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301 – Blast and Drill A Single Value Chain Process Larry ...

Beyond taking the bench apart, the drill/blast program is the beginning of the crushing process. The optimized distribution of explosive energy as a function of drill hole diameter, accurate location, explosive product, and timing is the key to leveraging the chemical crushing result. While each site is unique, the implementation of drill and blast

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typical drill blast process flow chart - charlyshop.ch

Process flow chart for monorail drill-load-haul system PowerPoint slide Original jpg 20500KB Total Drill-Blast-load-haul cycle time per shift h 107 185... Know More underground mining blasting process

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Drill and Blast Method - railsystem.net

Drill and Blast Method. Drill and blast method is mostly used method for the excavation throughout the world. The method can be used in all types of rocks and the initial cost is lower than the mechanical method like TBM. This tunneling method involves the use of explosives. Compared with bored tunneling by Tunnel Boring Machine, blasting generally ...

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Drill And Blast Best Practices Part One: Bench

The drilling itself can be treated as an activity composed of several steps and begins long before the drill rig even reaches the workbench. The blasting plan must follow the drill, charge and timing projects. All these activities depend on one another and therefore must be planned and carried out as

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An integrated approach to the drill and blast

12-08-2020  In the mining cycle, drill and blast (DB) is arguably the first and most important step to get right. DB operations impact the entire mining process, from mining equipment efficiency, through crushing and grinding circuit performance, to recoveries and final product quality. Costs and energy usage increase throughout the comminution process.

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Blast Management Plan - Boral

An experienced Shot Firer shall oversee this process and sign off before the Blast Supervisor is permitted to oversee any further drill and blast operations. 3. Approved Operating Requirements 3.1 Mining Licence/Work Plans Regulatory Conditions Dunmore Quarry operates drilling and blasting activities in accordance with a Ministerial consent

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BEST PRACTICES IN DRILL AND BLAST - IQPC Corporate

front end – from shutting down pit up until fi ring of the blast. Controlling fume movement following the blast is not possible and the pit will remain closed until the “all clear” is established. Building the appropriate policy means it needs to be process driven, not people driven. Blast plans are mandatory to ensure that blasts can be

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US3877373A - Drill-and-blast process - Google

Working, e.g., excavating, a geological mass by a succession of substantially continuous drill-load-blast sequences, each sequence comprising drilling a hole in the mass, placing a charge of condensed secondary explosive in the hole, and initiating the charge by projecting propagative energy, e.g., the kinetic energy of a high-velocity projectile, through an inactive medium, e.g., the atmosphere, to the

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Drilling and Blasting Technical Aspects of Mining ...

Most blasting in mines involves charging explosives into holes drilled in rock. The entrance or mouth of a drill hole is called the collar and the end is the toe. Drilling is still carried out in some cases, in the ASM sector, by hand, using a hammer and chisel. This is obviously tedious and slow, especially in hard-rock mining conditions.

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typical drill blast process flow chart - charlyshop.ch

A computer simulation model of a monorail. Process flow chart for monorail drill-load-haul system PowerPoint slide Original jpg 20500KB Total Drill-Blast-load-haul cycle time per shift h 107 185...

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An integrated approach to the drill and blast

In the mining cycle, drill and blast (DB) is arguably the first and most important step to get right. DB operations impact the entire mining process, from mining equipment efficiency, through crushing and grinding circuit performance, to recoveries and final product quality. Costs and energy usage increase throughout the comminution process.

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301 – Blast and Drill A Single Value Chain Process Larry ...

Beyond taking the bench apart, the drill/blast program is the beginning of the crushing process. The optimized distribution of explosive energy as a function of drill hole diameter, accurate location, explosive product, and timing is the key to leveraging the chemical crushing result. While each site is unique, the implementation of drill and blast

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302 –Blast and Drill A Single Value Chain Process

Blast Confinement A controllable factor in building the Chemical Crusher • Design to confine the explosive energy so that it can do effective work. Amount of material surrounding the explosive in the drill hole Material between the drill hole and any static or dynamic free space. Distance of the drill hole from an open face. Face burden

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A uniquely holistic approach to the drill and

Blast design. A holistic approach to the drill and blast process starts with a well-designed blast pattern, effectively executed using high-precision drills; it includes proven fragmentation analysis and blast monitoring solutions that minimise loss and dilution and delivers the data necessary for the next blast pattern design; and it ensures a continuous DB feedback loop underpinned by technology that not

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OPTIMIZATION OF DRILLING AND BLASTING PRACTICES AT A ...

2.5.1.2. Sub drill Depth ... 4.2.1. Blast #3053 ... The mining process begins with drilling and blasting activities, and these unit operations have a significant impact on downstream processes such as loading, hauling, crushing and

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Digitising the blasting process - Aggregate

The drill and blast process typically equates to 20% of mining extraction cost per tonne and Maptek says there are significant opportunities for improvement and cost reduction. “In practice this could mean developing effective designs that align drill pattern, charge and tie-up plans to the specific mining conditions and measuring their successful execution,” the company comments.

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PROCEDURES FOR BLASTING - NYSDOT Home

Blast Pattern – The plan view of the drill holes as laid out for blasting. Blast Plan – A written procedure that details the methods and manner by which a Project blaster will comply with pertinent laws, rules, regulations, and contract documents.

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Drilling and blasting powerpoint 2003 - SlideShare

ABRASION DRILLS DEFINITION- Grind rock into small particles through abrasive effect of bit that rotates in hole. TYPES- 1.Blast-hole drills 2.Shot drills 3.Diamond drills Blast hole drills- Rotary drill consisting of steel pipe drill stem on bottom of which is roller bit

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Rock blasting for mining - SlideShare

24 The process of blasting includes the following stages: 1. Creation of blast holes and cleaning by using suitable tools. 2. The charge of explosives and place them at the breaking ends. 3. Filling of the remaining portion with clay and tamping. 4. Insertion of Fuse and keep it projecting 15- 20 cm above the rock surface. 25. 25 5.

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302 –Blast and Drill A Single Value Chain Process

Blast Hole Pressure > Rock UCS Step 1=Pulverized Zone Blast hole diameter expanded Explosive Pressure Blast Dynamics Stress / Pressure Dissipation pressure in rock from blast Blast Holes Step 4 =Damage limit to rock

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301 – Blast and Drill A Single Value Chain Process Larry ...

Beyond taking the bench apart, the drill/blast program is the beginning of the crushing process. The optimized distribution of explosive energy as a function of drill hole diameter, accurate location, explosive product, and timing is the key to leveraging the chemical crushing result. While each site is unique, the implementation of drill and blast

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Basic Tools for Process Improvement

Basic Tools for Process Improvement 2 FLOWCHART What is a Flowchart? A Flowchart is a diagram that uses graphic symbols to depict the nature and flow of the steps in a process (Viewgraph 1). Another name for this tool is "flow diagram." When should teams use Flowcharts? At the beginning of your process improvement efforts, an as-is Flowchart helps your

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Digitising the blasting process - Aggregate

The drill and blast process typically equates to 20% of mining extraction cost per tonne and Maptek says there are significant opportunities for improvement and cost reduction. “In practice this could mean developing effective designs that align drill pattern, charge and tie-up plans to the specific mining conditions and measuring their successful execution,” the company comments.

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Drill-and-blast process - E. I. DU PONT DE

This invention provides an improved drill-and-blast process in which secondary explosive charges confined in drill holes in a geological mass to be worked, e.g., rock, are initiated by the rapid release therein of energy projected to the charges in the drill holes through an inactive medium, e.g., the atmosphere, rather than via a continuous reaction train containing a primary explosive.

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PROCEDURES FOR BLASTING - NYSDOT Home

Blast Pattern – The plan view of the drill holes as laid out for blasting. Blast Plan – A written procedure that details the methods and manner by which a Project blaster will comply with pertinent laws, rules, regulations, and contract documents. The plan shall

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Controlling fragmentation - Orica Mining Services

of broken ore on explosives at the drill and blast stage. Yet, the blasting process is a much more energy efficient method of fragmenting rock. The need for energy efficient processing is becoming increasingly important as we continue to mine lower grade deposits and need to process (fragment) increasing amounts of rock

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Drilling and blasting powerpoint 2003 - SlideShare

TOOLS FOR BLASTING1.Dipper 2.Jumper3.Priming needle 4.Scraping spoon5.Tamping bar Dipper- Used to drill hole to the required depth. Jumper- Used to make blast hole more effective in boring a nearly vertical hole. Priming needle- Used to maintain the hole while tamping is done is in the form of a thin copper rod with a loop at one end. Scraping spoon- Used to remove dust of crushed stone from

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Optimized design of drilling and blasting

01-11-2018  Number of drill holes: 19,628: 17,447: Total blasting production (Mt) 23.78: 30.02: Bit cost component ($/ft) 17.17: 20.60: Drilling operation cost (M$) 1.475: 1.767: Blasting operation cost (M$) 4.936: 6.247: Total drilling and blasting costs (M$) 6.411: 8.014: Explosive mass in one drill hole (kg) 237.22: 337.76: Explosive volume in one drill hole (m 3) 0.297: 0.422

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Blast plan preparation, including mining operations - guide

• control the blast process from design to initiation, evaluation and misfire treatment • implement a review process to ensure that the objectives are met • assure the safety of the public, site personnel and surrounding properties. It is a regulatory requirement that the blast plan be followed. Components of the blast plan may be

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302 –Blast and Drill A Single Value Chain Process

Blast Hole Pressure > Rock UCS Step 1=Pulverized Zone Blast hole diameter expanded Explosive Pressure Blast Dynamics Stress / Pressure Dissipation pressure in rock from blast Blast Holes Step 4 =Damage limit to rock

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Drill-and-blast process - E. I. DU PONT DE

This invention provides an improved drill-and-blast process in which secondary explosive charges confined in drill holes in a geological mass to be worked, e.g., rock, are initiated by the rapid release therein of energy projected to the charges in the drill holes through an inactive medium, e.g., the atmosphere, rather than via a continuous reaction train containing a primary explosive.

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PROCEDURES FOR BLASTING - NYSDOT Home

Blast Pattern – The plan view of the drill holes as laid out for blasting. Blast Plan – A written procedure that details the methods and manner by which a Project blaster will comply with pertinent laws, rules, regulations, and contract documents. The plan shall

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Calculations and terms used in drill and blast

Abstract: This publication provides brief explanations and examples of the most commonly used calculations, formulae and terms used in the drilling industry. Sections cover: - quick reference materials (eg. summary of metric terms, conversion factors, common area and volume formulae) - complex formulae (area of triangles and other shapes, volume of ...

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Reducing the Cost of Drill and Blast through Blast Design ...

blast patterns have undergone significant pattern expansion of 33% (total influenced area) with no adverse effects on the mining process. The flow on affects of such a significant pattern expansion has led to a number of benefits as detailed below; • Reduction in powder factor by 37% • Reduction in blasting cost per 20m bench by 21%

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Blast plan preparation, including mining operations - guide

• control the blast process from design to initiation, evaluation and misfire treatment • implement a review process to ensure that the objectives are met • assure the safety of the public, site personnel and surrounding properties. It is a regulatory requirement that the blast plan be followed. Components of the blast plan may be

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(PDF) Reducing Drill and Blast Cost through Blast ...

The esti mated total drill and blast cost savings if the proposed blast parameters were adopted ranged from 5.3 to 12.2 % for ore zones and 2.9 to 14.8 % for waste zones.

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JAn 203 1 of 21 Surface Blasting Safety Procedures

Blast Site The area explosive materials are handled during loading that includes a 30 foot perimeter around the loaded blast holes. This perimeter must be demarcated with signs stating “Danger”, Explosives”, or “Keep Out” and green cones.. Blocker Any person designated by the Blast Foreman or his designee to perform a blocking operation.

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Blasting damage in rock - Rocscience Inc.

The correct design of a blast starts with the very first hole to be detonated. In the case of a tunnel blast, the first requirement is to create a void into which rock broken by the blast can expand. This is generally achieved by a wedge or burn cut which is designed

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Safety/Security drills and instructions 1. Generalities

drill must include: 1/ Operation of the main steering gear from within the steering gear compartment.2/ Operation of the means of communications between the navigating bridge the steering compartment. 3/ Operation of the alternative power supply for the steering gear if the vessel is so equipped.

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