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2008-5-22 · Blasthole Drilling This module presents aspects of surface drilling that are important to blasting operations. The purpose of drilling into rock is to provide a “blasthole” into which explosives can be loaded. Good drilling practices include carefully monitoring drill-rig operating parameters, taking careful notes of the changes in geology during
Get Price2013-8-23 · The Chip & Dust Collector, C&DC, is a mechanical and hydraulic subsystem that collects the material exiting the blast-hole and conducts it through the analytical portion of the analyzer and into a cyclone which deposits the cuttings on the ground. The hydraulic component of the C&DC raises and lowers the Extraction Hood for tramming and drilling.
Get Price2020-2-3 · limits the impact of starting the drill on weak power grids by reducing the initial inrush current. This can reduce overall power infrastructure cost and increase the life of the main motor and compressor. Ready, set, go With a reliable, adaptable and powerful drill, your mining operations can move forward. Count on our blasthole drills
Get Price2010-1-4 · Blasthole drilling in open pit mining.
Get Price2016-2-18 · Rotary drilling with rolling tricone bits is the most widely used method for drilling large-diameter blast-holes in large surface mining operations. This drilling method is applicable to a wide range of soft to hard rock materials. This paper presents a fuzzy model for predicting the penetration rate of tricone rotary blast-hole drilling.
Get Price2017-4-27 · Pulldown and pullback cables are attached to the mounting plates, which are attached to the rotary head case. On the low pressure version, 110 psi (7.6 bar) can be used for rotary drilling of blastholes up to 7 7⁄8' (200 mm) in diameter.
Get Price2018-11-1 · One such method that has been demonstrated to provide meaningful and repeatable results related to rock mass characterization has been through the use of measurement while drilling (MWD) systems applied to core or blasthole drills [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15].
Get Price2019-8-28 · In this method of drilling, the drifter, or drill engine, moves along a guide or track on the drill carrier. It contains both the piston and the rotation components. Piston actuation can be achieved by either compressed air or hydraulic action (the merits of each will be briefly discussed later).
Get Price2018-12-1 · A three-boom jumbo XE3C, manufactured by Atlas Copco, equipped with percussive-rotary top hammer drill, using semi-automatic ABC (Advanced Boom Control) was used to drill the analyzed blasts. Data comprises production face drilling holes of short length (4–5.5 m), using single rod (5.5 m length and 38 mm diameter) and 46 mm bit.
Get Price2008-5-22 · Blasthole Drilling This module presents aspects of surface drilling that are important to blasting operations. The purpose of drilling into rock is to provide a “blasthole” into which explosives can be loaded. Good drilling practices include carefully monitoring drill-rig operating parameters, taking careful notes of the changes in geology ...
Get PriceTAIYE rotary blasthole drilling rig is a drilling rig specially designed for large-scale quarries and open-pit mines for high-level blasting. It has extremely high production efficiency. You can choose the appropriate model of blast hole drilling machine according to different situations, using cone roller drilling or DTH drilling operation.
Get Price2017-4-27 · to 5.5' (140 mm) drill pipe. The 30 ft (9.1 m) multipass tower provides a depth of 86 ft (26.2 m), using the 2-rod carousel combined with a starter rod under the rotary head. A total depth capacity of 146 ft (44.5 m) is possible when using the 4-rod carousel. A variable displacement axial motor powers the rotation of the head.
Get Price2021-7-28 · At MINExpo, Komatsu will launch a new blasthole drill based on the 77XR, but upgraded, bigger, and capable of up to 13.75-in. holes. Caterpillar took a systems approach to the upgrades to the MD6310, above. Each component and subsystem was selected and matched to …
Get Price2021-1-19 · Drilling Method Rotary and DTH - Multi pass Hole Diameter 6 in - 10 5/8 in 152 mm - 270 mm Hydraulic Pulldown 60,000 lbf 267 kN Weight on bit 65,000 lb 29,500 kg Hydraulic Pullback 27,000 lbf 120 kN Single pass depth 35 ft, 40 ft 10.7 m, 12.2 m ... Pit Viper 235 blasthole drill
Get Price2 天前 · Mining Methods Boxhole Boring. Boxhole boring is similar to the raisebore method, but the drilling machine is located below the mineralization, so development is not required above the mineralization.From a drill chamber in waste rock below the ore, we drill a series of overlapping holes up through the ore zone and collect the falling ore from a chute in the extraction chamber.
Get Price2019-8-5 · increase the life of the bit, drill sting and feed system. Built for performance Designed for comfort The Atlas Copco PV-235 is a crawler mounted, hydraulic tophead drive, multi-pass rotary drilling rig that can be configured in many different ways to compliment a wide variety of rotary and DTH drilling operations. It provides blasthole drilling to
Get PriceThe C615 Jack-less blasthole drill is designed to drills holes of 4 inch (101.6mm) to 6 inch (152.4mm) up to a maximum depth of 52.5 ft (16m). Built to drill in limestone quarries, aggregate mines and various construction application. View More
Get Price2008-5-22 · Blasthole Drilling This module presents aspects of surface drilling that are important to blasting operations. The purpose of drilling into rock is to provide a “blasthole” into which explosives can be loaded. Good drilling practices include carefully monitoring drill-rig operating parameters, taking careful notes of the changes in geology ...
Get Price13 Concepts for Rotary Blasthole Drill Design 13.1 Introduction 13.2 Primary Requirements of the Drill 13.3 Size and Weight of the Drill 13.4 Rotary Speed and Torque 13.5 Feed Force and Speed 13.6 Pullout Force and Speed 13.7 Breakout Torque 13.8 Hydraulic Leveling Jacks 13.9 Ground Load Bearing 13.10 Compressor Discharge and Pressure 13.11 ...
Get Price1995-4-14 · A method of removing a shim from an automatic breakout wrench of a blasthole drill, said blasthole drill comprising a frame supported for movement over the ground, a mast supported by said frame, said mast defining a drill hole axis, and an automatic breakout wrench for turning one drill pipe section relative to another drill pipe section to ...
Get Price2010-1-4 · Drilling equipment manufacturer Atlas Copco has produced a new 204 page free guide to blasthole drilling incorporating eleven technical articles and nine case studies
Get Price2021-7-28 · At MINExpo, Komatsu will launch a new blasthole drill based on the 77XR, but upgraded, bigger, and capable of up to 13.75-in. holes. Caterpillar took a systems approach to the upgrades to the MD6310, above. Each component and subsystem was selected and matched to …
Get Price2021-7-7 · The Atlas Copco DM-M3 has an on-board depth capability of 200 ft (61 m) using 10 ¾ in diameter drill pipe and up to 240 ft (73 m) using 8 5 8 in diameter drill pipe with a 5-rod carousel. The standard drill pipe length is 40 ft (12.2 m) and the hole diameter ranges from 9 7 8 in - 12 ¼ in (251 – 311 mm). Weight on bit is rated at 90,000 ...
Get Price2021-5-31 · The blasthole drill carries out single-pass drilling and multi pass, as well as angle drilling, according to Cat. MACA is currently running an MD6250 at the Bluff coal mine, in Queensland, while AngloGold Ashanti Australia, with support from Flanders and Tropicana Mining Alliance partner, Macmahon Holdings, now has five autonomous Cat MD6250 ...
Get Price2 天前 · Mining Methods Boxhole Boring. Boxhole boring is similar to the raisebore method, but the drilling machine is located below the mineralization, so development is not required above the mineralization.From a drill chamber in waste rock below the ore, we drill a series of overlapping holes up through the ore zone and collect the falling ore from a chute in the extraction chamber.
Get Price2021-5-10 · Atlas Copco Blasthole Drills DML series. Tower and pipe handling ... and a no-bump drill pipe change limits the ... Drilling Method Rotary and DTH - Multi pass Hole Diameter 5 7/8 in - 10 5/8 in 149 mm - 270 mm Hydraulic Pulldown 60,000 lbf 267 kN Weight on bit 60,000 Ib 27,200 kg
Get Price2021-7-28 · At MINExpo, Komatsu will launch a new blasthole drill based on the 77XR, but upgraded, bigger, and capable of up to 13.75-in. holes. Caterpillar took a systems approach to the upgrades to the MD6310, above. Each component and subsystem was selected and matched to …
Get Price2021-7-7 · The Atlas Copco DM-M3 has an on-board depth capability of 200 ft (61 m) using 10 ¾ in diameter drill pipe and up to 240 ft (73 m) using 8 5 8 in diameter drill pipe with a 5-rod carousel. The standard drill pipe length is 40 ft (12.2 m) and the hole diameter ranges from 9 7 8 in - 12 ¼ in (251 – 311 mm). Weight on bit is rated at 90,000 ...
Get Price2021-1-19 · Drilling Method Rotary and DTH - Multi pass Hole Diameter 6 in - 10 5/8 in 152 mm - 270 mm Hydraulic Pulldown 60,000 lbf 267 kN Weight on bit 65,000 lb 29,500 kg Hydraulic Pullback 27,000 lbf 120 kN Single pass depth 35 ft, 40 ft 10.7 m, 12.2 m ... Pit Viper 235 blasthole drill
Get Price2017-6-13 · Predicting Drill Wear using the Discrete Element Method. ... where Tricone bits are preferred in most rotary applications for blasthole drilling. During the comminution process the bit is subjected to changes, known as bit wear, due to the contact between bit teeth ground formations. The bit wear will affect the drill performance significantly ...
Get PriceThe C615 Jack-less blasthole drill is designed to drills holes of 4 inch (101.6mm) to 6 inch (152.4mm) up to a maximum depth of 52.5 ft (16m). Built to drill in limestone quarries, aggregate mines and various construction application. View More
Get PriceWhether selection of chip removal air volume is reasonable or not, do affect the performance of blasthole drill and bit’s life. How to calculate air volume always make the designers confused. In this paper, writer use theory of gas-solid two-phase flow and energy principle combined with characteristic of rock ballasts from the mine site to determine particle rising speed, free floating speed ...
Get Price2021-7-17 · By using this site, you agree to the use of cookies. We do not store any personal details. ... Rotary blasthole drill rigs. Epiroc offers the most comprehensive line of rotary blast hole drilling rigs in the industry. With a multitude of configurations to choose from you …
Get Price2019-8-5 · increase the life of the bit, drill sting and feed system. Built for performance Designed for comfort The Atlas Copco PV-235 is a crawler mounted, hydraulic tophead drive, multi-pass rotary drilling rig that can be configured in many different ways to compliment a wide variety of rotary and DTH drilling operations. It provides blasthole drilling to
Get PriceJun 04 2019nbsp018332mineralore mined using the hardrock blasthole drill heavy duty rotary and downthehole rigs for blasthole drilling open pit blast pattern rules of thumb burden 25 to 35 hole diameters spacing hole size greater than 140 mm 5189 12 to 15 burden hole size smaller than 140 mm 5189 15 to 18 burden stemming 07 to 13 burden.
Get Price2019-3-4 · The DM30 is designed to handle a 4' (102 mm) drill pipe, but can handle up to a 5' (127 mm) drill pipe. The 30 ft (9.1 m) multi pass tower provides a depth of 90 ft (27m), using the standard 2-rod carousel combined with a starter rod under the rotary head. A total depth capacity of 150 ft (45 m) can be reached when using the optional 4-rod ...
Get Price2020-10-14 · RPM. Get out of the harmonic vibration range for the drill pipe. WOB. By keeping the bit on the bottom, it is not free to slip or bounce. a shock absorber. This is better for the drill and driller. heavier pipe - 2 or greater wall thickness - in the bottom section of the drill string to provide dampening. Use Use Vibration Cures Change. bit design.
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