Showing 01 - 12 of 139 Results

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blast pattern Mining and Blasting

Oct 12, 2012· 2. Contemplation of Blast Design: Blast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata & geology etc., makes blaster to achieve perfection. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Not only do these provide evidence of the quality of his work, but they also

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Designing Blast Patterns Using Empirical Formulas

making first approx:f_mations of drilling and blasting patterns, with geologic considerations; suggested sequence of steps in planning the blast design; generalized blasting pattern views that may be used; and direct comparisons

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Chapter 8 BLAST DESIGN National Park Service

of explosive energy be placed into proper perspective within the entire drilling, blasting, handling and process-ing operation. This relationship is illustrated in Figure 8-7. (Figure 8-7) Analysis of efficient blast design.. Efficient blast designs combined with the proper choice of explosive can produce better fragmentation with

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Blasting

Blasting . Explosives . Drift or Tunnel Blasting . Blast Pattern Design . Firing Sequence . Smooth Wall Blasting . Supporting . Objective . Material Used and reinforced . Typical rockbolt systems . Wire Mesh . Shotcrete . Steel Set Systems . Timber Support Systems

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Drill & Blast Pattern Design EXEL Drilling Mackay

As part of our Drilling & Blasting services we offer specialised computer-assisted drill and blast pattern design. Using state-of-the-art blast design and management software, our technical staff create optimised blasting designs, empowering us to conduct precision blasting within even the most sensitive or restrictive of parameters.

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Blast Design Software Blasting Pattern Software Blast

Blast Design. 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.

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Drill and Blast Method railsystem

Several factors must be taken into account when designing the drilling pattern: rock drillability and blastability, the type of explosives, blast vibration restrictions and accuracy requirements of the blasted wall etc. The basic drilling & blasting factors, and drilling pattern design are discussed below.

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The basic patterns of drill holes employed in opencast

• Diagonal blasting pattern:-• This type of blasting pattern is carried out in benches where the cleavage plane of the rock is parallel to length of the face. • This pattern reduces secondary blasting. • The blast holes can be drilled in square or staggered pattern.

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Advanced Firing Sequence in Surpac 6.7.1: Drill and Blast

Apr 06, 2017· The Advanced Blast Firing Sequence Design functionality in GEOVIA Surpac™ 6.7.1 allows users to graphically tie, untie and edit blast holes in a given blast pattern so that the blast

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H BLASTING IN SURFACE EXCAVATION

Blast Design The best use of explosives is made when a blast produces a clean break, giving good fragmentation, while avoiding excessive fly-rock. The success of achieving these goals depends significantly on good blast design. If the blastholes are drilled as a staggered pattern on an equilateral triangular grid, the optimum distribution of the

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Blasting pattern design 1 Underground Mining -Theory

Aug 11, 2019· It is desirable that blasting pattern is simple in order to be easily drilled at site. Therefore, it is best practice to align boreholes in rows or to follow alignment as much as possible. After design it is necessary to determine basic blasting parameters as follows.

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Drilling and blasting powerpoint 2003 SlideShare

Apr 21, 2012· DRILLING PATTERNS Selection of drilling pattern varies with the type and size of the drill’s used, depth of hole, kind of rock, quantity, rapidity of the explosive & amount of steaming. 13. BLASTING DEFINITION- The process of breaking rocks into smaller pieces by use of explosives. TYPES OF EXPLOSIVES- Explosives based on stone nature

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Underground Drilling and Blasting Training DVD ACG YouTube

Oct 24, 2012· Underground Drilling and Blasting Training DVD ACG Australian Centre for Geomechanics This DVD will review drilling and blasting fundamental concepts that are critical to achieving optimal

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(PDF) Drilling and blasting as a tunnel excavation method

Drilling and blasting as a tunnel excavation method. The design of the drilling pattern can now be carried out and the Drilling and blasting technology is one of the main methods for

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(PDF) ROCK BLASTING FOR MINING ResearchGate

ROCK BLASTING FOR MINING. Steps involved in blasting c) Blast design and patterns d) Methods of blasting e) Controlling factors of Blasting. Hence drilling and blasting are considered to

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TUNNELS, SHAFT AND DEVELOPMENT HEADINGS BLAST

TUNNELS, SHAFT AND DEVELOPMENT HEADINGS BLAST DESIGN INTRODUCTION other design elements can be adjusted to improve round design. Drill patterns and explosive loads can be modified, and within drilling equipment limits, hole-size can be changed. Shaft, and Development Headings Blast Design . )

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Best practices: Drilling and blasting : Pit & Quarry

Dec 07, 2015· P&Q: Aside from the issue of separating drilling from blasting, are there any other issues related to blasting that should be addressed at quarries? Mirabelli: Another big shortfall I see a lot is implementation of the blast pattern to the bench. Often, quarries will adjust their blast design to

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Blast Design Software Blasting Pattern Software for Mining

Empirical formulas have been applied to the drilling and blasting pattern design. BLADES provide the following features:- Generates optimized charging sheet for the blast. Generates blast plan and according to the delay pattern structure, a simulation of the blasting model can be watched.

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A Pattern For Improvement Agg-Net

a pattern for improvement_0.pdf; of this stone was requested to improve the productivity of the front-end loader by attempting suitable changes in the blast-design parameters to increase overall production and productivity at the quarry. All the blasts were drilled using a staggered drilling pattern with ANFO explosive and sensitized

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Rock Engineering Practice & Design ISRM

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

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A New Perimeter Control Blast Design Concept for

range of blast patterns, cut designs, hole spacings for the perimeters, the number of empty holes and spacing for line drilling, perimeter burdens, explosive types used, use of perimeter hole decoupling to prevent damage, blast round length, and variability in cross-sectional arch design

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Determining minimum burdens for quarry blasting

Changes to Blast design following the introduction of the MEMU Truck The size of the shot-hole diameter increased from 95mm to 110mm. The drill pattern opened up from 3m x 3m (burdens & spacings) to 4m up to 6.5m. The overall number of shot-holes reduced when blasting

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Optimized design of drilling and blasting operations in

Most previous works have focused on drilling and blasting just in terms of costs reduction by different means. Afeni and Afum et al. tried to investigate the cost effects of different drilling equipment and blasting patterns respectively in two open pit mines through experimental and onsite observations,.

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Rock Engineering Practice & Design ISRM

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

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A New Perimeter Control Blast Design Concept for

range of blast patterns, cut designs, hole spacings for the perimeters, the number of empty holes and spacing for line drilling, perimeter burdens, explosive types used, use of perimeter hole decoupling to prevent damage, blast round length, and variability in cross-sectional arch design

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Determining minimum burdens for quarry blasting

Changes to Blast design following the introduction of the MEMU Truck The size of the shot-hole diameter increased from 95mm to 110mm. The drill pattern opened up from 3m x 3m (burdens & spacings) to 4m up to 6.5m. The overall number of shot-holes reduced when blasting

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Optimized design of drilling and blasting operations in

Most previous works have focused on drilling and blasting just in terms of costs reduction by different means. Afeni and Afum et al. tried to investigate the cost effects of different drilling equipment and blasting patterns respectively in two open pit mines through experimental and onsite observations,.

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Pattern Drilling Jobs, Employment Indeed

118 Pattern Drilling stone available on Indeed. Apply to Blaster, Underground Miner, Monitors the relationship between blast pattern and type of digging and reports results to Blasting Supervisor or Project Superintendent. Assist in drill and blast pattern design layout.

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osmre.gov

osmre.gov

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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, tunnel or road construction. The result of rock blasting is

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Blog Mining Consultant MineBlog

Drilling & Blasting By Furkan Kasa 7 October 2016 3 Comments. Open Pit Blasting Pattern Design Here is a new style of form that has calculation of Open Pit Blasting Pattern Design. With this form you can register your email and then calculated fields will be sent to you via e-mail with pdf format. I think this form is more useful and easier way

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Blast design in opencast mining SlideShare

Oct 12, 2017· Outline • Introduction • Drilling • Explosive used in opencast mine • Types of variables in blast design • Blasting patterns used in Indian opencast mines • Concept of optimum blasting • Conclusion 3. Introduction • Drilling and blasting is the major unit operation. • Basic objective should be optimum fragmentation.

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Raise Design and Operations Blasting

To develop a slot, there must be void space within the pattern design itself. Slots can be taken in a series of blasts, but the preference is to develop a slot in one blast because of the continuing safety issues around working in previously blasted zones of rock or ore. The drilling and blasting process is similar to drifting but the

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PROCEDURES FOR BLASTING NYSDOT Home

PROCEDURES FOR BLASTING GEOTECHNICAL ENGINEERING MANUAL GEM-22 Revision #4 AUGUST 2015 . include topography, blast design, and atmospheric conditions. Blasts may have to be Blast Pattern The plan view of the drill holes as laid out for blasting.

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Drilling & Blasting EXEL Drilling Mackay

EXEL Drilling: Partnering with industry. EXEL Drilling is your dependable partner in drilling, blasting and a wide range of ancillary services. Specialising in all aspects of drilling and blasting, EXEL Drilling is a reputable supplier to industry and production throughout Central and North Queensland.

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An Open Pit Bench Blasting Application Mining Consultant

Dec 09, 2016· Drilling: Drill the holes according to the pattern design. Fill the holes: Fill the holes with explosive material and then stemming with raw material (you can fill with material that extracted from hole by drilling machine). Do not forget to get a good stemming. Correct stemming will give you controlled and smooth blasting results.

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Trench Blasting with DYNAMITE Dyno Nobel

tered. Drill patterns may be adjusted to accommodate rock types. Unimax is best suited for massive rock forma-tions, surface or moderate water conditions, and where drill patterns can be kept within design parameters. The best initiation system for trench blasting, electric or nonelectric, uses detonators designed to resist transient dynamic shock.

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PROCEDURES FOR BLASTING NYSDOT Home

PROCEDURES FOR BLASTING GEOTECHNICAL ENGINEERING MANUAL GEM-22 Revision #4 AUGUST 2015 . include topography, blast design, and atmospheric conditions. Blasts may have to be Blast Pattern The plan view of the drill holes as laid out for blasting.

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Drilling & Blasting EXEL Drilling Mackay

EXEL Drilling: Partnering with industry. EXEL Drilling is your dependable partner in drilling, blasting and a wide range of ancillary services. Specialising in all aspects of drilling and blasting, EXEL Drilling is a reputable supplier to industry and production throughout Central and North Queensland.

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An Open Pit Bench Blasting Application Mining Consultant

Dec 09, 2016· Drilling: Drill the holes according to the pattern design. Fill the holes: Fill the holes with explosive material and then stemming with raw material (you can fill with material that extracted from hole by drilling machine). Do not forget to get a good stemming. Correct stemming will give you controlled and smooth blasting results.

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Trench Blasting with DYNAMITE Dyno Nobel

tered. Drill patterns may be adjusted to accommodate rock types. Unimax is best suited for massive rock forma-tions, surface or moderate water conditions, and where drill patterns can be kept within design parameters. The best initiation system for trench blasting, electric or nonelectric, uses detonators designed to resist transient dynamic shock.

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Burden And Spacing Relationships In The Design Of Blasting

A smaller burden produced enough mass and large new surface. Multihole tests showed the relationships between burdens, spacings and fragmentation. The results of the study were applied to modify blasting patterns for cut-and-fill stopes in a lead-zinc mine. A systematic method of modifications or design of blasting patterns is suggested. SOMMAIRE:

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APPENDIX B Blasting Plan Pilgrim Pipeline

Pilgrim Pipeline Project 3 Appendix B Blasting Plan D. Drill and Blast Pattern 1. Typically the drilling program will be based on 1 row of 2-1/2” to 3” inch diameter holes drilled with a grid spacing of approximately 2-1/2 feet to 4 feet along the ditch line. The approximate depth of the drill and blast

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The Effect of Drilling and Charging Design on Cost of

in the blast is the bore hole diameter and it controls the distribution of energy in the blast and thus affects fragmentation. empirical models which are based on blast design parameters, Large diameters holes are often associated with expanded drilling patterns; however large holes intersect fewer in-situ

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Appendix M. Blasting Plan Bureau of Land Management

Appendix M. Blasting Plan. June 2010 Draft Blasting Plan Drill and Blast Pattern The drilling program will be based on 2 rows of 2-1/2 inch diameter holes drilled with a grid will be brought to the attention of the blaster and noted on the blast report. The shot pattern and/or loading will be adjusted to minimize or eliminate overbreak.

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Deswik.OPDB (Open Pit Drill and Blast Design)

Construct hole templates with design parameters such as fixed or variable collar or toe spacing, angle changes and variable toe horizons. Audit drill patterns against blast

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Drilling and Blasting MADEN

Drilling and Blasting . lä" International Mining Congress and Exhibition of Turkey-IMCET 2003, «? 2003, ISBN 975-395-605-3 south and east sides of the mine. In conventional core drilling method a complete analysis cannot be performed due to the lack of core orientation. Orientation of the core can be open pit mine design. The

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Pattern drilling for numerous materials and alloys

Pattern drilling is a technique that is used when a sequence of holes must be drilled within a very tight locational tolerance or array, often involving a variety of sizes, depths and dimensional orientations.

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MODERN DRILLING AND BLASTING TECHNOLOGY AT THE

on-the-fly pattern design, and real-time drill parameter changes will also be discussed. INTRODUCTION The Minntac Mine is a large taconite mining operation in Northern Minnesota. Drilling and blasting requirements include one million feet of drilling per year producing 75 million long tons of crude ore and waste rock.

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02090 Blasting Controls Juneau

SECTION 02090 BLASTING CONTROLS STANDARD SPECIFICATIONS FOR CIVIL ENTGINEERING BLASTING CONTROLS PROJECTS AND SUBDIVISION IMPROVEMENTS Page 02090 2 December 2003 Blasting Consultant, to the ENGINEER for review. The Blasting Plan shall contain the details of the drilling and blasting patterns and controls proposed for

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Blasting pattern design 1 Underground Mining -Theory

Aug 11, 2019· Blasting pattern design 1 Print Details Category: Design Published: 11 August 2019 Created: 11 August 2019 Last Updated: 21 August 2019 Hits: 1665 Blasting Design We are going to give an example on blast pattern design for the case of underground drift (4 x 3m) with rectangular cross section. Drilling: Hole diameters = 51mm