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PRINCIPLES AND APPLICATION OF SUBLEVEL CAVING IN METALLIFEROUS MINING THERE is a wide selection of various underground mining methods which can be adapted to the local conditions and to the particular requirements of the orebody concerned and of the surrounding areas. If optimum results as regards production are to be achieved, a number of
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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
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Aug 09, 2021 Production scheduling determines the most beneficial mining sequence over the life of a mine. Developing a schedule that meets all mining aspects can substantially reduce mining costs and increase profitability. Among all underground mining methods, the sublevel caving method is a common method with moderate development requirements, a high production rate, and a high
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The present invention relates to a method in mining by sublevel caving in which in a development phase, on one side of the orebody to be mined, i.e. the haulage wall side or, in case of an inclined orebody, preferably the foot wall side, are driven haulage drifts or shafts, for example haulageways inclined relative to the horizontal plane, and from said drifts or shafts are driven cross-cuts
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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
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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
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Description. This method is usually considered as an alternate to sublevel caving when a lower dilution method is needed and where the rock is fairly competent. The production for a mine using sublevel stoping can range from 15- 40 tons/employee-shift, while
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Abstract: LKAB has been mining iron ore with the sublevel caving mining method in northern Sweden for more than 60 years. 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
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Oct 25, 2017 The loss and dilution of ore by sublevel caving mining method is influenced by gravity flow principles of caved granular materials (rocks). Gravity flow of broken rock (muck) in dipping narrow veins is complex. By combined use of dimensional analysis and similitude studies in physical modelling coupled with numerical simulation, this paper reports results of a study of gravity flow of muck in
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Longwall mining. Longwall mining is a type of caving, applied to a horizontal tabular deposit such as coal. While block and sublevel caving are essentially vertically advancing metal mining methods, longwall mining is applied to relatively thin and flat-lying deposits – most often coal, but occasionally an industrial mineral such as trona
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Apr 03, 2017 The method is similar in some respects to sublevel caving—the ore is mined from the top downward by a series of slices, and the overlying strata cave and follow the mining downward with a mat intervening between the caved overburden and the ore beneath
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Caving methods are defined as those associated w ith induced, controlled, massive caving of the ore body, the overlying rock, or both. Th e exploitation workings in caving methods are designed to collapse, with intentional caving of the ore and/or host rock. The three major caving methods are: • Longwall mining • Sublevel caving
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Sublevel caving method without sill pillar is a kind of mining methods that present underground mine is most widely used.This method is compared with other mining methods, have simple in structure, flexibility is big, does not need pillar, and the mining preparation work amount is little, process for stoping is simple, rock drilling voluntarily, carrier loader efficiently easy to use, work
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Topic 7: Underground Mining Methods Longwall Sublevel Caving Block Caving Hassan Z. Harraz [email protected] 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors
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Mar 24, 2021 Historically sublevel caving has been perceived as a mining method that was prone to excessive dilution and poor recovery, and these issues negated the benefits. This negative perception, while probably not unwarranted in many cases, was rooted in practices based on early theories of rock flow which did not reflect reality ( Laubscher, Guest, & Jakubec, 2017 )
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Oct 23, 2014 In the design of production drifts, the Sublevel Caving uses theprinciples of gravitational flow ore dismantled, with subsequentcollapse of the host rocks. Approaches used to issue a gravitational flow:A) The physical-scale modelsB) field experiments in real scaleC) models mathematical / numerical
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Mar 16, 2017 Sublevel Caving. This method, otherwise referred to as sublevel drifts and back, caving, or sublevel slicing, resembles top slicing in that the orebody is worked from the top down, and the ore is taken out in horizontal slices. A block
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