big bench blasting in mining operations

Enquiry ›

Blast optimization at Kriel Colliery - University of… pdf

General information on blasting operations. This study was conducted in both Pit 5 and. Pit 6. The overburden in Pit 5 is drilled on a. 10 m x10 m blast hole pattern and a bench height in excess of 30 metres. The blast holes ... fragmentation is too big, back break into the new highwall, capping is experienced and/or excess...

Controlling fragmentation - Orica Mining Services pdf

mining operation. By optimising fragmentation, you can achieve significant improvements in waste productivity, mill throughput, lump fines and wall stability. .... the bench and face. We'll also know the desired end result, such as whether you are blasting waste or in an ore zone. In any mine we'd expect there to be a different...

GET MORE INFORMATION

Surface Coal Mining Methods in Australia -… pdf

9 Mar 2012 ... Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been .... blasting and/or dozer assistance to increase overburden removal capacity (Westcott et al., ... of rehandle bridges across the strip to transport waste from lower benches to the dump. As.

GET MORE INFORMATION

Chapter 8 BLAST DESIGN pdf

The economic analysis of the use of explosives is an important part of blasting operations in mining and ... Explosives are energy, and the efficient use of this energy is a major factor in keeping rock blasting ... The geologic formation, such as hard seams, cap rock, hard bottom, or large toes, dictate the use of high-energy.

Flyrocks – Detection and Mitigation at Construction Site in… pdf

1 Jan 2011 ... In any surface mine, blasting is a crucial operation. Explosives in large quantities has been used for fragmentation of rock in surface mines but only a part of the explosive energy has been used in doing the useful work, the rest has been consumed toward unwanted work such as ground vibration, fly rocks,...

GET MORE INFORMATION

P&Q University Lesson 4- Drilling & Blasting |…

26 Jun 2015 ... Today, the need to be able to operate in smaller hole size ranges, tight and rough benches and heavily broken rock strata has given rise to a merging of carrier/configuration arrangements that look and function like a modern large-scale top hammer track drill, but utilize an on-board compressed air system...

GET MORE INFORMATION

rock breakage and blast design considerations in…

12 Oct 2012 ... Rock breakage by Detonation and Interaction of explosive energy with rock – There are three sources of generation of fragments in mines: (a) ... Rock fragmentation by blasting is achieved by dynamic loading introduced into the rock mass. .... ii) large diameter holes shot sequentially = 1.2 – 1.5 x burden.

GET MORE INFORMATION

on ROCK FRAGMENTATION BY BLASTING pdf

5 Mar 2017 ... The Kuz-Ram Model for Prediction of Fragmentation from. Blasting. C.V.B. Cunningham, South Africa. Computer Modelling of Fragmentation from an Array of ... Energy Requirements of Rock Breaking in Mining Operations: ... A large amount of information was required over a short period, so drilling patterns...

GET MORE INFORMATION

Blasting Operations | Article about Blasting…

operations in the national economy that are accomplished by blasting natural materials (rock, wood, or ice) or artificial materials (concrete, masonry and .... Chamber charges were also widely used in the underground exploitation of large underground deposits of hard ore by systems of mine breaking in the Krivoi Rog area...

GET MORE INFORMATION

Drilling and blasting - Wikipedia

Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam or road construction. The result of rock blasting is often known as a rock cut. Drilling and...

GET MORE INFORMATION

A new stemming application for blasting: a case study -…

The stemming of blast hole collars in surface mines with an inert material redirects blasting energy to the rock more efficiently; thus the energy is utilized more ... the plaster stemming round resulted in a slightly more scattered muck pile owing to more blast energy directed to the rock, but this did not create a big problem...

GET MORE INFORMATION

design of surface blasts- a computational approach - Semantic… pdf

variation of avg. production with diameter and rock type. 43. 9. Relationship of bench height, stemming with diameter & UCS of rock for large blast hole. 44. 10 ... operation is divided into two section; underground mining, surface mining. ... In spite of introduction of continuous rock cutting equipments, drilling and blasting.

GET MORE INFORMATION

Health and Safety at Opencast Mines, Alluvial… pdf

GOOD PRACTICE GUIDELINES // HEALTH AND SAFETY AT OPENCAST MINES, ALLUVIAL MINES AND QUARRIES. 72 ... Mining operations must address the ..... during the blasting operation leading to fly rock. > The amount of explosives placed in the shot-hole is not suitable for the rock type leading to overcharging.

GET MORE INFORMATION

Blasting damage in rock - Rocscience pdf

Blast damage in rock. 2. The need to change the present system is not widely recognised because the impact of blasting damage upon the stability of ... the `tension fractures' frequently observed in open pit and strip mine operations where ... below the surface in a very large slope, and also because this failure surface will.

GET MORE INFORMATION

3 Technologies in Exploration, Mining, and Processing…

Comminution (i.e., the breaking of rock to facilitate the separation of ore minerals from waste) combines blasting (a unit process of mining) with crushing and grinding (processing steps). In-situ mining ...... Blasting is also used to move large amounts of overburden (blast casting) in some surface mining operations. Improved...

GET MORE INFORMATION

Economic evaluation of optimum bench height in quarries -… pdf

The Journal of The South African Institute of Mining and Metallurgy ... Today, bench height can be designed up to 15 m in large quarries, while it can be 12 m in small ones. Moreover, in small open pit gold mines it is feasible to design bench heights up to 7.5 ... blasting operation, other design parameters can be calculated.

GET MORE INFORMATION

Rock blasting for mining - SlideShare

28 Jul 2017 ... In mining operations, blasting has become a routine work. ... 5 The basic objectives of this report is to highlight the principles and practices adopted in rock blasting operations for mining sectors. ... Large scale mining in hard rock zones are difficult without the application of drilling and blasting operations.

GET MORE INFORMATION

Fragment Size Distribution in Blasting pdf

Fragment development in bench blasting has been modeled by the numerical simulation method and ... sizes distribution of fragmented rocks in blasting. Rock fragmentation has been used an index to estimate the effect of bench blasting for the mining industry. ... big obstacle in determining fragment size distribution by.

Worlds Biggest (Current Blast Mine Blast) 22nd…

22 Jul 2009 ... One REALLY REALLY REALLY REALLY REALLY Big Fucking blast!

GET MORE INFORMATION

Benjamin Cebrian Abstract Rock blasting at quarries ... -… pdf

In this paper, a practical case for optimizing blasting operations at a large quarry in southern Spain describes all the evolutions performed in the information, management and technical aspects involved in mine-to-mill optimization at a limestone operation with multiple benches and geologies. Introduction. Manilva limestone...

GET MORE INFORMATION

Surface - Blast Design - OSMRE pdf

This module presents recommended blast- design practices for surface-mine and quarry blasting. Surface-Blast Design .... produce a smooth rock wall. Presplitting will add a large drilling cost to an operation. ... Spacing. Presplit spacing will vary, depending upon rock characteristics, size of the operation, and bench height.

GET MORE INFORMATION

Techniques of Controlled Blasting - Presentation… docx

This is known as Ammonium Nitrate fuel oil mixture or ANFO which is widely used for blasting in the mining industry be it a quarry or a big open cast mine. 3. ..... Millisecond delay initiation of the explosive charge is a technique used in most open pit, quarry, tunnel and underground rock blasting operations. It serves to...

GET MORE INFORMATION

Fatal Accidents Due To Flyrock And Lack Of Blast Area Security And… pdf

and personnel employed by the mining industry still continue to suffer fatal and disabling injuries from blasting accidents. Blasting generally has two purposes: rock fragmentation, and displacement of the broken rock. The movement of the blasted rock (also known as muckpile) depends on the shot-design parameters...

GET MORE INFORMATION

Mine Blasting & Explosives Technology, and Safety…

Good blast design and execution are essential to successful mining operations. Improper or poor practices in blasting can have a severely negative impact on the economics of a mine. The use of excessive explosives at a mine site can result in damages to the rock structures and cause unwanted caving and large increases...

GET MORE INFORMATION

Optimization Of Blasting Design Parameters On Open Pit… pdf

Mining costs for unit operations which includes loading, hauling, crushing costs reduce with increasing rock fragmentation sizes. Quality of blast results in open pit bench blasting plays a key effect on the efficiency and cost of drilling and blasting and subsequently mining unit operations such as loading and hauling, later on...

GET MORE INFORMATION

Effect of Stemming to Burden Ratio and Powder Factor ... -… pdf

Large Rock Reliefs and Their 3D ... surface mining. Rock fragment size direct effects on the costs of drilling, blasting, loading, secondary blasting and crushing. The main purpose of this study is to investigate effect of blast ... in obtaining an optimum fragmentation as well as to minimize the entire cost of mining operations.

GET MORE INFORMATION

Rock fragmentation control in opencast blasting…

The blasting operation plays a pivotal role in the overall economics of opencast mines. The blasting sub-system affects all the other associated sub-systems, i.e. loading, transport, crushing and milling operations. Fragmentation control through effective blast design and its effect on productivity are the challenging tasks for...

GET MORE INFORMATION

Evaluation and Analysis of Blasting Procedures for… pdf

Approximately 25-30% of the overburden con sists of hard and semi-hard formations, which are removed using conventional mining methods, while the remainder is excavated by BWEs. As early as. 1981, there was a decision to apply large-scale drilling-and-blasting operations to loosen the hard rock formations and to use...

GET MORE INFORMATION

Surface Drill Rigs, Drilling Systems, Rock Drilling And…

surface drill rigs and rock drilling rigs deliver exceptional results in quarrying, opencast mining and construction applications, delivering power and precision where you need ... We're confident that we can provide you with this unbeatable technology while keeping your overhead operating costs as low as possible.

GET MORE INFORMATION

Glossary of Mining Terms - RocksandMinerals.com

Blasting cap — A detonator containing a charge of detonating compound, which is ignited by electric current or the spark of a fuse. Used for detonating explosives .... Dragline — A large excavation machine used in surface mining to remove overburden (layers of rock and soil) covering a coal seam. The dragline casts a wire...

GET MORE INFORMATION

New to Mining? Here are the Most Common Types of…

21 Dec 2015 ... Blasting equipment is used for both underground and open pit mining operations and is known to be one of the most hazardous aspects of the job. For mining operations to be successful good blast designs are absolutely vital as poor practices and excessive explosives can result in damage to rock...

GET MORE INFORMATION

Drilling and Blasting pdf

27 Jun 2012 ... This Memo describes the drilling and blasting operations at KSM for the PFS. Drilling and blasting operations create suitable fragmentation of the rock for the .... At an average rock density of 2.77 tonnes/m3 this equates to a powder factor of 0.35 kg/tonne. This is similar to other large open pit projects in the...

GET MORE INFORMATION

The application of a blast audit for production ... - Dyno… pdf

ABSTRACT: An audit of the blasting operation at a large iron ore mine in North America was used to improve production and lower costs. The audit reviewed the blasting practices in order to identify oppor- tunities for operational improvements. The approach taken in the audit was to evaluate general blasting practices...

GET MORE INFORMATION

Jobs - Job Details - Blasting Coordinator - First Quantum…

30 Mar 2017 ... First Quantum Minerals Ltd. has grown from a small mineral operation in Zambia into a multinational mining business in less than two decades, with a global portfolio of copper and nickel ... Experience in large multi pit operations utilising large scale mining equipment ie blasting experience essential.

GET MORE INFORMATION

Benefits of inclined hole drilling in large open-pits ...… pdf

cover the range from 127 to 250 mm. Hydraulic top-hammer drilling has special features that affect the drilling and blasting cycle. Improved extraction methods ..... better bench conditions. - better selectivity of the ore. Drilling for blasting. Final pH walls. The Sydvaranger iron mine in Norway is drilling production holes with...

GET MORE INFORMATION

A novel powder factor based bench blast design ... -… pdf

bench blasting. This research examines the typical scale of bench blasting at large surface coal mines, develops a new method of design tailored for these operations, and tests the new method against two widely accepted traditional blast design methods. Novel contributions of the research include a new universal scale of...

GET MORE INFORMATION

Blast optimization at Kriel Colliery - SAIMM pdf

General information on blasting operations. This study was conducted in both Pit 5 and. Pit 6. The overburden in Pit 5 is drilled on a. 10 m x10 m blast hole pattern and a bench height in excess of 30 metres. The blast holes ... fragmentation is too big, back break into the new highwall, capping is experienced and/or excess...

GET MORE INFORMATION

on-bench practices for open cut mines and… pdf

1 Nov 2015 ... The use of explosives to break rock involves the sudden application of large amounts of energy, and is ... to achieve different blasting outcomes. It is understood that specific blasting practices and applications vary significantly across open cut coal operations, open pit metal mines and quarries, and...

GET MORE INFORMATION

Mining - KCGM

If large voids are detected further underground they may be collapsed by deep blasting or backfilled to reduce the risk and allow continued mining. ... The shovels and trucks in Load and Haul operate 24 hours a day, 365 days of the year, moving the ore and waste rock from the Pit floor to the next step in the gold recovery...

GET MORE INFORMATION

Development and Application of Blast Casting Technique in…

20 Dec 2015 ... In surface mining operation, rock fragmentation and overburden removal are two important tasks that are required. .... Whereas the amount of rock and charge weight in one blast casting are large, millisecond blasting is of great significance to reducing the blast vibration effect and controlling blast hazards.

GET MORE INFORMATION