mining method fragmentation

Cave mining thestateoftheart SAIMM

underground mining methods Severalcavemines thatproduce hightonnages fromunderground are planning toimplement dropdowns of200mor more Thiswillresultinaconsiderable change in theirmining environments Thesechanges will necessitate detailed mineplanning, ratherthan thesimpleprojection ofcurrent mining methods togreater depths

Rock Blasting in Underground Mining PDF Free Download

19 1 ADVANTAGES AND DISADVANTAGES OF SUBLEVEL CAVING Sublevel caving is a widely used mining method in metallic mines all over the world The modern sublevel caving was possibly developed in the iron mines of Sweden stemming, air deck, detonator placement, fragmentation, mining cost, mining safety, and environmental influence Some of

Application of laser scanning to measure fragmentation in

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

Bringing the heat: thermal fragmentation comes of age

May 09, 2016 Thermal fragmentation has been in development since the early 2000s but the technique really came into maturity around seven years ago Essentially, it involves using heat to shatter or spall rocks A conventional drill head creates a 150mm pilot hole in the mineralised structure and a thermal head is placed in the hole

MaXem Holdings new thermal fragmentation im mining com

The thermal fragmentation method is ideally suited to narrow vein mining I am very pleased with MaXems progress in the implementation of the thermal fragmentation mining method in South Africa and I hope that this agreement will be followed by several others of the same type, stated Donald Brisebois, President and CEO of Nippon

Thermal Fragmentation: Reducing Mining Width When

In order to minimise dilution, the Thermal Fragmentation Mining Method enables the operator to extract a narrow mineralised corridor, 50 cm to 1 metre wide according to the width of the vein, between two sub level drifts By inserting a strong burner powered by diesel fuel and

Nippon Dragon's Green Thermal Fragmentation Modernizing

Thermal fragmentation is a mining method that uses heat to 'spall' high grade veins, greatly reducing the use of explosives This method only extracts the mineralized ore with minimal dilution

Block Caving A Viable Alternative? Golder

Jul 10, 2018 Block cave mining is an underground mass mining method that allows for the bulk extraction of large, relatively lower grade, ore deposits with substantial vertical dimension In block caving, a large section of ore is initially undercut by drilling and blasting, creating a large unsupported roof that will start to collapse under its own weight

Thermal fragmentation and pulverization properties of

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 625 mm and drying time 060 min, and the parameters of fragmentation index S f and pulverization ratio β were used to describe the fragmentation and pulverization

Thermal Fragmentation as a Possible, Viable, Alternative

An estimate showing a comparison between the thermal fragmentation mining concept and the long hole mining method is presented and, finally, the future developments planned are listed View Show

Cave mining thestateoftheart SAIMM

underground mining methods Severalcavemines thatproduce hightonnages fromunderground are planning toimplement dropdowns of200mor more Thiswillresultinaconsiderable change in theirmining environments Thesechanges will necessitate detailed mineplanning, ratherthan thesimpleprojection ofcurrent mining methods togreater depths

thermal fragmentation Mining Magazine

MaXem has just signed a thermal fragmentation agreement with a mining company Development 07 JUNE 2017 Nippon signs agreement with Safescape Nippon has signed a distribution agreement with Safescape for its thermal fragmentation mining method Development 28 APRIL 2015

Prediction of Rock Fragmentation in Open Pit Mines

Fragmentation of the rock after blasting is an important determinant of the cost associated with these two components of mine development In this paper, fragmentation of the rock after blasting is estimated analytically by the use of neural network method

Controlling fragmentation Orica Mining Services

Mining has some defining features that differentiate it from other production process industries Four key features that define the mining industry are: 1 Process volatility 2 Asset scale 3 Energy intensity 4 Fragmentation for product value Process volatility If we consider a production train consisting of

MaXem Holdings new thermal fragmentation im mining com

The thermal fragmentation method is ideally suited to narrow vein mining I am very pleased with MaXems progress in the implementation of the thermal fragmentation mining method in South Africa and I hope that this agreement will be followed by several others of the same type, stated Donald Brisebois, President and CEO of Nippon

thermal fragmentation Mining Magazine

MaXem has just signed a thermal fragmentation agreement with a mining company Development 07 JUNE 2017 Nippon signs agreement with Safescape Nippon has signed a distribution agreement with Safescape for its thermal fragmentation mining method Development 28 APRIL 2015

Thermal Fragmentation Mining Method Nippon Dragon Resources

Thermal Fragmentation Mining Method An extraction process with multiple benefits that solves the challenges of today The extraction process allows thermal fragmentation with an accuracy of 2 cm to quickly extract any type of hard rock up to 110 cm wide

Mining Engineering Online

In the context of narrow vein mining of thin and highly concentrated orebodies there is a need for a mining method that can reduce dilution in order to remain economically viable This research project explored the viability of a new mining technology thermal fragmentation in narrow vein mining

Mining Mine Tech Australia

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

Thermal Fragmentation as a Possible, Viable, Alternative

In currently used mining methods, blasting techniques often causes dilution of valuable ore and results in costly processing requirements In the context of narrow vein mining of thin and highly concentrated orebodies there is a need of a mining method that can reduce dilution in order to remain economically viable This research project explored the viability of a new mining technology

thermal fragmentation Mining Magazine

MaXem has just signed a thermal fragmentation agreement with a mining company Development 07 JUNE 2017 Nippon signs agreement with Safescape Nippon has signed a distribution agreement with Safescape for its thermal fragmentation mining method Development 28 APRIL 2015

Mining Mine Tech Australia

Thermal Fragmentation Mining 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

McGill gets funding for fragmentation research Mining

He explained: The goal of this project is to create, test and validate a revolutionary method for rock fragmentation for underground mining and tunnelling projects The method uses newly modified soundless chemical demolition agents and innovative rock drilling patterns that together facilitate rock breakage for excavation work without the use

PDF Rock Blasting in Underground Mining

widely used mining method in various kinds of metallic mines all over Most blast fragmentation models assume the rock mass properties explosive properties and blast design variables to be

Nippon to begin training and implementation of the Thermal

Within the coming days Nippons technical team will begin its customary 4 week orientation, training and implementation programme of its thermal fragmentation mining method at Metalfers mining site located in Majdan Mountain district of Serbia

Ore Reserve estimation for Block Cave Mines Using GEOVIA

cave mining, which can make the ore reserve evaluation process more complicated The broad areas covered are the effects of ore body geometry, mining geometry, material fragmentation and flow, economics and mining history/sequencing The experience gained during the past 25 years has been with the use of the PCBC software package

Fragmentation Assessment Studies for Mining

Fragmentation Assessment Studies for Mining New possibilities to quantitatively compare fragmentation in blasting and caving

Determination of optimal fragmentation curves for a

Mining method The mine employs a conventional open pit mining method consisting of drill, blast, load, and haul phases The pit design is based on a split shell concept in order to prolong waste stripping as much as possible while providing a double ramp system to mitigate the risk of failing ramps The ore is mined by five split

Thermal Fragmentation as a Possible, Viable, Alternative

In currently used mining methods, blasting techniques often causes dilution of valuable ore and results in costly processing requirements In the context of narrow vein mining of thin and highly concentrated orebodies there is a need of a mining method that can reduce dilution in order to remain economically viable This research project explored the viability of a new mining technology

Thermal Fragmentation as a Possible, Viable, Alternative

An estimate showing a comparison between the thermal fragmentation mining concept and the long hole mining method is presented and, finally, the future developments planned are listed View Show

Thermal fragmentation tech readying for mining upswing

Thermal fragmentation is a continuous mining method that does not rely on explosives Soft explosives can, however, be used to break out any vein or rock remaining between the thermal holes

Numerical modelling for blast induced fragmentation in

Sep 01, 2017Ł 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

Thermal Fragmentation: Nippon signs an Mining News

Thermal Fragmentation: Nippon signs an exclusive licensing agreement for Australia Brossard Quebec, April 27th, 2015 Nippon Dragon Resources Inc the Corporation or Nippon TSX V Symbol: NIP, is extremely pleased to announce that it has signed an exclusive distribution agreement with SAFESCAPE for its patented Thermal Fragmentation mining method in various contracts

Thermal Fragmentation An Innovative Process for Mining

In order to minimise ore dilution, the thermal fragmentation mining method enables the operator to extract a narrow mineralised corridor, 30 cm to 1 m wide according to the true width of the ore vein By inserting a strong burner

Numerical modelling for blast induced fragmentation in

Sep 01, 2017Ł 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

Blast fragmentation measurements in International Mining

The more automatic methods provide consolidated fragmentation data per blast but may lose the geo spacing information of the rocks source Further rock fragmentation measurement located on the crusher discharge conveyor offers advantages and presents different but important data