The ore can be removed from the stopes as broken, and usually is; but often, especially in sublevel stoping, considerable broken ore can be accumulated in the stopes to form a reserve. Shrinkage stoping lacks the flexibility of other open-stope methods.
Backfilling is one of the most critical tasks for sublevel stoping mining methods with delayed backfill. Selection of the type of backfill is a significant component of backfill design at preliminary stage of mine development. This paper presents a state-of-the-art review of backfill practices with focus on backfill operations in North America.
Sublevel caving method with sill pillar is the mining process in which a level is divided into several sublevels, a bottom structure specifically used for ore removal is furnished at the lower part of each sublevel, and stoping of ore proceeds from the top sublevel to the bottom sublevel (Fig. 1).It is also called sublevel caving method with …
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 advantages are great flexibility and high mining efficiency ...
The principal mining methods have been summarized in a series of information circulars as follows: ... In sublevel stoping the ore is excavated in open stopes, retreating from one end of the stope toward an entrance at the other end (fig. 86) on each of a series of sublevels that are usually 20 to 25 feet apart vertically but may be 40 feet or ...
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 …
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 …
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 ... The schematic of sublevel open stoping method with double-drilling roadway. (A) section sketch of DSLOS mining method; (B) 3D model of the DSLSOS mining …
Although the general geometry is the same as for the room-and-pillar method, the generic name given the system is sublevel stoping. Blasthole stoping, vertical crater retreat, and vein mining also fall under this general heading. The shrinkage stoping method is a special form of sublevel stoping.
In present study, a network flow algorithm has been developed to optimize the stope boundary for the sublevel stoping method. The proposed algorithm is combined with the Mining Rock Mass Rating (MRMR) classification system presented by Laubscher (1993) to obtain the optimum size of the stopes subjected to the maximum stable width. …
PDF | Open stope mining is the most common mining method employed in underground, hard rock mines in Canada. ... the overall cost is reduced by 24% in the modified design with the single sublevel ...
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 …
In the proposed diamond layout sublevel open stoping (DLSOS) mining system, the workers drill from a supported drift outside the stope and the operation is …
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. …
The mining method used at Kanowna Belle is a sublevel open stoping operation designed to extract large massive and tabular orebodies (Villaescusa, 2014). In this paper, the analysis of level 9215 ...
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. …
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 ...
INTRODUCTION The sublevel stoping mining method is usually applied to a relatively steeply dipping, competent ore body, surrounded by competent wall rock. Ore is …
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 …
Various stoping methods are practised across the globe for the final extraction of mineral deposits. The selection of a feasible mining method for a mine is dependent on the technical suitability and economical profitability. The technical suitability of …
Among underground mining methods, sublevel stoping are a commonly used method in large-scale mining. It is a versatile and productive method that is …
Designing a sublevel stoping mine is a challenging task that requires determining the best layout in terms of economic value while respecting geomechanical constraints that limit the stopes' shape. Because of its relevance and challenging aspects, many authors have proposed methods to approximate or compute optimal stope …
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 …
Sublevel stoping: configuration method in stopes where the ore is detonated by drilling a fan. or parallel; large part of the ore is …
Together with room-and-pillar mining, it is the most flexible of underground methods. In cut-and-fill mining, the ore is removed in a series of horizontal drifting slices. ... it is possible to use a combination …
The gently inclined medium-thick orebody is generally viewed as difficult to extract. This paper presents a sublevel open stoping using long-hole with back filling method, particularly for inclined medium …
The basic application criterion of sublevel open stoping with subsequent backfill method is that the stope can remain stable before completing the mining …
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 ...