mine drilling blasting and detonation

The objective of a blasting engineer in a mine is to generate a suitable muck pile having suitable size distribution of the rock that can be efficiently loaded, transported and milled (Singh et al., 2005). The goal of efficient blasting can be achieved by investigating the relationship between blast design parameters and fragmentation.

Best Practices Product Training, Blast Designs, Blast Optimization, Borehole Callipering, Borehole Tracking, Construction Civil Blast Designs, Electronic Blasting, Face Profiling, Fragmentation Analysis, High Speed Filming, Independant Blast Auditing, Mine to Mill Optimization, Structure Surveys, Tmin Studies, Velocity of Detonation Measurements, Vibration Airblast Monitoring

Detonating cord (also called detonation cord, detacord, det. cord, detcord, primer cord or sun cord) is a thin, flexible plastic tube usually filled with pentaerythritol tetranitrate (PETN, pentrite). With the PETN exploding at a rate of approximately 6400 m/s, any common length of detonation cord appears to explode instantaneously.

BLAST VIBRATION MONITORING IN OPENCAST MINES A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE ... of blasting, drilling pattern, quality and quantity of explosives being used, delay pattern etc. Also ... To study the blast vibration which is generated by the surface mine blasting .

An Examination of Mine Blasting Accidents Over a Quarter of a Century By: Verakis ABSTRACT This paper summarizes blasting accident data for over a quarter of a century () for all types of surface and underground mining operations in the United States. Although many billions of pounds of explosives and blasting agent have been used by

The scope of strain failure, fracture pattern, and crack characteristic zones in the rock mass was determined. The results demonstrate that the hole spacing, at m, is reasonable. Furthermore, blasting parameters were determined for 8939 working face at Xinzhouyao Mine and then deephole blasting was implemented to presplit the hard roof.

PAGE 4 CHAMBER OF MINES | DRILLING AND BLASTING IN HARD ROCK NARROW TABULAR MINES INTERACTIONS AND LESSONS FROM MINES VISITS TO MINE TRAINING CENTRES Visits were conducted to two large mining companies (one gold and one platinum) to assess the quality and comprehensiveness of training in marking, drilling, charging and blasting. In both cases,

Jul 28, 2017· Rock blasting for mining ... This can be achieved by drilling and blasting. 8. 8 Hence, drilling and blasting are considered to be the first phase of the production cycle in most of the mining operations. Today, technology has shown much advancement in several activities of mining. ... The mine blasting expenditure should also be very less.

Jul 14, 2016· UG Explosives and Blasting 1. K D PRASAD GM(Min)/(Vig) 2. Definition of Explosives : Explosives is a chemical compound or mixture, when exploded by action of heat, impact, gives large volume of gases in a very short time at high temperature pressure. Classification : All commercial Explosives are broadly divided in two categories. Low Explosives High Explosives

Mining Technology Mining News and Views Updated . M. Mammoth Drill Tools, Blasthole Drilling Tools for the Mining Industry MAXAM, Explosives and Blasting Solutions for Mining, Quarrying and Construction Applications Mincon, StateoftheArt Rock Drills Including DTH Hammers and Bits Mine Master Ltd, Drilling and Bolting Equipment for Underground Mining MINTECH, HighQuality Blasting Equipment ...

Dykon Blasting – a drilling and blasting company providing the controlled use of explosives for the construction, mining, aggregate demolition industry. Dykon Blasting – a drilling and blasting company providing the controlled use of explosives for the construction, mining, aggregate demolition industry.

Blast Audits – All aspects of the drilling and blasting will be assessed including drilling performance, hole diameter, blast pattern, explosives specifications, initiation sequence, fragmentation and displacement This activity requires making a site visit to understand the mine design, mining method and to benchmark the existing production ...

For the reasons discussed in our opinion in this case, Maine Drilling and Blasting, Inc. v. Insurance Company of North America, No. 932230, the resolution of a determinative issue depends upon a question of Maine law on which there is no clear controlling precedent in the decisions of the Supreme Judicial Court of Maine.

Blast Audits – All aspects of the drilling and blasting will be assessed including drilling performance, hole diameter, blast pattern, explosives specifications, initiation sequence, fragmentation and displacement This activity requires making a site visit to understand the mine design, mining method and to benchmark the existing production ...

Sep 26, 2018· The line drilling is established at the mine for dragline bench blast. The mining through blasting is now being operated more safely as the line drill resulted in to more stable highwall and implementation of electronic delay detonators in dragline benches providing desirable outcomes. Principle of line drilling

Blast Optimization Programs have been developed for both largescale mining and smallerscale drift and tunnel blasting applications. The purpose is to reduce drilling and explosives consumption, improve muckpile geometry and fragmentation, and control ground vibrations.

rock fragmentation course: mngn 407 semester spring 2005 credits: hours mining engineering department colorado school of mines golden, colorado instructor: dr. vilem petr vpetr

MINE SAFETY AND HEALTH ADMINISTRATION Northeast District Surface Nonmetal Mine ... Dyno New England, Inc. was contracted to do the blasting at The York Hill Mine and Mill. The principal operating official was H. Dean Mitchell, president. ... The holes were laid out and drilled by the drilling contractor, Dearco Drilling, Inc. ...

The product also extends quarry life length as blasting is possible close to structures like offices, roads and housing. Further, Royex may be used as a smooth blasting product in the back holes to ensure stable quarry back wall integrity. Royex is also an excellent solution for correction blasting in the quarry such as managing toes or overhangs.

With BME's full service blasting offering, it measures the holes after drilling is completed by the mine or contractor, then primes, loads, stems and ties the blast – sometimes also conducting the blast itself unless the mine opts to employ their own blaster.

Additional emissions of NOx, CO, and/or SOx are released from the detonation of the explosives used in the blasting. As specified in Section of AP42 (2/80), four primary types of explosives are used at most quarry ... Trace metal concentrations in aggregate dust released from drilling and blasting operations can vary between sites.

Controlled blasting in a limestone mine using electronic detonators: A case study ... Plugging in to digital detonation: electronic sequencing and initiation systems can improve blasting performance and reduce neighbour complaints. ... Gupta, R. N., 2012. Rapid excavation of tunnels using innovative drilling and blasting techniques. Spathis ...

As we can see from the November 2008 article, "Construction Blasting Fundamentals," there are many forms of risk associated with blasting is clear that, despite these risks, experience reveals that blasting can be performed without incident, when adequate riskcontrol measures are used to .

Subsequently, specific charge and specific drilling are calculated which vary between to 1 kg/m3 and to m/m3, respectively. 3. Blasting Index A blasting index (BI) developed by Lilly in (1986), correlates powder factors for blasting in mines. The blasting index is based on strength, structure, density and hardness of the rock.