ARblast: All Resources on Blasting - Office of Surface Mining

Rules, Regulations, Research and Resources. The Federal Surface Mining Control and Reclamation Act of 1977 requires that coal mine blasting be limited based on the site conditions so as to prevent: injury to persons, damage to public or private property outside the permit area, adverse impacts on any underground mine, and change in the course, channel, or availability of surface or ground ...

Citizen's Guide to Coal Mine Blasting in Indiana

Blast Schedule The permittee (mining company) must publish a blasting schedule in a newspaper of general circulation in the vicinity of the blasting site at least once a year (See Figure 1). The blasting schedule must be distributed to each residence, utility, etc. within one-half mile of blast area. This schedule includes information

Detonation velocity - Wikipedia

Explosive velocity, also known as detonation velocity or velocity of detonation (VoD), is the velocity at which the shock wave front travels through a detonated explosive.The data listed for a specific substance is usually a rough prediction based upon gas behavior theory [citation needed] (see Chapman-Jouguet condition), as in practice it is difficult to measure [citation needed].

Table of explosive detonation velocities - Wikipedia

This is a compilation of published detonation velocities for various high explosive compounds. Detonation velocity is the speed with which the detonation shock wave travels through the explosive. It is a key, directly measurable indicator of explosive performance, but depends on density which must always be specified, and may be too low if the test charge diameter is not large enough.

Detonation Velosity In Blastting Mine

Detonation Velosity In Blastting Mine. Velocity of detonation vod is the velocity at which the shockwave travels through an explosive charge upon detonation the shottrack vod 305 is the next generation vod monitor designed and manufactured for easeofuse refined performance and …

Influence of density of emulsion explosives on its ...

resulted in the variation of detonation velocity from 3262 to 4624 m/s. Keywords: Blasted muckpile, detonation velocity, emul-sion explosives density, opencast mines. THE primary objective of blasting in a mine is to properly fragment the rock mass so that the muckpile can be effi-ciently and economically excavated, loaded and trans-

Velocity of detonation (VOD) measurement techniques ...

Keywords: Velocity of Detonation (VOD), Confined, Shock wave, Slurry, Blast hole 1 Introduction Explosives are used extensively for mining and other civil use like tunnel, well making, building demolition etc. The performance of explosive invariably depends on the Velocity Of Detonation. The rate at which the detonation wave

blast pattern – Mining and Blasting

Understanding theory of detonation of explosives– The self-sustained shock wave produced by a chemical reaction was described by Chapman and Jouquet as a space.This space of negligible thickness is bounded by two infinite planes – on one side of the wave is the unreacted explosive and on the other, the exploded gases as shown in the Fig. 1.There are three distinct zones:a) The undisturbed ...

Blasting - LinkedIn SlideShare

Nov 19, 2013· blasting 1. blasting most basic unit operation of any mining activity 2. objective • rock is blasted either to break in to smaller pieces such as in most mining and quarrying operations or large blocks for dimensional stone mining and some civil engineering application, or to create space.

Influence of Gassing Agent and Density on Detonation ...

Jul 21, 2017· The demand for coal from surface mining projects are on the higher side like never before for which blasting is the basic unit operation. The explosive plays an important role in blasting and also influence the explosive-rock interaction. The most common explosive type used in surface mines is emulsion explosives. This paper presents the study on the detonation velocity of bulk emulsion ...

iRing - Creators of Aegis, an underground drill & blast ...

Since 2003, the experts at iRing have been solely dedicated to the pursuit of optimizing underground drilling and blasting operations. What we have discovered is that when we turn the blast into a repeatable industrial process then the overall costs and environmental impact are reduced substantially, at the same time allowing for increased rates of production.

ANFO - Wikipedia

ANFO (or AN/FO, for ammonium nitrate/fuel oil) is a widely used bulk industrial explosive.Its name is commonly pronounced as "an-fo". It consists of 94% porous prilled ammonium nitrate (NH 4 NO 3) (AN), which acts as the oxidizing agent and absorbent for the fuel, and 6% number 2 fuel oil (FO).. ANFO has found wide use in coal mining, quarrying, metal mining, and civil construction in ...

(PDF) A Study on Influence of Density and Viscosity of ...

A Study on Influence of Density and Viscosity of Emulsion Explosive on Its Detonation Velocity Article (PDF Available) in Modelling, Measurement and Control C 78(3):316-336 · September 2017 with ...

Explosives and Detonators - Mining and Blasting

3.2 Velocity of Detonation (VOD) The velocity of detonation (VOD) is the rate at which the detonation wave travels along an explosive column. The greater the VOD the greater the power or 'shattering' effect of an explosive. High VOD explosives are more suitable in hard rock and low VOD in …

detonation velosity in blastting mine - BINQ Mining

Dec 01, 2012· Mining, Quarrying & Prospecting: How to spoof ANFO into having …. Dec 17, 2010 · It is a well known fact that in blasting the best rock breakage occurs when the detonation velocity (DV) of the explosive matches the speed of sound … »More detailed

Detonation Wave Propagation in Underground Mine Entries

Lynn Experimental Mines to evaluate low level (<6 psig) detonation wave propagation behavior in single and multiple entry configurations. Entry cross-sectional area varied from 5 to140 m. 2 and explosive weights of Pentolite ranged from 0.24 to 2.4 kg. Behavior of the detonation …

NATIONAL INSTITUTE OF ROCK MECHANICS

DETONATION VELOCITY MEASUREMENT NATIONAL INSTITUTE OF ROCK MECHANICS (An Autonomous Research Institute under Ministry of Mines, Govt. of India) Champion Reef Post - 563 117 Kolar Gold Fields, Karnataka, India Phones: (+91-8153) 275006 to 275009 and 275000 (Director)

(PDF) Velocity of detonation and fragmentation analysis to ...

The confined velocity is the rate at which the detonation wave propagates through an explosive within a blast hole or any restrained space. The unconfined velocity emanates when an explosive is ...

In-hole velocity of detonation (VOD) measurements as a ...

During 2001–2010, most of the VOD measurements were carried out for bulk explosives ANFO, heavy ANFO and emulsion. All the blasts were initiated with NONEL detonators and cartridge explosives ().Hole lengths were from 7.0 to 22.0 m, the drill hole diameter 82 and 85 mm, and the charge weight per delay was from 8 to 140 kg .. Download : Download full-size image

Effect of water on ANFO/emulsion blends in surface mine ...

@article{osti_433584, title = {Effect of water on ANFO/emulsion blends in surface mine blasting}, author = {Schettler, L and Brashear, S}, abstractNote = {The effect of water on several ANFO/emulsion blend ratios is documented by both physical observations and analytical testing to demonstrate the effect even small quantities of water can have on water resistant blends.

explosives – Mining and Blasting

Jun 14, 2018· ANFO has found wide use in coal mining, quarrying, metal mining, and civil construction in undemanding applications where the advantages of ANFO's low cost and ease of use matter more than the benefits offered by conventional industrial explosives, such as water resistance, high detonation velocity, and performance in small diameters.

Explosives and Blasting-Part 1 | Online Mining Blog

It is the velocity with which the detonation waves move through a column of explosives. Factors that affect the detonation velocity are Explosive type, Diameter, Confinement, Temperature & Priming. In general, higher the velocity of detonation better will be the shattering effect. The explosive's detonation velocity ranges from 1500–6700 m/sec.

Velocity of detonation measurement and fragmentation ...

In holes, the measurement of the velocity of detonation (VOD) helps in comparing and evaluating relative performance of explosives. In this paper a blast performance assessment was conducted based on the results obtained from the steady state VOD measurement of emulsion explosives HEF100 and degree of blast fragmentation conducted on an open pit blast.

Toxic Fumes From Explosives: Ammonium Nitrate-FuelOil …

Toxic Fumes From Explosives: Ammonium Nitrate-FuelOil Mixtures By R. F. Chaiken, E. B. Cook, and T. C. Ruhe Pittsburgh Mining and Safety Research Center, Pittsburgh, Pa. UNITED STATES DEPARTMENT OF THE INTERIOR Rogers C. B. Morton, Secretary BUREAU OF MINES Thomas V. …

Chapter 8 BLAST DESIGN

situations may also require the adoption of a higher velocity, more energetic explosive. Where drilling and blasting conditions are both severe, the operator should use premium explosives, at least in the bottom one third of the drill hole. Clearing the toe, and therefore contributing to a smoother floor, is a major asset to improve BLAST DESIGN

ShotTrack - Construction & Mine Blasting

ShotTrack is a company from Australia that is dedicated to the design, development and manufacture of state of the art vibration analysis and electronic blast monitoring equipment for the mining and construction industries.

Blasting Injuries in Surface Mining with Emphasis on ...

Blasting injuries in surface mining with emphasis on flyrock and blast area security Abstract Problem: Blasting is a hazardous component of surface mining. Serious injuries and fatalities result from improper judgement or practice during rock blasting.

13.3 Explosives Detonation

The detonation wave from the blasting cap would cause detonation of the dynamite. To make a large hole in the earth, an inexpensive explosive such as ANFO might be used. In this case, the detonation wave from the blasting cap is not powerful enough to cause detonation, so a booster must be used in a 3- or 4-step train.