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Sublevel open stoping: design of the O640, L651 and N 659 sub level open stopes in the 3000 orebod y of the Mount Isa copper mines, Queensland , Australia. Department of Mining, University of ...
used by most mining houses, in which a sublevel stoping geometry is chosen for a particular mining method, equipment availability, and work force experience. Page 8/24. Read Online Geotechnical Design For Sublevel Open StopingSummarizing state-of-the-art practices encountered during his 25+ years of experience at industry-leading underground mines ... Geotechnical Design for Sublevel Open ...
10/02/2018 Black Diamond Drilling Services AustraliaDatabase
DEVELOPMENT Access to a sublevel open stope mine is gained by a slope or shaft that is normally sunk in the footwall of the ore zone, away from any possible effects from blasting or other production operations in the stoping process. Main level interval is selected and usually varies from 45.7 to 121.9 m (150 to 400 ft), depending on the vertical extent of the ore body, the number of ...
Lece mine utilizes sublevel stoping mining method with drilling and blasting as main excavation technology. Drill holes (75mm) are drilled in ring/fan pattern from the level
affect the method chosen or the mine design_, ... 40 DESIGN AND OPERATION OF CAVING AND SUBLEVEL STOPING MINES Data Required The most important data required for selec tion of a mining method and initial mine layout are geologic sections and level maps, a grade model of the deposit, and rock mechanics char acteristics of the deposit, footwall, and hang ing wall. Much of this data can be ...
The mine is currently operating at 1150mL using sublevel mining method for copper ore bodies extraction. It intends to descend to 1500mL. There are various critical factors that influence a safe and economic design and dimensioning of a sublevel stoping method for underground extraction of metalliferous deposit. However, several mining operations maintain the same stope dimensions for all
It is the first comprehensive work on one of the most important underground mining methods worldwide, presenting 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 availability, and work force experience. Summarising state-of-the-art practices encountered during his ...
INTRODUCTION The sublevel stoping mining method is usually applied to a relatively steeply dipping, competent ore body, surrounded by competent wall rock. Ore is produced by drilling and blasting longholes, which can range from 50 mm (2 in.) to 200 mm (7% in.) diam, with lengths up to 90 m (300 ft). Longholes can be inclined in any direction, but the ring or pattern usually forms a plane, and ...
04/12/2019 Sublevel Stoping (SLS) is often regarded as a mining method for steeply dipping deposits in competent rock. The method involves extracting the ore between the sublevels. The sublevele intervals varies from mine to mine. The operation includes long hole drilling and blasting from the drives. The method involves a slot being created at the end of the orebody. Long hole drill rigs are used to ...
mining design engineer in choosing the most economical drilling system when designing a stope. Keywords: Sublevel stoping, ring drilling, parallel drilling, DTH drilling machines, drilling and blasting pattern, stope height 1. Introduction It is obvious that, ore
The mining industry continues to face the problem of depleting grades and the subsequent significant variation in economic, environmental and technological characteristics have been observed. This has raised the importance of the production
DEVELOPMENT Access to a sublevel open stope mine is gained by a slope or shaft that is normally sunk in the footwall of the ore zone, away from any possible effects from blasting or other production operations in the stoping process. Main level interval is selected and usually varies from 45.7 to 121.9 m (150 to 400 ft), depending on the vertical extent of the ore body, the number of ...
22/10/2014 Sublevel stoping..Underground mining methods 1. 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. Permission of the author and publisher is required for any other usage.
affect the method chosen or the mine design_, ... 40 DESIGN AND OPERATION OF CAVING AND SUBLEVEL STOPING MINES Data Required The most important data required for selec tion of a mining method and initial mine layout are geologic sections and level maps, a grade model of the deposit, and rock mechanics char acteristics of the deposit, footwall, and hang ing wall. Much of this
optimization model for open stoping mining method. The stope design model maximizes Net cash flow of the stope while adhering to the stope constraints. The methodology considers open stoping sequence, in which every block is moved towards the cross-cuts at the lower level. In this thesis, stopes are designed to maximize the undiscounted cash flow from the stope after satisfying stope height ...
The mine is currently operating at 1150mL using sublevel mining method for copper ore bodies extraction. It intends to descend to 1500mL. There are various critical factors that influence a safe and economic design and dimensioning of a sublevel stoping method for underground extraction of metalliferous deposit. However, several mining operations maintain the same stope dimensions for all
The mining industry continues to face the problem of depleting grades and the subsequent significant variation in economic, environmental and technological characteristics have been observed. This has raised the importance of the production
INTRODUCTION The sublevel stoping mining method is usually applied to a relatively steeply dipping, competent ore body, surrounded by competent wall rock. Ore is produced by drilling and blasting longholes, which can range from 50 mm (2 in.) to 200 mm (7% in.) diam, with lengths up to 90 m (300 ft). Longholes can be inclined in any direction, but the ring or pattern usually forms a plane, and ...
22/10/2014 Sublevel stoping..Underground mining methods 1. 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. Permission of the author and publisher is required for any other usage.
04/12/2019 Sublevel Stoping (SLS) is often regarded as a mining method for steeply dipping deposits in competent rock. The method involves extracting the ore between the sublevels. The sublevele intervals varies from mine to mine. The operation includes long hole drilling and blasting from the drives. The method involves a slot being created at the end of the orebody. Long hole drill rigs are used to ...
01/03/2013 A new algorithm to optimize stope design for the sublevel stoping mining method is described. The model is based on a cylindrical coordinate defined around the initial vertical raise. Geotechnical constraints on hanging wall and footwall slopes are translated as precedence relations between blocks in the cylindrical coordinate system. Two control parameters with clear engineering
Lece mine utilizes sublevel stoping mining method with drilling and blasting as main excavation technology. Drill holes (75mm) are drilled in ring/fan pattern from the level of sublevel drift using hydraulic hammer. ANFO is used as main explosive, while initiation is done using detonating cord and electric detonators. Main problem that mine is facing is oversized fragments that require ...
Table of ContentsFlexibilityPreparatory DevelopmentPercent Recovery of Ore and DilutionCost of Stoping The foregoing descriptions and discussion of the different stoping methods and practices and the accompanying tabulated data indicate the conditions under which they may be applied and serve as a basis for comparing them. Stoping costs will be presented later. Direct comparisons of the ...
Figure 3 - Sublevel open stoping method (Atlas Copco, 2007) 3.2. Bighole stoping method Bighole stoping is an up-scaled variant of sublevel open stoping, using longer, larger-diameter DTH blastholes, ranging from 140 mm to 165 mm. Blast patterns are similar to sublevel open stoping, but with holes up to 100 m long. However, the risk of
optimization model for open stoping mining method. The stope design model maximizes Net cash flow of the stope while adhering to the stope constraints. The methodology considers open stoping sequence, in which every block is moved towards the cross-cuts at the lower level. In this thesis, stopes are designed to maximize the undiscounted cash flow from the stope after satisfying stope height ...
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