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Prediction of drilling rate index from rock strength and …

The penetration rate of jumbo and electro-hydraulic drills was measured in the field by employing bits in different diameters and the specific energy of the drilling was calculated at various ...

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Rate of Penetration ROP in Drilling: A Guide

Rocks that contain gummy clays can cause the bit to ball up and drill inefficiently. The permeability of rock also affects the penetration rate. In permeable rocks, the drilling fluid filtrate can move into the rock ahead of the bit, equalize the pressure differential acting on the chips formed beneath each tooth, and increase the penetration ...

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Estimating the drilling rate of jumbo drills from Sievers' J …

Estimating the drilling rate of jumbo drills from Sievers' J-miniature drill tests in sandstones and limestones from a mining exploitation in Asturias (Spain) ... Book New Challenges in Rock Mechanics and Rock Engineering. Click here to navigate to parent product. Edition 1st Edition. First Published 2024. Imprint CRC Press. Pages 5. eBook ISBN ...

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Predicting Rate of Penetration (ROP) using Fuzzy Logic …

A new approach for improved prediction of the drilling rate of penetration (ROP) using fuzzy logic is proposed. ROP is important because when it is calculated with accurate and optimized

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Prediction of jumbo drill penetration rate in underground …

Estimating penetration rates of Jumbo drills is crucial for optimizing underground mining drilling processes, aiming to reduce costs and time. This study investigates various regression and machine learning methods, including Multilayer Perceptron (MLP), Support Vector Regression (SVR), and Random Forests (RF), to predict the penetration rates (ROP) using …

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An Investigation of Different Drill Bits and …

Concluding remark is that, if the intact rock properties are approximately same, drilling performance of jumbo drill depends largely on the discontinuities on the rock mass.

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Shaft sinking from 1970 to 2007: Mechanical excavation

The suspended drill jumbo drills a burn cut rather than a V-cut or cone cut that is normal in shaft sinking. Initially, the cut consisted of a series of closely spaced holes. Dynatec Mining of Richmond Hill, Ontario, pioneered the use of one or more large diameter holes (200 to 250 millimetres) for the cut instead of a series of small holes.

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A new empirical model for prediction of jumbo drills' …

This paper developed an empirical model that incorporated the Rock Mass Drillability Index (RDi) to predict the rate of penetration (ROP) of jumbo drills in underground mines. Performance …

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Solved A percussion drill jumbo is operating in a tunnel in

Answer to A percussion drill jumbo is operating in a tunnel in. Science; Earth Sciences; Earth Sciences questions and answers; A percussion drill jumbo is operating in a tunnel in a hard rock mine under the following conditions:table[[Rock:,Quartzite],[Drilling rate:,1.3mmin (Penetration rate)],[Position, collar & retract time:,3.2minhole

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3 DRILLING AND BLASTING OPERATIBNS

(a) Main line drilling jumbo, (b) Straddle type drilling jumbo, and (c) Truck mounted drilling jumbo. 3.3.1 Main Line Drilling Jumbo The main line type drilling jumbo (Figure 3.3) has collapsible platforms on the sides which are raised into horizontal position for drilling, charging and setting tunnel supports.

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Investigations on rock drillability applied to …

Different rock drillability models have been reviewed in ... 3.0 m in height using a rotary percussive electro-hydraulic drill jumbo. In order to meet a development rate of 3,600 meters ... a confined solid or aggregated specimen of intact rock. Drilling Rate Index, Siever's J and S-20 value, Recent Advances in Rock Engineering (RARE 2016)

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A new empirical model for prediction of jumbo drills' penetration rate

An efficient approach for real-time prediction of rate of penetration in offshore drilling. Mathematical Problems in Engineering. 2016, vol. 3, pp. 375— 380 DOI: 10.1155/2016/3575380. 28. Hung N. V., Gerbaud L., Souchal R., Urbanczyk C., Fouchard C. Penetration Rate prediction for percussive drilling with rotary in very hard rock.

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What is the rate of jumbo drilling?

Introduction to Jumbo Drilling Rates In the complex and demanding field of underground construction, jumbo drilling plays a pivotal role. The rate at which tunneling jumbos operate is a critical metric, impacting both the efficiency and cost-effectiveness of construction projects. Understanding the rate of jumbo drilling involves examining various factors such as the type of …

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Assessment of relationships between drilling rate index …

When using a rock TBM it is necessary to remember that its standard performance can be evaluated on the basis of rock mass properties (Barton, 2000).A "limiting situation" for a TBM is when and where a machine cannot work in the way for which it was designed and manufactured, and the advance is significantly slowed down or even obstructed (Pelizza and …

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Prediction of jumbo drill penetration rate in underground …

The Rock Drillability Index (RDi) being unaffected by rock type suggests that the prediction models developed in this study can estimate jumbo drill performance across different …

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Underground Face and Jumbo Drill Rigs for Mining and …

The underground jumbo drill rigs from Epiroc are used for blast hole drilling in underground mining and tunneling. The rigs are equipped with up to four booms, covering cross sections from 6 m 2 to 206 m 2.We offer underground jumbo drill rigs with our reliable Direct Control System, DCS, or with the computerized Rig Control System, RCS, to which different levels of automation may …

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Efficiency evaluation of a percussive drill rig using rate …

The input parameters consist of the weight on bit (WOB), the rotary speed (RPM), the flow rate (Q), and so on. Some of these parameters are similar to those of the rock drilling jumbo, whereas some are different. Therefore, a prediction model of the drilling rate is required for the percussive drill rig.

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Types of Underground Rock Drills | An Underground Miner

Rock Drills are usually mounted on feeds on equipment known as Jumbo Drills and then directed to where they are supposed to drill holes.. The feeds are attached with booms that resemble arms and are flexible. The flexibility is meant to allow you to adjust the unit depending on where you want to drill. Drills use power packs, which are made up of hydraulic pumps and …

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Prediction of jumbo drill penetration rate in underground …

This study investigates various regression and machine learning methods, including Multilayer Perceptron (MLP), Support Vector Regression (SVR), and Random …

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An Investigation of Different Drill Bits and Drilling Angles in …

The main specifications of jumbo driller. Rock drill Feed Boom Drilling system Length Width Height Turning radius Weight Table 5. 2 × COP 1838ME 2 × BMH 2831–BMH 2849 2 × BUT 28 RCS 11820 mm (with BMH 2843) 1980 mm 2300 mm (3000 mm roof up) 3000/5500 mm 17500 kg Operation parameters during drilling. ... So the penetration rates of two ...

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Prediction of jumbo drill penetration rate in

Translate this article into 20 different languages! × If you log in through your library or institution you might have access to this article in multiple languages.

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Performance Evaluation of Button Bits in Coal Measure Rocks …

Electro-hydraulic and jumbo drills are commonly used for underground coal mines and tunnel drives for the purpose of blasthole drilling and rock bolt installations. Not only machine parameters but also environmental conditions have significant effects on drilling. This study characterizes the performance of button bits during blasthole drilling in coal measure rocks by …

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Efficiency evaluation of a percussive drill rig using rate …

The drilling-blasting method is widely used in tunnel construction, and a rock drilling jumbo with two to four booms as the main equipment is used to drill blasting holes for planting explosives in the rock. The most important component of the rock drilling jumbo is the percussive drill rig, which is installed on the booms (Navarro et al., 2019 ...

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Jumbo drilling in an underground hard rock mine

Drill penetration rate is influenced by many controllable and uncontrollable parameters such as intact rock, rock mass, bit, machine's design and operational parameters with varying degree of ...

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Prediction of jumbo drill penetration rate in …

Estimating penetration rates of Jumbo drills is crucial for optimizing underground mining drilling processes, aiming to reduce costs and time.

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Investigations on rock drillability applied to …

3.0 m in height using a rotary percussive electro-hydraulic drill jumbo. In order to meet a development rate of 3,600 meters per annum in a single mine, drill bits alone costs around Rs. …

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A New Empirical Model for Prediction of Jumbo Drills' …

masses, the model demonstrated accurate predictions of jumbo drill penetration rates. Key words: Penetration rate, Jumbo drill, Rock mass drillability index (RDi), NMLR.

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Furukawa jumbo drill

Application of jumbo drill: Jumbo drill is used in various industries such as construction, oil and gas drilling, mining and even military industries. This tool can easily work with different materials such as metal, wood, concrete and even …

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Rate of penetration

Hard, compacted formations drill slow and consistent. Soft formations drill fast and have erratic ROP. Mud weight (Pore Pressure) The drilling rate of shale is very sensitive to the pressure balance between the shale and wellbore. Shales drilled underbalanced are characterized by fast drilling, high gas readings, and large cuttings.

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Prediction of jumbo drill penetration rate in underground

Estimating penetration rates of Jumbo drills is crucial for optimizing underground mining drilling processes, aiming to reduce costs and time.