final wall blasting in open pit mines

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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Wall Control Blasting in Open Pits onemine.org

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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GUIDELINES ON SAFETY BUND WALLS Department of

Safety Bund Walls Around Abandoned Open Pit Mines Document No. ZMA048HA and used, and the quality of installation is verified (e) analysis is carried out of open pit wall stability for the projected geometry of the pit (f) appropriate drilling and blasting procedures are used to develop final walls and

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Controlling fragmentation Orica Mining Services

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

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open pit mine blasting YouTube

Nov 29, 2010 · open pit mine blasting Porti Nitti. Loading Unsubscribe from Porti Nitti? FL Openpit continuous mining equipment Duration: 5:04. FL 4,144 views. 5:04.

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Openpit mining Wikipedia

Openpit, opencast 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.Openpit mines are used when deposits of commercially useful ore or rocks are found near the surface.

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Design of controlled blasting (presplitting) in Golegohar

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 presplitting through implementation of direct and cost effective experiments. Three tests were designed and performed at the mine. Back

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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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Hollinger open pit operational support SRK

The Hollinger Open Pit, one of Goldcorp''s Porcupine Gold Mines, is situated in the goldmining City of Timmins, in northern Ontario, Canada. The Porcupine Camp, loed above a sequence of Archean basaltic volcanic rocks, led to the establishment of Timmins.

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Summary of Surface Blasting and Damages with Analysis of

Blast Damage Mechanisms at Ekati TM Mine by Peterson (2001) The EkatiTM Diamond Mine is loed in the Northwest Territory, Canada. The study was done to determine the quality of the final pit wall using the presplit blasting technique. As a part of the study, vibration and gas penetrating equipment were set up and a total of 3 blasts were

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Openpit mining Wikipedia

Openpit, opencast 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.Openpit mines are used when deposits of commercially useful ore or rocks are found near the surface.

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After 103 years, Chile''s Codelco blasts at mining.com

Sep 12, 2018 · Sunday Sep. 9, 2018 will go down in Chile''s copper state miner Codelco''s history of as one the most important days of its Chuquicamata mine''s 103 years of existence. This, because it

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Blasting near open pit walls papers.acg.uwa.edu.au

Blasting near open pit walls CK McKenzie 84 APSSIM 2016, Brisbane, Australia Open pit blasting must be considered as a mining process with welldefined customers, those being the excavator/truck fleet (pit productivity), the processing plant (plant productivity), and the geotechnical department (pit

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GUIDELINES ON SAFETY BUND WALLS Department of

Safety Bund Walls Around Abandoned Open Pit Mines Document No. ZMA048HA and used, and the quality of installation is verified (e) analysis is carried out of open pit wall stability for the projected geometry of the pit (f) appropriate drilling and blasting procedures are used to develop final walls and

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Improving Double Bench Face Performance at the Ekati

escaping the ch bench and increases the overall strip ratio. The generally utilized process of trim blasting also can impact on the final bench profile by contributing to blast damage of the face. BHP Billiton Diamonds Inc., Ekati Mine Diamond MineTM, has pioneered the usage of a technique that eliminates this offset.

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Blasting damage in rock rocscience.com

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 multirow blasts have been used.

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Surface mining Wikipedia

Surface mining, including strip mining, openpit mining and mountaintop removal mining, is a broad egory of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.

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Controlled blasting in an openpit mine for improved slope

A case study is presented where a controlled blasting programme (presplitting) was adopted in an openpit 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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WALL CONTROL BLASTING TECHNIQUES .com

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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HIGHWALL 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 pitwall sides of the blast.

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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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Safety in Open Pit Mining 911metallurgist.com

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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Limiting Blastinduced Damage On Final Pit Walls AggNet

However, it is avoidable with the correct design and appliion 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 presplitting and trim blasting.

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OpenPit Mining Methods

Openpit mining methods are applicable to mining ore deposits that apex at or near the surface. If the deposit apexes below the surface, the overburden and barren capping overlying the ore must be removed in advance of openpit mining. The removal of this material is known as stripping.

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Open pit maxamcorp.com

Open pit The exploitation of an openpit 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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Design of controlled blasting (presplitting) in Golegohar

This technique is especially effective in backbreak 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 presplitting through

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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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Design of controlled blasting (presplitting) in Golegohar

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 presplitting through implementation of direct and cost effective experiments. Three tests were designed and performed at the mine. Back

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Delay time optimization in blasting operations for

Blasting induced vibration is one of the fundamental problems in the openpit mines and intense vibration can cause critical damage to structures and plants nearby the openpit mines, especially to the final pit wall''s stability.

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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, presplitting, trim blasting, initiation sequences and systems and reduced blast size will be explored

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Explosives and Blasting Agents Google Sites

Explosives and Blasting Agents. Modern explosives can be classified into two main egories: 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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Blasting damage in rock rocscience.com

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 multirow blasts have been used.

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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 prestripping phase there was little attention paid to wall

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Bonno Mojaki Mojaki Drill & Blast Manager Lucara

About. A safety and qualityoriented Mining/Blasting Engineer with indepth knowledge of Drilling & Blasting operations in open pit mining, with proven track record in final wall blasting.

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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.

Get Price

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, presplitting, trim blasting, initiation sequences and systems and reduced blast size will be explored

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Appendix E6 Canadian Environmental Assessment Agency

Appendix E6 Open Pit – Drilling and Blasting . 1 P a g e Memo Mitchell pit in the KSM project will have an extremely high engineered pit wall and as such, The blasting crew will be provided by the mine and will be a daytime only shift, 7 days per week. Based on existing mines of similar size, previous experience and the layout of the

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Open pit maxamcorp.com

Open pit The exploitation of an openpit 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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