22/10/2014· Drawpoints are basic elements of development methods used in sublevel stoping, sublevel caving, block caving, shrinkage, VCR and others. Can be positioned: in sublevels production when using sublevel caving na base level or ore body, when it is used block caving, sublevel stoping and VCR. Prof. Dr. H.Z. Harraz Presentation sublevel stoping 31
The three major caving methods are: Longwall mining Sublevel caving Block caving Longwall mining is used in horizontal, tabular deposits mainly coal, while the others have applications in inclined or vertical, massive deposits, a lmost exclusively metallic or nonmetallic.
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
14/04/2020· Sublevel caving is often used in conjunction with surface mining. Sublevel caving extracts the ore via sublevels, which are developed in the orebody at regular vertical spacing. Each sublevel features systematic layout with parallel drifts, along or across the orebody. In the wide orebody, sublevel drifts start from the footwall drive, to continue across, reaching the hanging wall. In the
Sublevel caving is a relatively safe mining method since the operations take place in small areas at a time and are highly mechanized. The uniformly distributed nature of generally sublevel nature of drifts aids in the safety of this mining method.
25/06/2010· In sublevel caving, ore is developed from a series of sublevels spaced at regular intervals throughout the orebody. Mining begins at the top of the orebody. A series of ring patterns is drilled and
Table of ContentsFactors Affecting Choice of MethodReview of Stoping MethodsUnderhand Stoping Mining MethodOverhand Stoping MethodLongitudinal Back, Flat Back Mining MethodLong Wall StopingmMining MethodRill Cut Stoping MiningSaw Tooth Back StopingShrinkage StopingMiningbination StopingSide StopingBreast StopingSublevel StopingSquare Set StopingFilling
22/03/2007· A method of underground mining operation.
10/02/2018· Black Diamond Drilling Services AustraliaDatabase
14/04/2020· Description of sublevel caving method An underground mining method used in large, steeply dipping orebodies where the wall rock is of anpetent nature. Parallel drives are developed in the ore on equally spaced levels. The ore is then drilled and blasted using longholes between levels, often in a circular or fan pattern, on retreat.
Sublevel caving SLC is a mass mining method based upon the utilisation of gravity ﬂow of blasted ore and caved waste rock . The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves under the action of mine induced stresses and gravity . The caved waste from the overlying rock mass ﬁlls the void created by ore
Specific examples of cave mining techniques include block caving, panel caving, inclined drawpoint caving, cut and fill mining, shrinkage stopping, sublevel longhole mining, room and pillar mining and front caving. Cave mining is typically used to mine copper, copper gold, iron and molybdenum. It can also be used in the extraction of kimberlite and lamproite in the mining of diamonds. Block
The sublevel caving SLC mining method has evolved over the last 100 years. The method was first used in the early 1900s in soft iron ore mines in Minnesota and Michigan, USA Hartman and Mutmansky, 2002 . It represented an evolution from top slicing, but was initially highly labour intensive and required heavy timber support Hartman and Mutmansky, 2002. Only part of the ore was blasted
Specific examples of cave mining techniques include block caving, panel caving, inclined drawpoint caving, cut and fill mining, shrinkage stopping, sublevel longhole mining, room and pillar mining and front caving. Cave mining is typically used to mine copper, copper gold, iron and molybdenum.
1. Introduction Sublevel caving SLC is a mass mining method based upon the utilisation of gravity ﬂow of blasted ore and caved waste rock. The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves
23/10/2014· Sublevel Caving in the process of fragmentation of the ore is done by explosives induced caving and the ore is detonated with drilling in ascending fans. The sterile overlying should crumble as the ore is removed.
Advantages of Sublevel Caving selective mining of weak medium strength ore bodies in weak rock. small ore bodies can be mined. highly mechanized. flexible can change to mechanized sublevel open stoping. productivity is reached quickly. multiple operating faces at the same time. ore is mined rapidly once fragmented . it can be used in wet and sticky ores. no pillars left behind. Disadvantages
In sublevel caving, ore is developed from a series of sublevels spaced at regular intervals throughout the orebody. Mining begins at the top of the orebody. A series of ring patterns is drilled and blasted from each sublevel. Broken ore is mucked out after each blast and the overlying waste rock caves on
cave mining handbook page 1 of 138 contents page 1.0 introduction 2 2.0 geological investigations 4 3.0 rock mass classification 9 4.0 geotechnical investigations 11 5.0 mining limits 14 6.0 caveability 16 7.0 air blasts 26 8.0 rockbursts 29 9.0 mud flow water 33 10.0 primary fragmentation 39 11.0 secondary fragmentation 42 12.0 drawpoint / drawzone spacing 45 13.0 undercutting 48 14.0 ore
14/06/2019· Sublevel caving There are several variants of the sublevel caving mining method among which variant applied in Kiruna mine in Sweden is best known. This mining method can be applied to numerous types of ore bodies with inclination from horizontal to vertical. If ore body is narrow its inclination should be steep in order to apply the method.
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.
Sublevel Mining Longwall Mining Sublevel and Longhole Open Stoping Block and Panel Caving VCR Stoping Cut and Fill Stoping 1.1.2 History of Block Caving. Late 19th century: precursor to modern block caving developed in the Pewabic iron ore mine, Michigan, USA
02/10/2013· Sub level caving is a highly efficient, top down, underground bulk mining method. Recent developments in sub level cave mining have advanced the understanding of the technique and its production performance, which allow it to now be considered as a highly viable alternative to open stoping and, in some cases, even to block caving. In addition to a low unit cost, sub level caving offers the
Schematic layout for sublevel caving after Hamrin, 1982 DEFINITION: A mining method which is applicable to low grade near vertical metallic or nonmetallic deposits. Mining progresses downwards while the ore between sublevels is broken overhand with long hole uppers fan holes. The overlying waste rock hangingwall or capping caves into the void created as the ore is drawn off. Mining is