open pit blast pattern

(PDF) A Practical Approach to Open Pit Blast Design: A ...

Field tests under prevailing conditions at the GNMC manganese open-pit at Nsuta, Ghana, established that a 2.0 m × 2.8 m drilling pattern with the design parameters listed in Table 3 gives better ...

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7 Rules of Thumb for Open Bit Blast Pattern ...

08/04/2018  Mineral/Ore Mined using the Hardrock Blast hole Drill, which are Heavy duty Rotary and or Down-The-Hole rigs for Blast hole drilling. It can help client to achieve the best economic and social benefit. Below is 7 rules of thumb for open bit blast pattern. 1. Burden. 25 to 35 hole diameters; 2. Spacing . size greater than 140 mm (5½”) 1.2 to ...

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Lec6 Open pit blast pattern.pdf - Rock Breakage 3069

9/10/2019 1 Rock Breakage 3069 Open Pit Blast Patterns and Explosive Distribution S. M. Farouq Hossaini 1 Terminology and geometry of open pit blasts Stemming Sub-drill Burden Hole Length Bench Height Cross Section through a single hole in a bench blast The burden for an explosive charge is the shortest distance to a free face or plane of relief. It is therefore the direction in which it is ...

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Deswik.OPDB (Open Pit Drill and Blast Design)

Open Pit Drill Blast Fast, efficient drill and blast design for surface mining methods. Request more info Download Brochure. Key Features. SUPERIOR DESIGN TOOLS . Intuitive layout of drillholes considers previous design and geological structures. Rapidly generate drill patterns using pre-defined hole templates then manually adjust as required to final design. DRILL PATTERN MANAGER ...

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International Journal of Science Technology, Reference ...

Open Pit Bench A Case Study Of Nchanga Open Pits Victor Mwango Bowa Abstract: In hard rock mining, ... layout of a blast pattern, the author follows a particular method according to Sharma,P.A,2008 and small Blasting Swedish method developed by Langerfors and Kihlstrom (1976) are used (Jimeno et at ,1995) . Different explosive suppliers and mining companies may use different methods which may ...

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Rock Engineering Practice Design

Drill Blast Drill Blast –– Blast Pattern DesignBlast Pattern Design One of the basic principles of designing the configuration and sequential detonation of blastholes in a one blast, is the presence of a free face parallel or sub-parallel to the blast holes, as detonation occurs. In some cases these free faces may already be present (benches in an open pit cases, these free faces may ...

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Blasting Drilling of Open Pit Mining - Hardrockdrills

23/10/2018  Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery – Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to now Classifications By operation size By material By level of mechanization Operation Size Huge operations 50 Mio t and more Big operations

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

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 implementation of ...

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Blast Hole Drilling: The Basic Process RPM Drilling

Open pit mining refers to mining minerals from, as the name suggests, an open pit; or may refer to any similar shallow mining operation. Open mine blasting plays a pivotal role in determining the needs of all other mining activities to come. From the loading and unloading, to transport considerations, the initial blasting will affect each and every activity that follows it. Therefore ...

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DRILLING AND BLASTING DESIGN BASED ON INVARIABLE

blast hole pattern value, m; q i is new specific energy cost, kgm/m3. The analysis of bulk blasts using (3) showed that even drastic change of energy costs (up to two times) and hole pattern (up to 1.5 times) kept good convergence of measured and expected blast results. The important point of

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Anatomy of an Open-Pit Mine Blast Stop Ajax Mine

Things to Look For and Understand in Open Pit Mine Blasting There are many commonalities that exist in most, if not all, big open pit blasts While the hole sizes and depths may vary, the over-all pattern of holes is pretty consistent. You will easily be able to see this in many of the shots portrayed. 1. These blasts will be overwhelming in scope and aftermath. 2. The holes are on 30 to 60 ...

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Lec6 Open pit blast pattern.pdf - Rock Breakage 3069

9/10/2019 1 Rock Breakage 3069 Open Pit Blast Patterns and Explosive Distribution S. M. Farouq Hossaini 1 Terminology and geometry of open pit blasts Stemming Sub-drill Burden Hole Length Bench Height Cross Section through a single hole in a bench blast The burden for an explosive charge is the shortest distance to a free face or plane of relief. It is therefore the direction in which it is ...

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Maptek - Open Pit Drill and Blast

Drill and blast designs are crucial for downstream mining success. Knowing how to layout and load blast holes, run blast reports, edit holes, and adjust explosive tie-ins will help you create effective designs and increase blast accuracy and blast safety. Register for Open Pit Drill and Blast to learn: Best practices for drill pattern design.

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Rock Engineering Practice Design

Drill Blast Drill Blast –– Blast Pattern DesignBlast Pattern Design One of the basic principles of designing the configuration and sequential detonation of blastholes in a one blast, is the presence of a free face parallel or sub-parallel to the blast holes, as detonation occurs. In some cases these free faces may already be present (benches in an open pit cases, these free faces may ...

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

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 implementation of ...

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Blasting Drilling of Open Pit Mining - Hardrockdrills

23/10/2018  Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery – Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to now Classifications By operation size By material By level of mechanization Operation Size Huge operations 50 Mio t and more Big operations

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The Most Advanced Blast Design Optimization Platform in ...

- Open Pit Blast - Under Water Blast o-pitblast Objective - Deliver optimization services - Save cost - Direct savings - Administration Services - Mine2Mill optimization Focus. Our products o-pitblast O-Pitblast Blast Design Optimization Platform O-PitApp Field control (Android e iPhone) O-Pitblast Analytics Online Blast KPI control O-PitHolo 3D Free Face and Boulders Scan ...

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Mining - KCGM - Home - KCGM

Images of the stages of Mining in the Fimiston Open Pit. Drilling a Blast Pattern. High Reach Drill for Geotechnical Work Invented at KCGM. Long Reach Drill over Voids Invented at KCGM. Charging the Blast Hole with AmPho. Wiring the Blast Holes. Loading a Blast Hole with a Charge. Wiring up the Blast Holes . A Blast in the Fimiston Open Pit. Watering for Dust Control. Loading a Haul Truck. A ...

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2004G Volume 2 - A Study of Damage Profiles Behind Blasts

In open pit blasting, limits blast designs generally include pre-splitting, trim blasts, or buffer blasts, all of which are designed to limit, or eliminate, damage beyond the designed pit wall. This paper reports on the findings of a study of the profile of damage in rock masses surrounding blasts, determined by a combination of vibration onitoring, displacement monitoring usingm extensometers ...

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The best solution for mining operations around the world ...

The latest innovation in blast design. O-Pitblast is the bridge that connects blast managers and mining operations by figuring out a new way to design, measure, evaluate and optimize your drill and blast operations. A complete software aimed to plan, control and optimize. Information . O-PitAnalytics. All reports in one place. An integral part of the O-Pitblast platform, Analytics brings ...

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Lec6 Open pit blast pattern.pdf - Rock Breakage 3069

9/10/2019 1 Rock Breakage 3069 Open Pit Blast Patterns and Explosive Distribution S. M. Farouq Hossaini 1 Terminology and geometry of open pit blasts Stemming Sub-drill Burden Hole Length Bench Height Cross Section through a single hole in a bench blast The burden for an explosive charge is the shortest distance to a free face or plane of relief. It is therefore the direction in which it is ...

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blast pattern – Mining and Blasting

12/10/2012  Blast Design: This is meant to be a toolbox for blast design in conventional rock quarrying and open pit mines. This write-up is not meant to give straight answers to the blast design parameters, as every single quarry is unique. However, the general relations between the main blasting parameters; geology, blastability and explosives, will be applicable, and the estimation model is a very good ...

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Open pit - MAXAM

We executed a project in an iron ore mine where standard blast designs were 15-inch boreholes in 8 m x 8 m square patterns with 13,7 m of bench height and a subdrill of 1,5 m. The main concern for the operation was the low productivity and high variability in the shovel dig rates, and fumes. MAXAM partnered with the mine to improve the DB performance by adapting blast designs to improve the ...

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Blast Design Software Blasting Pattern Software Blast ...

Open Pit Blasting . BIMS BLADES Smart Blasting APP ... Generates blast plan and according to the delay pattern structure, simulation. BLAst DESigner Software (BLADES) calculates blast plan parameters, explosives charge distribution, initiation timing and sequence, results in terms of rock breakage and fragment size distribution. Charging Sheet. Generates optimized charging sheet for the blast ...

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Monitoring and control airblast overpressures in an open ...

01/02/2021  This study applied the circular model of AOp wavefronts reinforcement to fifty-four blasts at the SE pit. The blast patterns, ... A comparative study of artificial neural networks in predicting blast induced air-blast overpressure at Deo Nai open-pit coal mine Vietnam. Neural Comput. Appl., 32 (2020), pp. 3939-3955. 2020. CrossRef View Record in Scopus Google Scholar. Rachpech et al., 2014. V ...

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The Most Advanced Blast Design Optimization Platform in ...

- Open Pit Blast - Under Water Blast o-pitblast Objective - Deliver optimization services - Save cost - Direct savings - Administration Services - Mine2Mill optimization Focus. Our products o-pitblast O-Pitblast Blast Design Optimization Platform O-PitApp Field control (Android e iPhone) O-Pitblast Analytics Online Blast KPI control O-PitHolo 3D Free Face and Boulders Scan ...

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FIRING PATTERNS AND ITS EFFECT ON MUCKPILE SHAPE ...

Drilling and blasting cost in open pit mines represent 15-20% of the total mining cost [1,2,3]. Apart from the direct costs, blasting efficiency also influences down the line mining costs. Firing pattern that provides a pathway for the detonation wave of initiation for the explosive charged in the holes. In any blasting programme, the foremost requirement is sequential generation of free face ...

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open pit mine blasting - YouTube

29/11/2010  blasting in northern b.c.

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The best solution for mining operations around the world ...

The latest innovation in blast design. O-Pitblast is the bridge that connects blast managers and mining operations by figuring out a new way to design, measure, evaluate and optimize your drill and blast operations. A complete software aimed to plan, control and optimize. Information . O-PitAnalytics. All reports in one place. An integral part of the O-Pitblast platform, Analytics brings ...

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H BLASTING IN SURFACE EXCAVATION

An open chevron patterns gives evenly spread rock piles particularly suitable for front-end loaders and may produce less toe problems. 10 Figure 5: Chevron blast pattern Firing Patterns In normal blasting all holes do not blast at the same time. Bench blasting is normally carried out as short delay blasting. The firing pattern has to be designed so that each blasthole has free breakage. The ...

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