Drillers & Blasters - Dexter Construction | Municipal ...

Dexter Construction is a large, diversified Construction Company engaged in all major aspects of the heavy civil construction industry within the Atlantic Provinces. We are currently seeking the qualifications and expertise of Drillers & Blasters based out of Bedford, NS. Primary Duties and Responsibilities: Drive and operate tracked or truck-mounted rotary drilling, air-track

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Drilling and Blasting | Technical Aspects of Mining ...

Drilling with drifters and electrohydraulic rigs is called longhole drilling. In small-scale surface mining including small quarries, jackhammers are in common use but in larger quarries and open pits, various types of mechanised rigs are employed. They drill holes of …

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Optimisation grade control procedures at the open pit ...

A large Copper open pit mine in Chile has lost US$134 million over a 10-year period because of suboptimal grade control procedures based on the blast holes sampling. It was estimated by the difference between actually used blast hole sampling protocol and its optimized version. (P. Carrasco: WCSB1, Denmark 2003)

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Blasting Drilling of Open Pit Mining - Hardrockdrills.com

Oct 23, 2018· Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery – Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to now Classifications By operation size By material By level of mechanization Operation Size Huge operations 50 Mio t and more Big operations …

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The influence of drilling process automation on ...

The influence of drilling process automation on improvement of blasting works quality in open pit mining Maciej Bodlak1,Dominik Dmytryk2, Piotr Mertuszka3,*, Marcin Szumny3, and Grzegorz Tomkiewicz2 1Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology, 27 Wyb. Wyspianskiego St., 50-370 Wroclaw, Poland

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Open Pit Mining 2012 - MineralsEd

Open pit mining is used to extract ore in rock bodies that are at or close to the surface of the Earth. Large‐scale equipment ‐drills, shovels, and trucks ‐are used to make operations efficient and economical. When they move in, the ore is dug up and sent to a mill for

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Kui Tong Tai - Kusial, Kelantan, Malaysia | Profil ...

• Supervised blasthole sampling in open pit mine and provided estimation of tonnage and grade of ore reserve based on block model of sampling area. ... cross- sectional diagrams and monthly reports concerning ore and mineral extractions from field work and laboratory results. ... • Assisted in drill hole collar surveys, mine pit surveys and ...

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Open Pit Metals Solutions - Deswik

• Deswik.OPDB to develop comprehensive open pit production drill designs. ... • Support Schmidtt, Wulff, Rose and observation diagrams. Automated road design tool • Determine cut and fill requirements from road centrelines, with solids creation and surface ... • Audit drill patterns against blast hole distribution and location constraints.

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PROCEDURES FOR BLASTING

Monitoring of drilling operations will also provide feedback to the drillers so that they may make adjustments to their methods. Flyrock can also be controlled by using blasting mats or soil cover to retain the exploded rock. It's important that the Blaster make sure that all personnel are outside the blasting area where fly rock can be ...

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Designing Blast Patterns Using Empirical Formulas

technique by comparing drill and blast pattern dimensions used in the quarry with those determined by the presented method. The author visited 12 lime­ stone and dolomite,quarries in Ohio (Adams, Crawford, and Highland Counties), Wisconsin (Milwaukee, Racine, and …

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Reserve Pit Management: Risks to Migratory Birds

screening of pits or open tanks to prevent the mortality of migratory birds and other ... Rotary drilling rig diagram with reserve pit (mud pit). 3 Following well completion, reserve pits are left in place after the drilling rig and other equipment are removed from the site (Figure 3). Reserve pit …

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Drill-Holes and Blast-Holes - Mines ParisTech

The initial data (Figure 1) are from an open-pit copper mine in Northern Chile where a subdomain was chosen for analysis because it is almost homogeneously covered by around 3,000 drill-hole samples (3m long) and 13,000 blast-hole sam-ples (15m long). In this case study, the diameters of the drill-holes and blast-holes are considered to be the ...

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Putting rotary drilling into perspective

Mar 10, 2010· Putting rotary drilling into perspective. 's largest drill, the Pit Viper 351E, operates on a blast pattern at an open pit copper mine. Rotary blasthole drills are the predominant method of drilling 9 inch (229 mm) diameter holes or greater. A complete range. With the acquisition of 's Drilling Solutions, Baker ...

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blasthole sampling Archives - International Mining

May 07, 2020· acQuire optimises blasthole sampling with new app. Global software company acQuire has introduced mobile blasthole sampling in its latest release of GIM Suite 4.2. The update extends acQuire's mobile app to include mobile data capture for blasthole sampling in open-pit mines, it said. acQuire explained: "The app, called acQuire Arena, gives ...

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Blasthole Drilling - Soil and Groundwater Information

TAIYE628-DTH hydraulic drilling rig is specially developed to meet the customer's requirements for favorable price. It is widely used in the open-pit blasthole drilling and underwater blasthole drilling projects for metallurgy, mining, building materials, railroad construction, hydropower projects, national defense, earthmoving work, etc.

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Fully Automated Blasthole Drilling Becomes a Reality | E & MJ

Oftentimes those variables become overwhelming when the entire operation is considered. For some repetitive processes that require consistent performance, such as blasthole drilling, the industry is seeing technology improve by leaps and bounds. The Ardvarc (Advanced Rotary Drill Vector Automated Radio Control) system is one such system.

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Rock Engineering Practice & Design

involves drilling blastholes by percussion or rotary-percussive means, loading the boreholes with explosives and then detonating the explosive in each hole in sequence according to the blast design. The explosion generates a stress wave and significant gas pressure. Following the local fracturing at the blasthole wall and the

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Water Borehole Drilling Process In Only 4 Steps | RPM Drilling

Sep 13, 2019· 7 – The well/borehole will be disinfected. Chlorination is the most common method of disinfection undertaken. 8 – Post chlorination the well/borehole will need to be dewatered. The water will be tested until chlorine levels are back below 0.5mg per litre. 9 – The well/borehole will be resealed.

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Blasthole drilling in open pit mining – MINING.COM

Jan 04, 2010· Drilling equipment manufacturer has produced a new 204 page free guide to blasthole drilling incorporating eleven technical articles and nine ... Blasthole drilling in open pit …

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A New Perimeter Control Blast Design Concept for ...

perimeter damage extent diagram. ..... 7 Figure 6. Practical damage circles only applied to buffer holes in the Holmberg [1982] perimeter ... Engineering drawing of block 2 blasthole and strain gage sensor locations.....17 Figure 11. ... Example showing drill hole locations …

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Blast Hole Drilling: The Basic Process | RPM Drilling

Aug 24, 2017· Blast hole Drilling is a technique used in mining whereby a hole is drilled into the surface of the rock, packed with explosive material, and detonated. The aim of this technique is to induce cracks in the inner geology of the surrounding rock, in order to facilitate further drilling …

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BULK EMULSION EXPLOSIVE - A CASE STUDY - MADEN

At the Aitik open pit mine north of the Arctic Circle, Boliden Mineral AB is mining about 12 million tonnes of low grade copper ore per year. The average copper content is only 0.38 per cent. In 1966 development work began and in 1968 production could start. New large scale techniques and equipment

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Construction Driller Job Description | LocalJobNetwork.com

Blast holes in open-pit mines and quarries. Operate tracked or truck-mounted rotary drilling, air-track or other drilling machines. Measure location and stake out pattern of holes to be drilled, load blast holes with explosives and detonate explosives to dislodge coal, ore or rock. Read instructions and diagrams.

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A better way to presplit - Mining & Construction online

Aug 03, 2011· When it comes to blasthole drilling, large hole drill rigs such as our Pit Viper series drills couple-d with our FlexiROC D60/65 and SmartROC D65 crawler rigs, is without doubt the smartest partnership. The Pit Viper is used for drilling the production blastholes and the FlexiROC D60/65 and SmartROC D65 are used for drilling the presplit holes.

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Optimisation of the drill and blast work in the open pit ...

Rabenwald mine and the State of the Art in drilling and blasting. Therefore all aspects of drilling and blasting were examined, from the planning process at the beginning, a wall surveying program, the drilling process, the charging of the holes up to the documentation and measurement of ground vibrations and blasting results.

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PPT – Best-Practice Blast Hole Sampling PowerPoint ...

Feb 11, 2020· Pitard, F. 2008, Blasthole Sampling for Grade Control The Many Problems and Solutions. Sampling 2008, AusImm-CSIRO, Perth. May 2008. On the reverse ; François-Bongarçon, D. 2010, Are Blast Hole Samples That Bad And RC Samples That Good For Open Pit Grade Control - Story Of a Trade-Off. Sampling 2010, AusImm-CSIRO, Perth. May 2010.

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Open Pit Metals Integrated planning tools for open pit ...

directly to the drill rig. » Distribute drill designs and GPS guidance files to surveyors in either DXF or CSV formats. Deswik.OPDB Design of optimum dig lines for open pit grade control » Deswik.DO removes the manual and subjective grade control processes employed by the majority of open pit operations, and replaces them with an automated,

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US3181630A - Blasthole drill - Google Patents

US3181630A US207269A US20726962A US3181630A US 3181630 A US3181630 A US 3181630A US 207269 A US207269 A US 207269A US 20726962 A US20726962 A US 20726962A US 3181630 A US3181630 A US 3181630A Authority US United States Prior art keywords rod drill cylinder rack Prior art date 1962-07-03 Legal status (The legal status is an assumption and is not a legal conclusion.

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