63 LEVEL TO THE PIPE
After various methods were examined with safety and speed being the major consideration, two feasible long-hole methods of extraction of the crusher chamber were identified.
اقرأ أكثر
Excavator attachments | Epiroc US
Another kind of underground rock excavation is construction (tunneling) where the main aim is to develop underground tunnels, shafts, chambers and passageways for civil engineering use. Depending on the rock properties Hydraulic Breakers or Drum Cutters can be used as a primary excavation method or in combination with Drilling and Blasting.
اقرأ أكثر
Data analysis solutions to improve blasting efficiency in mining
An innovative blasting and mining methods for a large underground crusher excavation mine, the Freeport Deep Ore Zone (DOZ) in West Papua, Indonesia is presented.
اقرأ أكثر
Going underground: Jaws or a primary gyratory?
Excavating for and assembling a primary crushing plant underground is complicated and costly, so careful planning really pays off. In this series, we review different aspects of plant design, including capacity, …
اقرأ أكثر
(PDF) Underground excavation methods
Underground excavation methods. Discover the world's research. 25+ million members; 160+ million publication pages; 2.3+ billion citations; Join for free. Public Full-text 1.
اقرأ أكثر
(PDF) Geotechnical analysis and ground support selection for …
PDF | On Jan 1, 2022, Glenn Sharrock and others published Geotechnical analysis and ground support selection for the Oyu Tolgoi Crusher Chamber #2 | Find, read and cite all the research you need ...
اقرأ أكثر
; Vertical section through the crusher excavation along the …
Download scientific diagram | ; Vertical section through the crusher excavation along the chamber, showing stress concentrations. from publication: Innovative Mining Method, Related Support ...
اقرأ أكثر
Techniques in Underground Mining
Very high raises can be excavated with the raise climber with safety much improved over the manual method. Raise excavation, however, remains a very hazardous job. ... Room-and-pillar is one of the principal underground coal-mining methods. Figure 5. Room-and-pillar mining of a flat orebody ... a coarse crusher may be installed below the ...
اقرأ أكثر
Hydraulic attachment tools in underground rock …
In underground mines hydraulic breakers mounted on the pedestal booms near to grizzly crushers are used for breaking oversized rocks (secondary breaking). Another very common application is scaling (roof support) after drilling and blasting. The Drum Cutters are used successfully as a …
اقرأ أكثر
Below the surface: Setting up an underground primary jaw crusher
A jaw crusher usually wears more manganese steel per crushed tonne than a gyratory crusher. Feeding fines into the crusher may increase peak stress loads because of packing ? ie material being compacted as far as it compacts. This is enhanced by moisture, which again is highest in the fines and quite common in underground mines.
اقرأ أكثر
Construction Technology of Pipe Jacking Method through Underground …
PDF | On Dec 23, 2022, Jianyong Han and others published Construction Technology of Pipe Jacking Method through Underground Obstacles | Find, read and cite all the research you need on ResearchGate
اقرأ أكثر
Slot blasting sections | Download Scientific Diagram
Download scientific diagram | Slot blasting sections from publication: Innovative Mining Method, Related Support Systems and Quality Assurance for Large Underground Crusher Excavation De Beers ...
اقرأ أكثر
Rock Fragmentation Evaluation towards Blast-To-Mill …
underground mining stopes through the various mining operations to the comminution process. This paper evaluates the fragmentation of in-situ rock blasting, and further introduces a unique approach to evaluate rock fragmentation on the ROM pad and the impact of rock fragmentation on the performance of the primary crusher. Traditionally,
اقرأ أكثر
Suggested framework for design effort and acceptance …
A variety of design methods are used for underground mine excavation design. These can broadly be classed as empirical, observational, analytical and numerical methods (Dunn 2014, 2015, 2019). Irrespective of what design method is used and whether the design approach is deterministic or probabilistic, the reliability of the
اقرأ أكثر
Design of large underground caverns for hydroelectric …
of the rock mass to the excavation sequence and the acceptance of load by the support system is particularly important and the rock -support interaction concept (Ladanyi, 1974; Hoek & Brown, 1980) can be used as a guide in the overall support design. In weak rock, underground excavation stability is generally controlled by failure of the
اقرأ أكثر
Chapter 19 Loading and Transportation for Underground …
According to the conditions of the project, there are different loading (mucking) and transportation (hauling) methods and different combinations of them. Overhead shovel loader. This machine …
اقرأ أكثر
A 15 m span crusher chamber for an …
A 15 m span crusher chamber for an underground mine is to be excavated in a norite at a depth of 2,100 m below surface. The rock mass contains two sets of joints controlling stability. These joints are undulating, …
اقرأ أكثر
7 Excavation design in massive elastic rock
vice openings include mine accesses, ore haulage drives, airways, crusher chambers and underground workshop space. They are characterised by a duty life approaching the mining life of the orebody. ... considered later in conjunction with the related mining methods.) A logical frame- ... Excavation design for the case where rock mass strength is ...
اقرأ أكثر
Numerical modeling of deformation and damage around underground
The phase-field method can be easily implemented in standard finite element codes and has successfully been applied to various engineering problems ... A time-dependent anisotropic model for argillaceous rocks. application to an underground excavation in callovo-oxfordian claystone. Comput. Geotech., 85 (2017), pp. 341-350. View PDF View ...
اقرأ أكثر
Probabilistic three-dimensional kinematic analysis to …
An example of the improved method is presented for an underground crusher complex which has complex excavation geometry and areas of concerns (e.g. multiple mine levels, large brows, and large spans). The example shows the significant advancement in the probabilistic assessment of 3D kinematics, including
اقرأ أكثر
derground crusher excavation methods
Derground Crusher Excavation Methods Jaw Crusher Underground Crusher Addition. Underground mining methods and equipment transported to the underground ore bins or direc tly to the main haulage level finally ore is collected on the main haulage level and transferred to an underground crusher for size reduction to facilitate transportation by ...
اقرأ أكثر
Underground Mining Methods
Underground Mining Methods ... crusher. The crushed ore is then elevated (raised) to the surface in a skip. As the muck is taken out, more ... Stope - an underground excavation from which ore has been removed Tailings - materials rejected from a mill after the recoverable valuable minerals have been extracted.
اقرأ أكثر
Australian Centre for Geomechanics | Conference Paper: …
The Panel 2 (PC2) crusher is a key component of the OT underground ore handling system, which has a total capacity of 95 ktpd; the PC2 crusher processes 45 ktpd of this total. The PC2 crusher chamber is a large excavation located at a depth of 1,300 m, with a stand-off distance of 280 m from the Panel 2 footprint.
اقرأ أكثر
(PDF) Underground mining Methods
Underground mining methods are usually classified in two categories of methods: Prof. Dr. H.Z. Harraz Presentation ... The under-cut excavation provided the free surface necessary f or VCR blasting.
اقرأ أكثر
Understanding Underground Structures: Rock Mass …
1/23/2022 Lecture Note by Endalu Tadele (PhD) UNDERGROUND STRUCTURES DESIGN METHODS Example 2: A 15 m span crusher chamber for an underground mine is to be excavated in a norite at a depth of 2,100 m below surface. The rock mass contains two sets of joints controlling stability. These joints are undulating, rough and unweathered with very minor …
اقرأ أكثر
Underground Mining Methods
See more on mineralsed.ca
Underground Mining Methods
Ramps (inclined tunnels) are excavated to connect the surface to the underground ore body. Drifts (horizontal tunnels) are excavated at different elevations to surround the ore body. Next, …
اقرأ أكثر
(PDF) UNDERGROUND MINING METHODS
This paper discusses various underground mining methods to access and exploit ore bodies that are not surface-exposed. It details the complexity of underground mine infrastructure, including the different types of access tunnels, excavation …
اقرأ أكثر
Extraction Methods
This chapter reviews the main topics related to aggregate extraction from surface and underground methods. Although aggregate sources can be widely variable, the methods of extraction are very similar throughout the world, with crushed rocks mainly extracted from quarries (surface and underground mining) and sand and gravel from gravel pits.
اقرأ أكثر
SUPPORT IN UNDERGROUND HARD ROCK MINES
The choice of the type of support installed in a particular underground excavation depends upon the extent of the zone of loosened or fractured rock surrounding that excavation. A very crude guide to support selection is given in Table 1. Active rock reinforcement Underground mines use two principal types of rock reinforcement - tensioned
اقرأ أكثر
underground crusher excavation methods
A comprehensive underground excavation design (CUED. 202171 The objective of this research is to present a new methodology "Comprehensive Underground Excavation Design" called CUED method with emphasis 2013512 Surface and Underground Excavations Methods, Techniques and Equipment (2nd edition) covers the latest technologies and developments in the excavation …
اقرأ أكثر