Mining Method Fragmentation

Sublevel Caving Mining Method - Newtrax Technologies Inc.

Existing fragmentation assessment methods There are a number of methods to measure fragmentation of broken rock including sieving, 2D and 3D image based methods and laser scanning. Sieving (or screening) is the most common method for measuring the size distribution of granular media. However,

FRAGMENTATION A fragmented approach - Hexagon Mining

Fragmentation Assessment Studies for Mining New possibilities to quantitatively compare fragmentation in blasting and caving. In this article Dr Matthew Thurley explains wh y commercial in-pit rock fragmentation measurement systems cannot be reliable due to using photographic based imaging in an environment with uncontrolled lighting and ...

Thermal Fragmentation Mining Method - Nippon Dragon

less dilution when compared to conventional mining methods. The mining method reduces the environmental affects of mining operations since much smaller quantities of rock are displaced, stockpiled, and treated using chemical agents. The fully mechanised equipment operated by a 2-person team (1 thermal fragmentation operator, 1

Thermal Fragmentation: Nippon signs an exclusive licensing ...

underground mining method provided thatthe drawpoint sizeandhandling facilities are tailored tosuitthecavedmaterial andthatthe extraction horizon canbemaintained forthelife ... cavability,fragmentation,drawpatternsfor differenttypesofore,drawpointordrawzone spacing,layoutdesign,undercuttingsequence,,mdsupportdesign.

Mining | Mine Tech Australia

A comminution model for secondary fragmentation assessment for block caving Article (PDF Available) in Rock Mechanics and Rock Engineering · …

A comminution model for secondary fragmentation assessment ...

Reserve Estimation for Block Cave Mines Using GEOVIA PCBC • A gradual reduction of grade/value as one moves away from the ore zone. This is moderately favorable. If the cave or mining extracts material outside the target ore zone, …

Block caving: A new mining method arises | Geoengineer.org

Jul 25, 2018· Block caving is a new alternative method of developing new mines or extending the operation of open pits. Block caving is an underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight. It is the underground version of open pit mining.

Study 39 Terms | Practice questions Final Flashcards | Quizlet

FRAGMENTATION 70 International Mining | MARCH 2015 Control, prediction, and imaging of rock fragmentation in blasting is ev r mo ip t ang s way to provide more consistent mill feed and reduce downstream comminution costs with more effective particle size reduction in th epi, ros Paul M A fragmented approach In essence, thermal fragmentation ...

Bringing the heat: thermal fragmentation comes of age

1. Introduction. Sublevel caving (SLC) is a mass mining method based upon the utilization of gravity flow of blasted ore and caved waste rock (Kvapil, 1998).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 (Bull and Page, 2000).

Sandra's Cave Mining Handbook - Mining and Blasting

Mining methods covered include deep sea nodule mining, in situ gassification of coal, in situ retorting of oil shale, solution mining of soluble minerals, in situ leaching of metals, geothermal power generation, oil mining, nuclear fragmentation, slope caving, electro-thermal rock penetration and fragmentation.

Nippon to begin training and implementation of the Thermal ...

The fragmentation and pulverization properties of lignite in the different drying processes were investigated in this study. Lignite particles were dried at different temperatures (100, 140, and 180°C), particle sizes (6–25 mm) and drying time (0–60 min), and the parameters of fragmentation index (S f) and pulverization ratio (β) were used to describe the fragmentation …

fragmentation – Mining and Blasting

throughout the globe and have a significant presence in mining operations. The principle factor that has undermined the profitability and effectiveness of mining such ore zones is the substantial dilution that occurs when blasting with explosives during extraction. In order to minimise ore dilution, the thermal fragmentation mining method

thermal fragmentation - Mining Magazine

May 09, 2016· Bringing the heat: thermal fragmentation comes of age Share Canada-based junior gold miner Nippon Dragon Resources has developed a new, environmentally friendly mining method called thermal fragmentation, which uses heat to …

(PDF) Rock Blasting in Underground Mining

Mining Services Thermal Fragmentation is an economically viable, safe alternative to conventional mining methodologies. Thermal fragmentation utilises an in hole combustion process to cause primary solid state materials to fragment into small pebble size pieces and is especially effective in narrow vein high grade deposits. Thermal fragmentation can be utilised

Modelling of primary fragmentation in block caving mines ...

By utilising the thermal fragmentation method in combination with conventional mining methods, the company aims to become a mid-tier gold producer. In addition, by providing service agreements, the company intends to generate additional revenue and accelerate the spread of this unique technology.

Fragmentation Assessment Studies for Mining

Jun 07, 2018· Within the coming days Nippon's technical team will begin its customary 4 week orientation, training and implementation programme of its thermal fragmentation mining method at Metalfer's mining ...

Breakage and fragmentation modelling ... - Mining and …

Oct 12, 2012· Fragmentation, backbreak and toe problems are all dependent upon the blasting direction. Even though optimal fragmentation usually is the most important criterion, consideration of back wall, toe and bench floor must be considered to get an optimal total result.

Nippon Dragon Thermal Fragmentation Demonstration Video …

Apr 27, 2015· Thermal Fragmentation: Nippon signs an exclusive licensing agreement for Australia ... "I quickly realised that this versatile and innovative mining method is a solution needed by the mining ...

Press Release Rocmec Mining Inc. Symbols: RMI: TSX-V D5O: …

In Russia and the Ukraine, thermal rock fragmentation is actually used to drill large diameter holes in surface mining. Upon having acquired a better knowledge of this technology, it seems that it presents a great potential for selective mining in narrow-vein operations, for either surface or underground mining.

Block Caving Mining Method 101 - Newtrax Technologies Inc.

Dec 06, 2019· This paper creates a net present value (NPV) model of a mining method using thermal fragmentation, as well as for an existing method used for narrow vein mining; comparisons and evaluations were made regarding the feasibility of the new technology. It was found that while overall costs for thermal fragmentation were relatively high, reductions ...