sub level stoping

This dissertation will explore the process followed in the design of a sub-level open stope (SLOS) by using examples of actual stopes scheduled to be in production between August 2006 and February 2007. The main objective is to give the reader an understanding into sub-level open stoping and the design process followed.

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 shape of a vertical slot. Instead, the trough serves as a horizontal slot, and only short lengths at the bottoms ...

1 Introduction. Sublevel stoping is an underground mining technique for mines used to extract massive or tabular, intermediate to very thick, steeply dipping orebodies with competent rock types [1, 2]. Stopes are underground excavations made by removing ore from surrounding rocks [3]. After a stope is drilled and blasted, the fragmented ore is ...

A review of the factors controlling stope wall behaviour such as excavation geometry, rockmass strength, induced stress, ground support, blast damage and drill drive layout …

A mining method involving overhand, underhand, and shrinkage stoping. Its characteristic feature is the use of sublevels. The sublevels are worked simultaneously, the lowest on a given block being farthest advanced and the subs above following one another at short intervals. The uppermost sublevel underneath the cover is partly caved.

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 ...

Sublevel stoping. Sublevel stoping is a mining method in which ore is blasted from diferent levels of elevation but is removed from one level at the botom of the mine. …

Sublevel stoping is an underground mining method capable of achieving a high production rate. In this method, the location of the stopes plays a pivotal role in project profitability. Therefore, through an optimization of the stope layout, the highest economic profit, can be added to the project.

Stoping Details. Preliminary development for sub-level stoping would be simple. A service raise is driven at about the center of the block and stope limits planned to leave a pillar around this raise. Sublevel drifts driven each way from this central raise will outline the. end limits of the ore shoot at various elevations.

Long hole open stoping is a form of sub-level open stoping which involves excavating ore in a series of horizontal or sub-horizontal levels, known as "stopes." In long-hole open stoping, a series of vertical or …

Stoping is the method used in mining operations of extracting ore and waste rock from underground mines that create openings called stopes. There are several types of stoping that vary based on the …

However, sublevel stoping method is generally applied in strong/competent country rock and orebodies that are steeply dipping (>45 degrees) allow the broken rock to flow by gravity down to the ...

A single lift design is the most basic arrangement for a sublevel stope extraction. The stope shape and size is constrained by two sublevels; the extraction and the drilling horizons. Access to the stope is via cross-cuts off a permanent access drive parallel to the. FIG 12 - Holes toeing into the stope boundaries.

Abstract. Sublevel stoping mining methods are very popular in Canadian metal mines since they enable maximum ore recovery due to pillar-less mining. Sublevel stoping mining methods are generally employed to extract steeply dipping tabular ore deposits characterized by relatively long strikes and having various thicknesses.

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 …

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 …

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). In sublevel caving and top-slicing, raises are put up at intervals of about 20 to 50 feet or more to the top of the ore body to serve as ore.

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 …

Sublevel stoping is an underground mining technique for mines used to extract massive or tabular, intermediate to very thick, steeply dipping orebodies with competent rock types [1, 2].Stopes are underground excavations made by removing ore from surrounding rocks [].After a stope is drilled and blasted, the fragmented ore is then …

EVALUACIÓN TÉCNICO-ECONÓMICA DE L MÉTODO. SUBLEVEL STOPING Y SU VARIANTE LBH. MEMORIA PARA OPTAR AL TÍTULO. DE INGENIERA CIVIL DE MINAS. ROCÍO ELSA ISABEL MORALES SÁNCHEZ. PROFESOR GUÍA ...

The sublevel open stoping with subsequent backfill divides the ore block into two parts: pillar and room. When the pillar remains permanent losses instead of being recovered, the goaf can be filled with non-cemented filling since the open stoping method generally requires the ore rock to be stable; when the pillar is required to be recovered ...

The sublevel open stoping using sub frame long hole with back filling mining method proposed in this paper is applicable to inclined medium thick ore body which is either stable as a whole ore body or with stable hanging wall. By using this method, if the footwall rocks contain part of the grade, the ore loss and dilution can be reduced in the ...

Are you curious about the Sublevel stoping mining method, commonly used in large scale mining? Check out this video.

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

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, …

Sublevel stoping is a mining technique where ore is removed from a stope by drilling and blasting sublevels longitudinally. Learn about the variations, the vertical spacing, the open spaces, the …

método e explotación sublevel stoping. El desarrollo de una mina subterránea ficticia basado en el método de explotación sub level stoping con la metodología BIM, tiene como propósito el poder dar a conocer y experimentar con una metodología que se ha abierto camino y ha tomado protagonismo en el área de la construcción, tanto así que en …

The sublevel stoping mining method is mainly used to mine the inclined to steeply inclined, thin to medium-thick ore bodies, requiring at least moderate stability of the ores and surrounding rocks.

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%).