Controlled Blasting Techniques-2011 | PDF | Drilling
1. Controlled Blasting Techniques-2011 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. The document discusses various controlled blasting techniques used in civil and infrastructure projects to reduce damage to the surrounding rock mass and limit overbreak. It describes techniques like presplit blasting, …
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Dust control practices in open cast mining industry. | PPT
This ppt gives the idea of the suitable techniques in a cost effective way. Read less. Read more. 1 of 35. ... Preventive Technique Figure 7- Blast hole having water filled Ampoule ... Nair, P K and Sinha, J K, 1987. "Dust control at deep hole drilling for open pit mines, development of a dust arrester", Journal of Mines, Metals and Fuels ...
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Rock Blasting Fundamentals | PPT
The purpose of controlled blasting is to reduce this perimeter cracking and thus increase the stability of the opening. Four types of control blasting techniques include the following, with the first two being more …
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Chapter 10 Contour Blasting Technique for Surface …
Fig. 10.1 Comparison between the results achieved using control blasting (on the left) and normal ... 326 10 Contour Blasting Technique for Surface Excavation † Function of decoupling As the presplitting or smooth blasting holes are loaded with decoupled charges, the effective pressure of the shock waves and gas on the borehole wall is cushioned
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Blasting | PPT
Blasting - Download as a PDF or view online for free. ... 14 likes • 3,937 views. J. Jayant Mewara Follow. This PPT contains data about What Blasting is, Explosives used in Blasting and there types, Magazine Building, Tools used in Blasting, Precaution in Blasting, Misfire. Read less. Read more. 1 of 17. More Related Content.
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Types of Sandblasting Techniques
Explore the various types of sandblasting techniques including dry blasting, wet blasting, and soda blasting. Each method has unique applications and advantages, making them suitable for different surfaces and materials.
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Blasting concepts (1) | PPT
Sequential Blasting Machine It has been developed by research Energy of Ohio. It is a solid state condenser discharge blasting machine that can initiate up to 10 individual blasting circuits in a sequence. With programmable time intervals between circuit can be adjusted from 1 ms to 999 ms. Accessories-Extension cable, Terminal board, Load plug ...
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Blasting PPT | Explosive | Techniques
Blasting PPT is a presentation that outlines the techniques and principles of blasting in construction and mining. It explains the different types of explosives used, safety measures, …
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Blasting
Blasting Safely with Proper Techniques The most important responsibility of the blaster in charge is to prepare and fire safely. They are to practice safety in transportation, storage, handling, …
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An Overview of Drilling and Blasting in Mining
Various methods of blasting have been incorporated in mining, such as: 1. Surface Blasting: Applied in open-pit mining, surface blasting ensures the effective fragmentation of large rock masses. Controlled Blasting: This method …
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Blasting
Blasting Regulations Explores the requirements on blasting operators contained in 29 CFR, BATF and DOT. 16 slides: Blasting Regulations Regulatory requirements for NCDOT blasting operations. 19 slides: Blasting Safely with Proper Techniques The most important responsibility of the blaster in charge is to prepare and fire safely.
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Flyrocks mitigation | PPT
Modified Blast Design RESULTS BLAST BLAST NO.2 BLAST NO.3 BLAST NO.4 FLYROCKS, m 10 16 8 12 30. CASE STUDY 2 • DATE-September 22nd 2010, at 17hr 10min • Working place - Quality Control …
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Optimisation of drilling and blasting focussing on …
• Download as PPT, PDF ... Fly rock can be controlled by introducing better initiation techniques. All these factors are related to blast design and thus the fly rock can be significantly controlled by improving the existing …
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Blasting PPT | Explosive | Techniques
Blasting PPT is a presentation that outlines the techniques and principles of blasting in construction and mining. It explains the different types of. ... along with methods to control these effects. This resource is ideal for engineers, students, and professionals involved in excavation and demolition projects. ...
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Explosives and blasting in underground coal mining | PPT
9. BLASTING ON A PRE-CUT FACE In many mines coal-cutting machines are used to provide an additional free face for blasting.While this may be under, over, middle or side cut, the most common practise in Indian mines is to have undercut face. For blasting on cut faces the following conditions must be compiled with: The length of the shot hole should be at least …
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Contour Blasting Technique for Surface Excavation
Contour blasting is also called controlled blasting as its main purpose is to minimize the damage to the rock (overbreak) beyond the boundary of the designed contour of the excavation (Fig. 10.1).These techniques are used in both …
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Controlled Blasting | PDF | Drilling
Controlled Blasting.pptx - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. The document discusses techniques for controlled blasting used to minimize …
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Groundwater recharge techniques | PPT
Aquifer modification techniques aim to increase the water storage and flow capacity of aquifers through actions like bore blasting, hydro-fracturing, grouting, and stream blasting. Artificial recharge has benefits like enhancing water supplies, improving water quality, and preventing issues like saline intrusion and land subsidence.
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Drilling and blasting | PPT
4. DRILLING AND ITS NECESSITY Drilling is the process of making hole in solid materials like rocks, timber, metal, etc. For blasting rocks, drilling is necessary to make hole in the rock to place explosive in the drill hole. …
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Types of Sandblasting Techniques
Explore the various types of sandblasting techniques including dry blasting, wet blasting, and soda blasting. Each method has unique applications and advantages, making them suitable for different surfaces and materials. ... Precise control ideal for delicate items - Slower may require multiple passes ... With time and practice, the technique ...
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Blasting Techniques Used in Underground and Opencast Mines | Mining
Read this article to learn about the blasting techniques adopted in underground and opencast mines. Blasting Techniques Adopted in Underground Mines: Drilling Patterns in Stone: Drilling patterns, also called shot-hole patterns, are named after the type of cut holes used and the principal patterns are: (1) Pyramid cut or cone cut (2) Wedge cut (3) Drage cut (4) Fan cut (5) …
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Design of controlled blasting (pre-splitting) in Golegohar …
Controlled blasting techniques were used to control over-breaks and to aid in the stability of the remaining rock mass at Rampura Agucha open-pit mine in India. The mine is a lead zinc mine ...
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Blasting Misfire: A Review of Causes, Economic Effect, Control …
Usually blasting related injuries are related to fly rocks, lack of blast area security, premature blast and misfire. Out of these, fly rocks and lack of security accounts for 68% of total ...
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Full Wall Control Blasting Optimization
This can be done with a variety of blasting techniques, all of which decrease the explosive energy towards the final wall. Each technique needs to suit the geology: modified …
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Blast design in opencast mining | PPT
Blast design in opencast mining - Download as a PDF or view online for free. Submit Search. ... the technique of decking is to divide the explosive column into two or more charges using inert materials. It confines explosive gases to assure better energy distribution for soft seam. Minimum deck thickness= 6 times of hole diameter.
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Techniquntrolledblasting 091217003405-phpapp01 | PPT …
7. Smooth (contour or perimeter) blasting: A technique used mostly in underground blasting, closely spaced drill holes are loaded with decoupled charges and fired simultaneously to produce an excavation contour without fracturing or damaging the rock behind or adjacent to the blasted face. For promoting safety and economy in underground workings, …
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BLASTING FOR REDUCED ROCK DAMAGE AND …
BLAST DAMAGES The blast damage refer to any deterioration of the strength of the remaining rock/block due to the presence of blast induced cracks and extension of pre-existing or newly …
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Dust control measures | PPT
46 Water infusion • Water infusion is a dust control technique involving the injection of water under pressure into the coal seam-ahead of the face • One or more boreholes of 75 mm diameter are drilled into the seam in …
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Blasting accessories (2) | PPT
3. 1. INTRODUCTION Parallel to evolution of explosives, different blasting accessories which include various initiating devices and blasting assisting equipments are developed in an attempt to obtain following objectives: Energetic initiation of the modern explosives, which is much more insensitive than classical dynamites but also safer. Control …
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How to Carry out Controlled Blasting of Rocks?
The main objectives of controlled blasting techniques are to minimize the overbreak and fracturing of rock beyond the designated boundary of excavation to achieve smooth post-blast surface and to control wild flyrock and ground …
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