latest developments in mine blasting techniques

PDF New blasting techniques for productivity enhancement

The pace of developments in underground blasting technology is insignificant in contrast to developments in opencast blasting Blasting practices in underground mines has limited flexibility due...

Developments in Surface Contamination and Cleaning

Abstract Carbon dioxide CO 2 snow cleaning is a straightforward surface cleaning process in which a stream of small dry ice particles impact and clean a surface via physical momentum transfer and solvent interactionsThese interactions have been shown to remove particles of all sizes from visible to nanometer scale and to remove organic residues as well as reagent grade solvents...

TUNNELS SHAFT AND DEVELOPMENT HEADINGS BLAST

development headings has great influence on productivity Many contractors mining companies and manufacturers have put much effort into the development of mechanized equipment and techniques that have improved heading advance rat New super pneumatic jumbo drills have penetration rates as high as 180 m/hr 505 ft/hr...

Recent Drilling and Blasting Developments Groote Eylandt

Drilling and blasting practices at Groote Eylandt are undergoing a period of rapid change Practices over the last ten years are reviewed and some specific blasting problems currently being faced are described A move from percussion to rotary drilling is outlined together with the reasoning behind a proposed return to ANFO from watergel explosiv...

3 Technologies in Exploration Mining and Processing

Canada has led the world in geophysical innovations primarily through industry support for academic programs and through in-house corporate development of new techniqu An example of the latter is the recent development by the mining industry of a prototype airborne gravity system...

Blasting a presplit in Granite

This was one of the most rocky home sites that I ve ever blasted more than 50 individual blasts 60 truck loads of hard Granite This video gives a brief lo...

Blasting in Mining

This volume compiles papers of the workshop Blasting in Mines New Trends hosted by the Fragblast 10 Symposium The 17 papers provide a mix which highlight the evolving trends in blasting in min These range from special techniques of cast blasting...

drilling and blasting Archives

Orica said wireless blasting is a new and exciting technology that eliminates the use of cumbersome and complex wiring hook-ups while having the accuracy of an electronic detonator It has already enabled safer work methods and mining techniques that increase recovery productivity and efficiency according to the company...

Techniques of Controlled Blasting

Dec 17 2009 0183 32 Techniques of Controlled Blasting 1 In both the mining and construction industries blasting is the predominant method for fragmentation of consolidated mineral deposits and rocks researchers have started finding both limitations and new potential of this new technique...

Rock blasting detonics inside the mining industry s

Innovative blasting techniques and technologi The aim of the modules according to Dr Sharpe is to make relevant topics concerning rock blasting accessible to all They focus on the need-to-knows of rock blasting by being quantitative but removing all the mathematical elements from this type of...

Explosives Blasting Supplies For Underground Dyno Nobel

Dyno Nobel is a leading supplier of industrial explosives and blasting services to the mining quarrying seismic and construction industri Visit Dyno Nobel Incitec Pivot Limited is an industrial chemicals manufacturer supplying the agriculture and mining industri...

PDF Blasting and Mining

mines for blasting operations which are conducted to fragment the blasting a development heading is initially excav ated at the top Crater blasting techniques are often employed for larger...

Ten technologies with the power to transform mining

Mining is being increasingly carried out underground as open pits near the end of their mining life and new ore bodies are increasingly being identified deep underground Constructing underground mines with the use of conventional shaft and tunnel boring machines however has proved to be technically challenging expensive and sluggish...

Designing Blast Patterns Using Empirical Formulas

technique by comparing drill and blast pattern dimensions used in the quarry A recent study 14 showed horizontal bedding without or with conspicuous jointing folds faults caves and filled joints influence blasting and mining in lime 173...

SUBLEVEL CAVING TECHNIQUE by Partha D Sharma

Jun 25 2010 0183 32 Development - The first stage of mining is drift development A drift is a tunnel that is driven into the rock Development involves construction of new areas of the mine...

Blasting technique

Blasting method of ground improvement techniques...

Chapter 11 SPECIALIZED BLASTING TECHNIQUES

blasting of cornices increases efficiency boring holes along the presumed tension line exposes the ava-lanche blaster to considerable danger Safety in borehole blasting depends critically on 1 The blasting crews ability to judge correctly the safe working line techniques for working with this high explosive See Chapter 5 - Detonating Cord...

Blast Training Course Guide

explosives/blasting industry of over 100 years of practical blasting experience in most blasting environments If required the course can be run for a small group from one organisation at a mine site or at a training venue convenient to the workplace Training Methods...

New trends in drilling and blasting technology

May 10 2007 0183 32 In the modem mines it is very common to encounter the latest forms of laser measurement technologies global positioning systems GPS communication technology and computer systems The developments in the areas of planning and design of blasts drill monitoring drillhole deviation drill machine navigation systems and laser profiling systems...

Blasting Technique

In this article the major methods of underground blasting for face rounds will be discussed from an operational standpoint with the focus of helping mines choose which method of blasting would be most advantageous for their operation In future articles these patterns will be examined and methods for 21st century design will be discussed...

Blasting Techniques Used in Underground and Opencast Mines

Blasting Gallery Technique This is a new technique for depillaring of thick coal seams Blasting gallery technique was adopted at GDK 10 incline of Singareni Collieries Co Ltd with collaboration of M/s Charbonnage de France The method involves drivage of level galleries and depillaring by drilling holes in a fan pattern around the gallery...

DRILLING AND BLASTING

Aug 20 2018 0183 32 Course Outcomes Drilling and blasting is primary operation in any mining organization student understands various methods of drilling design and selection of drilling methods Knowledge about explosives and blasting techniques makes student confident in design of blasting...

The main trends in the development of blasting techniques

G P Demidyuk and V S Rogalis in Investigation of the Physicomechanical Properties and Blasting Breakup of Rocks in Russian Nauka Moscow 1970 Google Scholar Download references...

New trends in drilling and blasting technology Request PDF

Explosives and blasting techniques play a significant role in efficient opencast mining operations There have been constant technological developments towards safer faster economical and more...

BEST PRACTICES IN DRILL AND BLAST

A global trend is emerging in which mining companies are subcontracting out the total blasting services including drilling Some companies have even subcontracted all work functions at the mine and processing plant Over time mine management becomes fully reliant upon their explosive suppliers to the extent that all in-house blasting...

Experimental Study on the Blasting Performance of Water

Top stemming is necessary to stop the explosive energy from escaping through the upper part of blast-holes in cutting blasts of large-diameter deep-hole blasting in underground min The often-used single soil stemming frequently leads to material clogging which results in reduction of blasting efficiency In this paper a new water-soil composite stemming is proposed to solve the problem...

Cast Blast Design

This technique allows approximately 25 to 50 of the rock to be moved without the use of mine equipment Cast blasting can be employed with a a dozer push operation that follows the casting operation The combination of these two techniques can typically remove 60 to 80 of the overburden that originally existed over the coal seam...

How to Carry out Controlled Blasting of Rocks PDF

The main objectives of controlled blasting techniques are to minimize the overbreak and fracturing of rock beyond the designated boundary of excavation to achieve smooth post-blast surface and to control wild flyrock and ground vibration within permissible limits This objective is normally achieved by minimizing and making judicious use of explosives in the blast hol...

Keeping blast sites safe from lightning risks

Lightning strikes on opencast mines and quarries pose a regular threat to life and productivity and are of particular concern to blasting personnel and equipment but there is still much to be...

Blasting Principles

Development Mining to access the orebody a term used in both surface and underground mining Dilution The undesirable lowering of ore grade by mixing waste material during blasting and mining Dragline A large excavation machine used mainly in surface coal mining to remove overburden layers of waste rock and soil covering a coal seam...

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