in underground mines, including classification of underground mining methods and brief explanations of the techniques of room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, and block caving. The second

Design of crown pillar thickness using finite element ...

1-11-2017· There is hardly any study devoted for parametric analysis of crown pillar design in cut and fill stopes in deep mining conditions considering several parameters as mentioned above. This study precisely focused on scientific design of horizontal pillars (crown pillars) considering the changing rock mass conditions, variable width of the excavations and increasing depth of the excavations.

Description of mining methods (step by step)

Primary Mining Method Cut-and-Fill mining method. Information. Development in the ore of the upper and lower drift. The distance between the levels is 91 m (300 ft). Development of the service raise. Excavation of the stope. Two options: the first option consists in starting the stope from the level.

Major Mines & Projects - Mining Intelligence and News

The mining methods used at the Ontario Operations include cut-and-fill mining (CAF), mechanized cut-and-fill mining (MCAF), underhand cut-and-fill mining (UCAF), Post Pillar CAF (PPCAF), Sublevel Cave (SLC), Blasthole Stoping (BS), Vertical Retreat Mining (VRM) and Uppers Retreat Mining …