The Pit Viper Series 351 blasthole drill offers new applications and technological solutions. It can be used for single pass drilling of angled or vertical holes down to a depth of 65 ft ( m), and for drilling of blastholes up to 16 in. (406 mm) in diameter. Consistent with the entire PV351 drill design, the twostage spur gear rotary head

Fully Automated Blasthole Drilling Becomes a Reality. Drill control system that was originally developed to improve fragmentation also allows the operators to avoid dangerous highwalls. By Steve Fiscor, EditorinChief. Automation has become the catch phrase for mining technology improvements.

Drill rigs The mobilization of rotary and downhole drills was linked to significant postwar changes in rotary drilling technology. but a large self BLASTHOLE DRILLING IN OPEN PIT MINING * 1 inch = 25. ** 1 bar = 14. was supplied in two standard sizes – the DHD 275 for 4¾* inch and 5 inch holes and the DHD 1060 for 6 and 6½ inch .

Blasthole drilling rigs are the unsung heroes of openpit mining. Rarely do they see the spotlight as much as their counterparts on the loading and hauling side of the opera tion. Surface mines, however, rely on these machines and their operators to drill con sistent blast patterns quickly. An improperly drilled blast pattern can

Oct 12, 2012· Rock breakage by Detonation and Interaction of explosive energy with rock – There are three sources of generation of fragments in mines: (a) Fragments formed by new fractures created by detonating explosive charge, (b) Insitu blocks that have simply been liberated from the rock mass without further breakage and (c) Fragments formed by extending the insitu fractures in combination .

Jan 01, 2015· Read "Drilling rate prediction of an open pit mine using the rock mass drillability index, International Journal of Rock Mechanics and Mining Sciences" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Mining services company reports that the last Pit Viper 351 blasthole drilling rig for diversified miner Anglo American subsidiary Kumba Iron Ore's (Kumba's) drill rig order will ...

Mar 13, 2012· (1) Drill AdaptabilityThe type of rock drill used in mining drilling is generally determined by the hole diameter required and the mechanical properties, principally hardness, of the top hammer is commonly employed for drilling of holes less than 125 mm in diameter in all but the hardest rock, although a rotary cutting method may instead be used for soft hole diameters greater .

Rotary blasthole drilling rigs are surface mining equipment used to drill the rock to a certain depth and create blast holes to load the explosives. This process helps in creating quarries and openpit mines where mining activity can be initiated further.

Master Drilling offers a comprehensive portfolio of niched drilling services, adapting to, and meeting each and every client requirement: We offer cuttingedge solutions across the mining, energy and civil engineering sectors; focusing on speed, efficiency, innovation, scale, accuracy and flexibility.

Jan 26, 2010· Fully Automated Blasthole Drilling Becomes a Reality. Jan 26, 2010. ... While mining engineers around the world work toward full automation in openpit mining, they discover the sitespecific variables that require the machines to think and solve problems. ... "In reality we are measuring the energy required to drill that foot of rock. The ...

drilling used in open pit iron mining. drilling used in open pit Iron mining Pumpkin Hollow Project Mining Technology. A drill rig used at the Pumpkin Hollow Project The Pumpkin Hollow Project is a high grade iron, The second phase will comprise of a 70,000tpd open pit mining .

Appendix E6 Open Pit – Drilling and Blasting . 1 | P a g e Memo ... Subdrill 2 m Rock/Ore tonnes per hole 3,002 Tonnes Penetration rate (instantaneous rate) 44 m/hr ... Blasting operations will be performed by mine personnel on a 7 day per week, day shift continuous basis. A contractor will be employed to supply the operations with ...

Openpit mining causes changes to vegetation, soil, and bedrock, which ultimately contributes to changes in surface hydrology, groundwater levels, and flow paths. Additionally, openpit produces harmful pollutants depending on the type of mineral being mined, and the type of mining .

Open pit mining, where material is excavated from an open pit, is one of the most common forms of mining for strategic minerals. This type of mining is particularly damaging to the environment because strategic minerals are often only available in small concentrations, which increases the amount of ore needed to be mined.

Nov 28, 2017· Deep impact: takes automated drilling to the next level. BHP has been trialling the technology on Pit Viper 271 rigs at the Yandi mine for the past two years. Credit: Courtesy of According to Tyler Berens, we are only beginning to see what autonomous drilling can do .