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Final Wall Blasting In Open Pit Mines

Wall Control Blasting in Open Pits - onemine

Wall Control Blasting in Open Pits - onemine

Presplit and trim blasting are two control blasting techniques used to accomplish this. Both techniques are designed to create a low explosive energy concentration per unit of wall area at the perimeter of the pit. Energy concentration of the main production blast must also be controlled to avoid damaging the final pit wall.

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Case Study Cost Reduction in Wall Control Blasting

Case Study Cost Reduction in Wall Control Blasting

The Placer (Granny Smith) Sunrise Dam open cut gold mine is located near Laverton, WA. (Fig 1.) Mining of the Sunrise orebody began in 1995 and is currently mining in fresh volcanics and banded iron formations. For maximum profitability the development of the pit requires strict wall control blasting .

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Analysis of Safety Aspects And Mining Practices For .

Analysis of Safety Aspects And Mining Practices For .

decreasing the pit width and lowering the overall slope angle by use of a spoil bench. Mining Practice Controlled blasting methods are commonly used in Australian mines (6) to maintain pit wall stability. The methods include cushion blasting, pre-splitting, post-splitting, and using them with production blasts.

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Blasting near open pit walls - University of Western Australia

Blasting near open pit walls - University of Western Australia

Blasting near open pit walls. . a particular focus on presenting a thought process aimed at trying to avoid unnecessary and ineffective restrictions on mining practices and wall control blasting. Practices such as reduced blasthole diameter, pre-splitting, trim blasting, initiation sequences and systems and reduced blast size will be explored .

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17th Evolution of Blasting Practices at the Ekati™ Diamond .

17th Evolution of Blasting Practices at the Ekati™ Diamond .

Evolution of Blasting Practices at the Ekati™ Diamond Mine . 2.3 Wall Control Blasting Open pit development commenced at the 458 to 465m elevations above sea level, and will conclude . blasting against the final wall. During the pre-stripping phase there was little attention paid to wall

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Improved Blasting and Bench Slope Design at the Aitik Mine

Improved Blasting and Bench Slope Design at the Aitik Mine

Improved Blasting and Bench Slope Design at the Aitik Mine P-I. Marklund Boliden Mineral AB, Sweden J. Sjöberg Vattenfall Power Consultant AB, Sweden F. Ouchterlony Swebrec at Luleå University of Technology, Sweden N. Nilsson Nitro Consult AB, Sweden Abstract The Aitik open pit mine, located in northern Sweden, currently faces a substantial production increase,

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Design of openpit mining - SlideShare

Design of openpit mining - SlideShare

Mar 13, 2012 · DESIGN OF OPENPIT MINING I. Satyanarayana, M.Tech,MBA,MCADy. Manager, Project Planning, SCCL, [email protected], . Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.

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Final Wall Stability in Metal Open Pit Mines Using . - CORE

Final Wall Stability in Metal Open Pit Mines Using . - CORE

This paper aims to illustrate the technical aspects of use of the successful presplit blasting method in metal open pit mines. It also shows that using this approach not only increases safety in mines through wall stabilization, but also will boost economic profits by savings in stripping ratio.

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BLAST MANAGEMENT PLAN 2012 2015 - Vale

BLAST MANAGEMENT PLAN 2012 2015 - Vale

moves from this pit into the western mining area unless an additional blast is required following a blast misfire; and (c) 10 blasts a week on site, averaged over any 12 month period. 14. If the Proponent receives a written request from the owner of any privately-owned land within 2 kilometers of the approval open cut mining pits on site for a .

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STORRE: Final Wall Stability in Metal Open Pit Mines Using .

STORRE: Final Wall Stability in Metal Open Pit Mines Using .

Thus, the role of creating stable mine walls is crucial to safety and general operations of mines and any effort to optimize this process has great economic value for mine operators. This paper aims to illustrate the technical aspects of use of the successful presplit blasting method in metal open pit mines.

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Limiting Blast-induced Damage On Final Pit Walls | Agg-Net

Limiting Blast-induced Damage On Final Pit Walls | Agg-Net

However, it is avoidable with the correct design and application of blasting at the final pit wall. This paper presents some blasting methods for achieving better final walls. TRIM BLASTING. The two areas that have the greatest impact on blast damage to the final wall are pre-splitting and trim blasting.

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Predicting Blast-Induced Damage for Open Pit Mines Using .

Predicting Blast-Induced Damage for Open Pit Mines Using .

Blasting is the most common method used to fragment rock in the mining industry. However, given the violent nature of explosives and the high variability of results that can occur from blast to blast, there is potential to cause significant damage to the final walls of an open pit, which can

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Controlled blasting in an open-pit mine for improved slope .

Controlled blasting in an open-pit mine for improved slope .

A case study is presented where a controlled blasting programme (presplitting) was adopted in an open-pit copper mine in order to improve the stability of the resulting cut slopes. The aim was to reduce over break and minimize damage to the final pit walls from production blasts.

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Open-pit mining - Wikipedia

Open-pit mining - Wikipedia

Open-pit, open-cast or open cut mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining.Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface.

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Final Wall Stability In Metal Open Pit Mines Using .

Final Wall Stability In Metal Open Pit Mines Using .

Request PDF on ResearchGate | Final Wall Stability In Metal Open Pit Mines Using Presplit Blasting | Implementing stable final pit walls in open pit mines during the open pit designing phase and .

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Steepening Of Inter-ramp Slopes On A Final Wall At The .

Steepening Of Inter-ramp Slopes On A Final Wall At The .

The paper, Steepening Of Inter-ramp Slopes On A Final Wall At The Goldstrike Open Pit, will be presented by Barrick Nevada's Chief Geotechnical Engineer, Jeff Mattern. Located on the Carlin Trend gold belt in north-eastern Nevada, the mine has produced over 43 Moz of gold during the past 30 years.

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Open-pit mining - Wikipedia

Open-pit mining - Wikipedia

Open-pit, open-cast or open cut mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining.Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface.

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Final Blast in an Open Pit Mine - The GOODBYE Cut - YouTube

Final Blast in an Open Pit Mine - The GOODBYE Cut - YouTube

Jun 26, 2017 · This shows the Goodbye Cut, the final blast in an Open Pit mine. In the slow motion section the detonate cord sequence flashes can be clearly seen.

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Optimization of Blasting Parameters in opencast Mines

Optimization of Blasting Parameters in opencast Mines

optimization of blasting parameters in opencast mines a thesis submitted in partial fulfillment of the requirements for the degree of bachelor of technology in mining engineering by manmit rout & chinmay kumar parida under the guidance of dr. h. b. sahu department of mining engineering national institute of technology rourkela-769008

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Safety in Open Pit Mining - 911metallurgist

Safety in Open Pit Mining - 911metallurgist

Draperies directly act on the stability of the blocks, but also control their fall should failure occur. Such systems are common practice within Australia open pit mines. In surface mining, draperies are used to prevent rock from impacting directly onto the concrete covers used .

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Appendix G Pit Stability - NTEPA

Appendix G Pit Stability - NTEPA

mine would affect the stability of the open cut walls. Computer modelling was used to expressly . extends some 200m below even the bottom of the final pit stage, this is easily achievable. . • Open pit mining sequence; and • Open pit wall slope angles. The modelling presented many valuable findings.

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Blasting Safety – Revisiting Site Security

Blasting Safety – Revisiting Site Security

The bounds of the blast area were not adequately determined for this blast. In a coal mine blast, flyrock traveled 900 feet and landed beyond the permit boundary causing a fatal injury [MSHA, 1990a]. During a construction blasting operation near Marlboro, NY, flyrock was showered on passing motorists on Route 9 W about 180 feet from the blast pit.

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ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON .

ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON .

ESTIMATING THE EFFECTS OF BLASTING VIBRATIONS ON THE HIGH-WALL STABILITY . The stability of the high-walls is one of the major concerns for open pit mines. Among the various factors affecting the stability of high-walls, blast vibrations can be an important one. In general, worldwide the established respective government regulations and industry

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Open pit - maxamcorp

Open pit - maxamcorp

Open pit The exploitation of an open-pit mine is an exercise in safety, efficiency and productivity.We operate open pit mines worldwide, providing high quality solutions and contributing to .

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HIGH-WALL CONTROL AT ANGLO GOLD ASHANTI, .

HIGH-WALL CONTROL AT ANGLO GOLD ASHANTI, .

International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering André de Jager and Henk Ludik Page 515 Figure 5. Wave Interference Modeled for the EDD blast on 18 May 2005. The timing was designed to produce low vibration concentrations on the pit-wall sides of the blast.

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FINAL WALL STABILITY IN METAL OPEN PIT MINES USING .

FINAL WALL STABILITY IN METAL OPEN PIT MINES USING .

presplit blasting. The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation. PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit metal mines.

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List of Technical Papers – Mining and Blasting

List of Technical Papers – Mining and Blasting

Wall Control Blasting Techniques; Modification of Blasting Techniques as per Geological Conditions of Strata; Environmental Impacts of Mining; ACID DRAINAGE FROM MINES AND ITS RELATED PROBLEMS; Blast Fragmentation Appraisal-Means to Improve Cost Effectiveness in Mines; Cost effectiveness of open-pit hard rock Ore Mining

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Controlling fragmentation - Orica Mining Services

Controlling fragmentation - Orica Mining Services

approaching a wet final wall for instance. The process of assessing geology and outcomes to develop a catalogue of tailored design templates can result in substantial changes in mining performance. Two case examples are a large truck-shovel mine in China and an open-pit metals mine in Australia. The mine in China had relatively simple

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Blasting damage in rock - rocscience

Blasting damage in rock - rocscience

the `tension fractures' frequently observed in open pit and strip mine operations where poor blasting practices encourage pit wall instability. McIntyre and Hagan (1976) report vertical cracks parallel to and up to 55 m behind newly created open pit mine faces where large multi-row blasts have been used.

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A REVIEW OF THE DESIGN CRITERIA AND PRACTICAL .

A REVIEW OF THE DESIGN CRITERIA AND PRACTICAL .

International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering Simon St J Tose _____ Page 526 When modified production blasts cause too much damage on final walls, perimeter blasting methods need to be used. The best perimeter blasting results can be achieved in tough massive rocks. In

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Surface Mine Blasting - Office of Surface Mining

Surface Mine Blasting - Office of Surface Mining

SURFACE MINE BLASTING Proceedings: Bureau of Mines Technology Transfer Seminar, Chicago, IL, April 15, 1987 Compiled by Staff, Bureau of Mines ABSTRACT The Bureau of Mines has sponsored a comprehensive research program to enhance the safe, effective, and efficient use of blasting technology by the mining industry.

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Mine Development and Operations Plan v1 - Yukon

Mine Development and Operations Plan v1 - Yukon

MINTO EXPLORATIONS LTD. MINE DEVELOPMENT AND OPERATIONS PLAN FEBRUARY 2012 7 Figure 6: Critical section through northeast / east wall of Area 2 (SRK 2009). The east wall of Area 2 also analyzed and yielded a factor of safety of 2.10 with a probability of failure of 2.88%.

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GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES

GEOTECHNICAL CONSIDERATIONS IN OPEN PIT MINES

Geotechnical Considerations in Open Pit Mines Version 1.0 Department of Minerals and Energy Page 1 of 49 CONTENTS . the operation of the mine, to the final closure and abandonment of the mine. The design of . e.g. production and near-wall blasting, *

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Explosives and Blasting Agents - Google Sites

Explosives and Blasting Agents - Google Sites

Explosives and Blasting Agents. Modern explosives can be classified into two main categories: Blasting Agents (detonator insensitive explosives); High Explosives (detonator sensitive explosives); A blasting agent is defined as a chemical mixture which contains no ingredient that is itself an explosive and cannot be initiated by a No.8 detonator in open air.

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Innovative Solutions for Slope Instability and Rockfall .

Innovative Solutions for Slope Instability and Rockfall .

Mines must incorporate a method of wall control blasting such as pre-splitting or cushion blasting, which buffers the production blast from negatively impacting the walls, thus creating a more com petent highwall and catch bench. This practice provides an effective means to maintain the integrity of the final wall.

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Open pit - maxamcorp

Open pit - maxamcorp

Open pit The exploitation of an open-pit mine is an exercise in safety, efficiency and productivity.We operate open pit mines worldwide, providing high quality solutions and contributing to .

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WALL CONTROL BLASTING TECHNIQUES -

WALL CONTROL BLASTING TECHNIQUES -

Feb 25, 2011 · In fact, failure to properly control blasting at the final pit wall can cost a large open pit mine many millions of dollars expenses in additional waste removal for the same ore mined.

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International Journal of Science &Technology, Reference .

International Journal of Science &Technology, Reference .

mines Nchanga Open Pit mines are located in Chingola, in the Copperbelt province of Zambia. Open Pit mining at Nchanga started in 1938, in the main Nchanga Open Pit. More than a decade ago, Nchanga Open Pit was the largest base metals open cut in the world. It is still among the top five largest open cuts in the world. The mine's core

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Design of controlled blasting (pre-splitting) in Golegohar .

Design of controlled blasting (pre-splitting) in Golegohar .

This technique is especially effective in back-break control through providing a separating surface between the main blasting pattern and open pit final walls. In this study, a large open pit mine was the case study for the goal of designing pre-splitting through .

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Explosives and Blasting in Mines - Mining Engineer First .

Explosives and Blasting in Mines - Mining Engineer First .

Controlled blasting in an open-pit mine for improved slope stability.A controlled blasting programme (presplitting) was adopted in an open-pit copper mine in order to improve the stability of the resulting cut slopes. The aim was to reduce over break and minimize damage to the final pit .

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