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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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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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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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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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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Controlled Blasting: Enhancing Safety & Productivity with

Pre-splitting blast at a Coal Mine ERG Industrial. Safety & Wall Stability. Ensuring stable high walls is of utmost importance in any project, be it open-pit mines, quarries, or civil engineering endeavours. Pre-splitting is a technique used to establish a secure boundary between the blasted material and intact rock.

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Controlled Blasting using Muffling Technique- A Case …

Muffle blasting is a technique used in controlled blasting to arrest the fly-rocks in the blast area itself using blast mats and shields made up of rubber-like mate- rial.

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Basic blasting | PPT

The document discusses techniques for open pit mining blasts, including: - Major factors like attitude, communication, blast design, and geological effects influence blast efficiency - Proper blast design considers uniform energy distribution, confinement, energy level, and design adjustments for conditions - Geological effects like rock properties, structure, water, and seam …

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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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PPT

Abrasive blasting methods significantly enhance efficiency by achieving smooth, clean surfaces quickly. These techniques efficiently remove rust, paint, and other contaminants, ensuring surfaces are perfectly prepared for the next step. ProStrip Sandblasting offers high-quality, eco-friendly abrasive blasting services for both homes and businesses, delivering fast, …

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PPT BY SUJIT COMPLET.pptx it is controlled blasting techniques …

2. Introduction As we all know Control blasting is a crucial technique used in various industries such as mining, construction, and civil engineering. Its primary purpose is to ensure that explosive operations are carried out with precision and safety, minimizing risks while maximizing efficiency Increased population and spread of urbanization near to the construction …

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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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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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Deep compaction techniques | PPT

Rammed stone column: This installation technique was proposed by Datye and Nagaraju (1977) and was developed by Nayak (1982). In this technique, the granular fill is introduced into a pre-bored hole and compacted by a heavy rammer through the borehole. The hole is made by using normal bored piling rig with winch, bailer and casing.

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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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Controlled Blasting In Cutting.

Better control of fly-rock. ... The payment may be related to 1) length of blast holes per cum. 2) penalty for overbreak etc. By use of controlled blasting technique long term safety of the railway cuttings can be achieved. ... 36 * Dhanyawaad * * * * Jai-Hind * Download ppt "Controlled Blasting In Cutting." Similar presentations . Chapter 13 ...

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Control Blasting | PDF

CONTROL BLASTING - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Controlled blasting techniques aim to reduce adverse impacts of blasting such as over-break, ground vibrations, rock fractures, noise, and waste. Key techniques include line drilling, trim blasting, smooth blasting, pre-splitting, and selecting blast …

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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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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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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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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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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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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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Drilling And Blasting Technology

Week 8: Safety, Environmental impact and economics of rock blasting Week 9: Special blasting techniques – 1: Techniques of boulder blasting, Deck charging techniques, Consideration of rockmass conditions for surface and underground blasting Week 10: Special blasting techniques – 2 : Controlled blasting techniques, Cast blasting techniques, Hot hole blasting techniques, …

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BLASTING FOR REDUCED ROCK DAMAGE AND CONTROLLING STABILITY

11 BLASTING TECHNIQUES FOR DAMAGE REDUCTION Ensuring ... Delays be used to control the maximum instantaneous charge to ensure that rock breakage does not occur in the rock mass, which is supposed to remain intact. ... Download ppt "BLASTING FOR REDUCED ROCK DAMAGE AND CONTROLLING STABILITY" Similar presentations

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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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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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Special Blasting Technique

155456887-Special-Blasting-Technique.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. This document discusses special blasting techniques called trim blasting and pre-split blasting used for controlling the strength and stability of interim and final pit walls during mining.

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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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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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Controlled Blasting | PDF | Drilling | Mining

Controlled Blasting - Free download as PDF File (.pdf) or view presentation slides online. In both the mining and construction industries, blasting is the predominant method for fragmentation of consolidated mineral deposits and rocks. The public relation problems of users of explosives have increased greatly in the past few years as explosives are being consumed in increasing …

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