Ridgeway Deeps mining. The transformation of Ridgeway Underground – a sub-level caving operation – into a block cave involved a mine design and a process to ensure the rock 'naturally' caves progressively upwards by a gravitational force of the undercutting and removal of broken ore at the base of the block being mined.
This information, together with average operational mining costs, was used to create an economic model providing a real-time economic assessment of the draw point performance for SLC rings. ... Non-dilution draw method and its application in sub-level caving mines in China. In: H. Schunnesson, E. Nordlund, editor. Proceedings of the 5th ...
The Carrapateena Project is owned by OZ Minerals Limited through its wholly-owned subsidiaries. On May 2, 2023, BHP announced the completion of the OZ Minerals acquisition and implementation of the scheme of arrangement for BHP Lonsdale Investments Pty Limited, a wholly owned subsidiary of BHP Group Limited, to acquire …
Here extraction ratio R e is defined as (1) R e = W e W p where W e is the total weight of extracted materials including ore and waste rock and W p is total weight of materials planned to mine out from a ring (or an ore body or a mine). Table 1 shows that the number of last rings using lost-ore mining method from different production levels of two …
Sublevel shrinkage (SLSh) is an underground mining method similar to sublevel caving (SLC) but with continuous backfilling from the top. It features a top-down mining sequence with production drifts orientated in a longitudinal or transverse way in the orebody. Fan drilling and blasting is done from the production drifts, from where the ore …
A transverse SLC mining method was adopted for the deposit, with mining beginning at the 5330 level (approximately 580 m below surface; surface 5910 level) and advancing sequentially to depth. Sublevel spacing is 25 m between the 5330 level and 5130 level, and 30 m between the 5130 level and 5040 level.
Block Caving. 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.
Learn about the mining process of dividing a level into sublevels and using a bottom structure for ore removal. Find out the advantages, disadvantages, and applications of this method in China and other countries.
The cost of block cave mining is about 1/10 of the correspondent cost of conventional methods. The production rates can reach 30,000 to 100,000 tons per day. Moreover, drilling and blasting …
Then stopping proceeds with step-by-step blasting method. A caving overlying rock layer equal to 1.5–2 times the sublevel height must be maintained in the …
The block caving mining method has become increasingly popular in the last two decades. Meanwhile, Indonesia has several potential ore bodies which have not yet determined suitable mining methods. The references to block caving mining projects worldwide and the potency of metal deposits in Indonesia were reviewed to determine …
The K01 ore body will be mined by means of a sub-level caving mining method, with K01 producing 4 Mtpa (average of 3.5 million carats per annum). The K02 ore body will be mined by means of a modified sub-level caving mining method producing 1.9 Mtpa (average of 0.9 million carats per annum).
A traditional block caving mine considers the development of an undercut level that allows blocky or veined rock masses to fracture, fail, and unravel when the undercut area is large enough. Once caving initiates, the rock mass progressively fails when induced stresses overcome the rock mass strength and when fractured rock …
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 ... The deepest mining level at Kiruna mine today corresponds to about 1,080 m below ground. Malmberget
Outline of Topic 7: Longwall Longwall in coal Longwall in Hard Rock Sublevel Caving Characteristics of the ore body and mining method Development Production Equipments Used Block Caving Introduction Historical evolution of the method Condition deposit Principles of the method Methodology of block caving Basic issues of geomechanical to …
Underground mining methods such as sublevel caving (SLC), which can be applied in the hard rock mass, have become more popular because of their high potential production …
sublevel caving mines AD Campbell Beck Engineering Pty Ltd, Australia Abstract Sublevel caving (SLC) has previously been regarded as a high dilution and low recovery mining method requiring specific orebody geometry and rock mass conditions to be successful. Progress in the past 20 years at numerous operations has broken this misconception.
In the drift-and-fill method (see Fig. 1), the volume of backfills with 20%, 10%, and 0% cement content account for 16.7%, 41.65%, and 41.65% of the total backfill volume, respectively.It is estimated that the total mine fill cost is about 8.93 $/m 3, and from this total amount, 16.5% is the fill cost with 20% cement content.. The 10% and 20% cement …
The caving method is a large-scale mining method with low cost and high efficiency, widely used in China's metal mines. The ore output of the caving method takes up about 35% of the total ore output, and there is a tendency to increase.
Regional trends. Latin America provides the largest run of mine by volume among commodities considered, followed by Oceania. Africa and North America rank highest in terms of operating …
A key challenge with bulk mining methods such as block, panel or sub-level caving is that the designs are locked in from the development phase. There is little room for flexibility, and so learnings from early mining are hard to implement as the mine matures.
Sub-level caving is a highly efficient, top-down, underground bulk mining method. Recent developments in sub-level cave mining have advanced the …
operating costs. Sub-level caving is one of the methods with a high production rate applied for hard rock mining, and there are limited studies ... Sub-level caving mining cycle [13]. In the manual design methods, according to the ... of the existing equipment and the production commitment. That is why, in the previous studies, ...
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. …
Sub-level caving exploits a true caving technique, and its principle is based on the utilisation of the gravity flow of the blasted ore and caved waste rock, [1][2][3][4] [5] [6] and the fractured ...
Caving methods compared with other underground mining methods are low-cost methods and have high production rates. Sublevel caving is one of the main …
Large-scale sublevel caving, which is employed in both the Kiruna and Malmberget mines, is a resource-efficient and cost-effective method for large-scale …
Block caving requires a large amount of preparatory work, and before actual extraction of caved ore begins, considerable capital must be expended for this purpose. Thus, the estimated cost of preparatory work for a block containing 120,000 tons of ore at the Morenci Branch, Phelps Dodge Corporation, was $36,420.
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…