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1.1 Sub Level Caving The sublevel cave (SLC) mining method is suited to a variety of orebody shapes and ground characteristics. It has particular advantages in low grade ore. Stobie Mine is a noteworthy Vale operation using SLC mining. SLC mining is suited to steeply dipping ore, as well as flatter lying orebodies having a large vertical dimension.
Jul 14, 2014· Sequence of Development Development for block caving is typically extensive and expensive, but generally less so than that for sublevel caving on a unit cost basis. Mine level development commences from the shaft station in the usual way, providing for high speed, high capacity haulage and simple ventilation airflow capacity.
Other articles where Sublevel caving is discussed: mining: Sublevel caving: This method owes the first part of its name to the fact that work is carried out on many intermediate levels (that is, sublevels) between the main levels. The second half of the name derives from the caving of the hanging wall and.
Sublevel caving techniqueSimplicity and low cost are the essence Development volume to prepare sublevel caving is extensive, compared to other mining methods However, development is mainly drifting to prepare sublevels Drifting is a simple and routine job for the mechanised mine Development of sublevels is done efficiently, in.
Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies. Soft rock mining refers to excavation of softer minerals such as salt, coal ...
a new mine planning tool for sub level caving mines. cost of mining equipment for sub level caving mining. A New Mine Planning Tool for Sub Level Caving Mines This course is for anyone concerned with block caving . Get Price
Sub-level caving. This method owes the first part of its name to the fact that work is carried out on intermediate levels (that is, sub-levels) between the main production levels. It follows the same basic principles as the block caving mining method, but the caves are smaller in size and not as long lasting.
Dec 12, 2018· Block-caving copper mining methods and costs at the Miami mine, Miami Copper Company, Gila County, Arizona (1965) Hardwick, W. R. U.S. Dept. of the Interior, Bureau of Mines PDF; Empirical investigation and characterization of surface subsidence related to block cave mining (2013) Woo et al. International Journal of
Advantages of Block Caving vs. Sublevel mining cost is less per ton. less development work per ton. larger daily output. ventilation is easier. Why consider sublevel caving over block caving when gravity caving is in doubt and limited fracturing of the ore would give large blocks:
Block caving is an extreme case of sublevel caving in which instead of a back of ore 5 to 10 ft. thick, one 50 ft. thick is undermined and allowed to cave. The method is illustrated in Fig. 7. After the bottom of the block, or panel, is cut up into pillars by drift's and cross drifts, the pillars are robbed, and then the remaining stumps are ...
Sublevel Mining. Longwall Mining. Sublevel and Longhole Open Stoping. Block and Panel Caving. VCR Stoping. Cut and Fill Stoping. 1.1.2 History of Block Caving. Late 19th century: precursor to modern block caving developed in the Pewabic iron ore mine, Michigan, USA
all considered as mining methods. Sub-level open stoping was introduced in a trial mining block but, after failure of the method due to premature caving ofthe sill, the mine reverted to mechanized block caving in 1989, a method that is still being used. 5. Mechanised block cave mining Block caving is generally considered the lowest cost ...
mining, panel caving offers low operating costs, and lower development costs due to its progressive approach. SuB-LeVeL CAVING Sub-level caving is sometimes used where large open pit mining operations transition to underground extraction methods, although it is often used for independent underground projects too.
Jun 25, 2010· Sublevel caving techniqueSimplicity and low cost are the essence Development * Significant. Almost 20% of the ore is mine during development * Sublevels are .
Resolute Mining has reported the results of an updated prefeasibility study (PFS) for underground mine development below its current open-pit Syama gold mine in southern Mali. The updated PFS assumes development of a large-scale sublevel caving operation and confirms that an early move to underground mining in 2016 will produce robust economic returns.
possible. Historical data at Shabanie mine, a Zimbabwean sub-level caving underground mining operation, confirms this practice. However, the high cost of underground development means that the luxury of large buffer mineral reserves cannot be justified. Furthermore significant increases in the costs .
Both TWP/MP and GHD consider that block caving may be a suitable mining method to extract the... in total costs of US$307M. Additional changes to the project can also be made... The cave footprint, the overall column height and the extraction level for lift 1 and..... Compilation of mine equipment and manning schedules.
Many mining companies combine costs of general and stope development for accounting purposes, whereas others include stope-development costs as a part of the stoping cost. In this discussion, distinction is made between general development and stope preparation. ... Sublevel stoping, sublevel caving, top-slicing, and block-caving require more ...
Mining rates will gradually build up over the first half of 2019 and are expected to reach nameplate capacity of 200,000t per month by the end of June 2019. Sub-level caving is an advanced and highly efficient low-cost bulk underground mining method that provides early access to ore. Mining commences at the top of the deposit and develops ...
Block caving is the lowest cost underground mining method but it has relatively high risks and a high up-front capital and development cost. It has application to large, often lower-grade orebodies where high production rates can provide good returns on the investment. However, it has a range of technical risks that are peculiar to block...
Throughout the years, LKAB has improved this mining method to stay competitive in a tough international iron ore market. Improvements in drilling and blasting technology have helped LKAB increase the scale of sublevel caving and therefore decrease its mining costs in development. Today, sublevels at LKAB are up to 30 m high.
Oct 02, 2013· Source: Mining Magazine, September 2013. Sub-level caving is a highly efficient, top-down, underground bulk mining method. Recent developments in sub-level cave mining have advanced the understanding of the technique and its production performance, which allow it to now be considered as a highly viable alternative to open stoping and, in some cases, even to block caving.
methods have been tried, but today, sublevel caving is the only one used. One of the key factors affecting the mining costs in sublevel caving is the amount of development work for production. This cost is very dependent of the sublevel height. As the sublevel height increases, the amount of development work necessary for production decreases.
Development in Sublevel Caving The method requires significant development, being part of ore (in high producing mines, 6% of the total ore mined comes from developing).
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