Sublevel stoping is one of the most successful mining methods in respect of higher production, mechanization and safety. The method is a cost-effective and safe mining solution for steeply dipping vein deposits where high-level mechanization can be adopted. Progress of stope development and rate of production drilling are vital aspects …

The mining methods evaluated with AHP are: room and pillar; sublevel open stoping; vertical crater retreat; cut and fill; shrinkage mining; sublevel caving and block caving. Mining methods can be classified based on the degree of support offered to generated excavation and magnitude of displacement (Brown, Citation 2004). Room and pillar ...

Mining continues upwards towards the sur-face until the orebody is depleted. 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.

The first comprehensive work on one of the most important underground mining methods worldwide, Geotechnical Design for Sublevel Open Stoping presents topics according to the conventional sublevel stoping process used by most mining houses, in which a sublevel stoping geometry is chosen for a particular mining …

It is a mining method that uses the sublevel open stoping method to stope the room or pillar and to fill the goaf completely after the stage stoping is completed to support the surrounding rock, creating conditions for the stoping of the rib pillar or the surrounding stopes. The sublevel open stoping with subsequent backfill divides the ore ...

The ore body can be efficiently mined in large volumes and with higher productivity using larger underground equipment and the bulk mining methods. There are several methods for bulk underground mining, the most common being block caving, long hole open stoping, sublevel open stoping, sublevel caving and vertical-crater-retreat. …

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 …

The mine is currently operating at 1150mL using sublevel mining method for copper ore bodies extraction. ... the overall cost is reduced by 24% in the modified design with the single sublevel ...

Keywords: sublevel stoping, mine design, gravity flow, ore dilution. Current design practices for sublevel stoping. Sublevel stoping (SLS) is a method that can be implemented as sublevel open stoping (SLOS) or …

Sublevel stoping, sublevel caving, top-slicing, and block-caving require more stope preparation before ore extraction can begin. In sublevel stoping (a form of open stoping), ore chutes, manway, and "starting raises" must be put up and one or more drifts driven on each sublevel (fig. 60, B).

method of underground mining. In 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…. mining. Table of Contents.

The DLSOS stoping method is an adapted sublevel open stoping method with backfill. In this method, the stoping sequence is from bottom-up, and therefore, the blasted ore is mucked under the protection of the upper stope pillar. The muck is not affected by the weight of overlying strata, and the stress is not transferred.

Abstract. The first comprehensive work on one of the most important underground mining methods worldwide, Geotechnical Design for Sublevel Open Stoping presents topics according to the ...

Sublevel stoping: configuration method in stopes where the ore is detonated by drilling a fan or parallel; large part of the ore is …

Sublevel open stoping is a highly mechanized mining method utilizing a wide range of equipment for drilling and mucking. Typically production drilling is carried out by high …

Since the 1970s, the sublevel stoping mining method (Fig. 1) has been an open stope mining method with relatively advanced technology, high mechanization and …

After blasting, loading and hauling proceeds in the same way as sublevel stoping. The optimal KDIs for sublevel stoping and VCR are shown in Table 14. Images of both mining methods are shown in ...

In sublevel stoping, shorter blastholes are drilled from sublevels located at shorter vertical intervals along the vertical stope. A fairly typical layout is shown in the figure. In vertical retreat mining the stope does not take the …

Longwall and caving methods are distinguished from other mining methods by the fact that the near-field rock undergoes large displacements so that mined voids become self-filling. In caving ...

Square-set stoping. C. Caved stopes. 7. Caving (ore broken by induced caving). (a) Block caving; including caving to main levels and caving to chutes or branched raises. (b) Sublevel caving. 8. Top slicing (mining under a mat that, together with caved capping, follows the mining downward in successive stages).

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 ...

Konkola Copper Mine's Number 4 Shaft is a trackless underground mine applying sublevel open stoping (SLOS) mining method. Number 4 shaft wants to increase ore production from 1 million metric tonnes per annum …

Many authors have researched the problem, proposing different methods to approximate or compute optimal stope designs or provide some guidelines for a manual design of the mine.In this paper, we present an optimization model to determine the optimal layout of an underground mine extracted by sublevel stoping method.

The first comprehensive work on one of the most important underground mining methods worldwide, Geotechnical Design for Sublevel Open Stoping presents topics according to the conventional sublevel stoping process used by most mining houses, in which a sublevel stoping geometry is chosen for a particular mining method, equipment …

The short-hole shrinkage or sublevel chamber-mining methods are usually adopted for mining orebodies with a 30–50˚ incline and less than 10 m in vertical thickness [6–8]. Both ... triangular area will similarly occur if the short-hole stoping method is used, as is shown in Areas 2 & 4 in Fig 1. During the recovery process, the waste rock ...

The sublevel stoping is an excavation method that consists of dividing the deposit into several vertical sections, to empty the basic unit of mining exploitation, called mansion. The mineral that is collected in the mine is accumulated in trenches placed at the foot of the mansion, and from there the extraction begins applying different ...

The name of this method derives from this drawing off or shrinkage of the stope. A modern and important variant of this method is known as vertical crater retreat (VCR) mining. A few examples of commodities mined by this method include iron and palladium. Watch this video (3:01) created by Atlas Copco demonstrating sublevel stoping mining method.

Among underground mining methods, sublevel stoping are a commonly used method in large-scale mining. It is a versatile and productive method that is primarily used for steeply deeping orebodies with regular shape, defined ore boundaries and competent ore and host rock. The sequence and extraction of stopes is critical in …

Desventajas. Algunas de las desventajas del sublevel stoping son las siguientes: – Se trata de un método no selectivo. Esto quiere decir que, necesariamente, el cuerpo mineral debe tener una silueta regular; en otros casos el método no es viable. – El método es ineficiente cuando los ángulos de inclinación no son pronunciados.

MINE 411 Underground Mining Methods & Equipment Instructor: Prof. Raymond S. Suglo 2 Fig. 2 Ring Drilling Machines positioned in Sublevel Drives Where ring drilling is applied, the cross-section of the stope is longhole drilled from the sublevel drifts. The drill pattern is matched to the contours of orebody. It can consist of holes drilled in part of, or a …