Stoping | Underground Excavation, Rock Blasting & Ore …
Stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore. Stoping is practiced in underground mineral mining when the surrounding …
Metal Mining Stoping Methods | PDF | Explosive Material
Metal Mining Stoping Methods - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. The document discusses the cut-and-fill stoping mining method. It involves excavating slices of ore and filling the mined out area with a backfill material for ground support. The method involves cycles of drilling, blasting, mucking, ground support installation, …
v117n3a8 Narrow-reef mechanized mining layout at …
best mining practices. The stoping method that will be used is an on-reef scattered breast mining system, utilizing ULP mining equipment that has been designed to operate in stoping widths of 0.90–1.20 m. It is important to note that the same mining method can be conducted using XLP mining equipment, which is operating in stoping
9.3.2: Shrinkage Stoping | MNG 230: Introduction to Mining …
9.3.2: Shrinkage Stoping. Shrinkage stoping is a vertical stoping method, conducted in a vertical or near-vertical plane, and at an angle greater than the angle of repose of the broken ore. A defining characteristic of shrinkage stoping is that most of the blasted (broken) ore remains in the stope to support the hanging wall and footwall. However, when ore is broken, for example by …
Underground metal mining methods | PPT
The document discusses underground metal mining methods. It describes operations like exploration, development, and mining of ore from a stope. Stoping methods are classified based on support as naturally supported, artificially supported, or caved stopes. Naturally supported methods include room and pillar mining and sublevel stoping.
Mining Methods
Shrinkage stoping is another highly selective mining method designed for mining narrow steeply dipping veins. Similarly to cut-and-fill method, shrinkage stoping starts from the bottom of the ore body and advances upward excavating the ore in horizontal slices (Fig. 2.5 ).
Breasting Mining Method
The advantages of the breasting mining method are the small development workload, simple stoping, good ventilation conditions, low wood consumption, low direct mining costs, and strong adaptability to variations of ore body shape and inclination angle.
9.3.1: Room and Pillar Method | MNG 230: Introduction to Mining …
9.3.1: Room and Pillar Method. Room and pillar mining is arguably the most important underground mining method in practice today. The majority of underground production comes from room and pillar mines, and the majority of underground mines, by number, employs the room and pillar method! Think about that!
Open stoping | mining | Britannica
Learn about this topic in these articles: methods of stoping. In stoping …the operation is known as open stoping. A common open-stoping method is room-and-pillar mining, in which pillars of ore are left standing to support the rock over a flat-lying ore body.
Stoping Mining Methods
Various methods of stoping have been devised for extracting the ore safely and economically from deposits of different types, and a nomenclature has been developed for use in referring to the various methods.
Ore Dilution & Recovery in Mining
The stoping method may affect the percentage of ore minerals recovered in the ore-dressing plant, especially where certain sulfide ores are concentrated by flotation. Thus, a stoping method that permits immediate removal of the ore after it is broken so as to preclude its partial oxidation before it goes to the mill may be desirable or necessary.
9.3.2: Shrinkage Stoping | MNG 230: Introduction to Mining …
Shrinkage stoping is a vertical stoping method, conducted in a vertical or near-vertical plane, and at an angle greater than the angle of repose of the broken ore. A defining characteristic of …
Stop Mining Method
Two common stoping methods commonly used to mine vertical deposits are shrinking stoping and sub-level stoping. Shrinking stoping gets its name from the phenomenon whereby if we take a volume of rock and we break it up, the volume of the broken rock is larger than the volume of the intake rock that we start up with. ...
Sublevel stoping..Underground mining methods | PPT
8. Characteristic of Sublevel Stoping Method Advantages Moderate to high productivity per man-shift Moderate cost of mining (relat = 0.4.) Moderate to high production rate Suitable for mechanization Low exposure to unsafe conditions Possibility of simultaneous unit operations Average recovery (75%); Moderate dilution (up to 20%).
Underground Mining Methods
Sublevel Stoping. Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom of the mine. Before mining begins, an ore pass is usually drilled from a lower to a higher elevation. Jumbos selectively drill holes into the roof of the drift and fill them with explosives.
(PDF) Design and dimensioning of sublevel stoping for …
These stoping-based mining methods rely on diving the orebody into stopes for ore production and have already become amongst the most common methods in modern underground mining.
Current and Future Stope Design Methods for …
Importance of Stoping-Based Methods in Underground Mining. Stoping involves using pillars or artificial supports in mining operations, as opposed to unsupported methods. Stoping has advantages for the mining …
9.3.3: Sublevel (Open) Stoping | MNG 230: Introduction to Mining …
9.3.3: Sublevel (Open) Stoping. If we had a stronger and more competent host rock, we could dispense with the need to keep ore in the stope to support the hanging wall, as we do VCR mining. Indeed, such deposits do exist, and when they do, …
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 m to 12 m (33 ft to 39 ft) holes drilled between the levels to break the ore leaving ...
Topic 6: Underground Mining Methods Cut-and-Fill stoping …
Cut-and-fill stoping is a selective mining method primarily used in underground mining for high-grade vein deposits. The technique involves extracting ore in horizontal slices and backfilling the voids with various materials to support the mine structure. Although it is an expensive method, its benefits include low ore loss, minimal dilution ...
9.4.1c Stull Stoping | MNG 230: Introduction to Mining …
9.4.1c Stull Stoping. This method is designed for rock masses that are weak but somewhat competent – not as weak to require square sets, but not sufficiently competent to use cut and fill. ... small overshot loaders, and so on. Needless to say, as a principal mining method, this one has also disappeared. Figure 9.4.6 Stull stoping in an ...
Shrinkage Stoping Mining Method
The stoping work of the shrinkage mining method is conducted in layers from bottom to top with layer height of 2–3 m generally. The stoping face is mostly trapezoidal, and the stoping in each layer includes rock drilling, blasting, ventilation, local ore drawing, flatbacking flat fields, and heightening the square-set raise in the absence of rib pillar.
Analyzing Stability Conditions and Ore Dilution in Open Stope Mining
Ore dilution is a fundamental problem for the production process in underground mining operations. Especially in open stoping methods of underground mining, the continuous estimation, monitoring ...
Underhand stoping method | PPT
The document describes the underhand stoping mining method. Underhand stoping is applicable for ore bodies that are moderate to weakly strong, located 100-400 meters deep, and 3-10 meters thick. It involves developing levels in the ore body and working a stope downward between two levels, leaving a crown pillar for support.
4.3.2: Underground Mining Methods | MNG 230: Introduction to Mining
Shrinkage stoping. Shrinkage stoping is used to recover steeply dipping orebodies when the ore and host rock are reasonably competent. A stope, i.e., a large section of the mine where active production is occurring, is mined, but the broken ore is not removed, but rather is left in place to support the walls of the stope until the time when all of the broken ore will be removed.
Underground Stoping Practice & Methods
When mining is done on the retreat, the stoped-out areas can be abandoned and, unless movement and subsidence must be prevented, can be allowed to cave. A few of the principal variations of stoping methods not heretofore …
Types of Underground Mining Method Comparison
Underhand Stoping Mining Method. The method of underhand stoping in which the ore is drawn to the level above (B, Fig. .1), is called Cornish stoping. It finds application only when it is necessary to mine a lens of good ore below a level and it is not practicable or financially possible to do the necessary development to come up from ...
Design of stoping parameters and support system for longhole stoping
Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing. It encompasses advantage of Faster Stope Production ...
Topic 9: Mining Methods Part V- Underground Mining
A common method of mining such vertical ore bodies is stull stoping. The development of the infrastructure for the stoping methods is time-consuming, costly, and complex.
(PDF) Open Stope Mining in Canada
Open stope mining is the most common mining method employed in underground, hard rock mines in Canada. It is characterised by relatively small, single lift stopes (20,000 to 100,000 tonnes), and ...