cutting rate of roadheader

cutting rate of roadheader

New model for predicting Instantaneous Cutting Rate

2016-2-29  Roadheaders are mechanical excavators which have been extensively used in tunneling, mining and civil engineering works. Performance prediction of the roadheader is major factor in determining the economy of an underground excavation project. In this study, a new model for predicting the Instantaneous Cutting Rate (ICR) has been developed.

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Prediction of roadheaders' performance using artificial

2015-10-1  Gehring (1989) developed equations for predicting cutting rate of axial and transverse type roadheaders as (1) I C R = 719 U C S 0.78 for transverse type roadheaders, and (2) I C R = 1739 U C S 1.13 for axial type roadheaders, where ICR and UCS are the instantaneous cutting rate (m 3 /h) and the uniaxial compressive strength (MPa), respectively.

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ROADHEADER PERFORMANCE PREDICTION

2018-6-28  roadheader performances in the vicinity of the sampled sites. Table 2 shows correlations between Predicted Cutting Rates and observed Production Cutting Rates. PREDICTION METHOD Coefficient of CORRELATION FORMULA Determination y = PRODUCTION CUTTING RATE (m3/hr) 2r x = PREDICTED CUTTING RATE (m3/hr) BILGIN (2.5:1) 0.3490.78 y = 10.75*(x )

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Cutting Performance of Jack Hammers and Roadheaders

2005-1-31  The results show that the instantaneous cutting rates of roadheaders are almost twice than that of the jack hammers. Machine utilization time being 22 % for roadheader and 15 % for

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Roadheader A comprehensive review ScienceDirect

2020-1-1  Keles (2005) determined the instantaneous cutting rate (ICR) of the boom type, medium weight milling type roadheader (MK-2B) by regression analysis to correlate ICR and rock properties and established that ICR is having highest correlation with lab cutting specific energy i.e. (R 2 = 0.8411).

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Prediction of roadheader performance by artificial

The performance of a roadheader was recorded in order to determine the instantaneous cutting rate of the machine. • Artificial Neural Network (ANN) technique is used for predicting of the ICR of the roadheader. • Empirical comparisons are carried out for roadheader performance. •

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CUTTING PERFORMANCE ASSESSMENT OF A MEDIUM

2010-7-21  In this thesis, in-situ instantaneous cutting rates of boom type, medium-weight milling type roadheaders (Mk-2B) at Çayırhan Coal Mine are determined by studying previous performance tests and carrying out additional underground cutting tests.

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ROADHEADER IN TUNNELING

2016-9-27  Parameter on Roadheader Cuttability Net Cutting Rate (NCR) and Specific Pick Consumption (SPC) ROADHEADER IN TUNNELING. S. TATION EXCAVATION, EAST SIDE ACCESS . 38 . ROADHEADER IN TUNNELING. NORTHCONNEX AND WESTCONNEX, AUSTRALIA. 39 • Connecting M1 at Wahroonga to M2 at West

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Rock Mechanical Aspects of Roadheader Excavation

2015-10-10  The Cutting Rate [solid m³/ch] (CR) is calculated from the excavated solid rock volume divided by the Cutting Time [ch cutting hour] and besides the cutting includes all secondary operations of the roadheader. Besides the influences coming from the machinery layout and geology this

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The performance prediction of roadheaders from easy

2015-10-3  where ICR is the instantaneous cutting rate (m 3 /h), P is the cutting head power (kW or HP), k is the energy transfer ratio (0.85–0.90 for TBMs and 0.45–0.55 for roadheaders), SE is the specific energy (kWh/m 3), k 1, is the correction factor for ground stress (≈1.3 for considerable stress), and k 2 is the correction factor for geological discontinuities (0.5 for RQD = 20–30 % and 0.7 for RQD = 30–50 %).

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cutting rate of roadheader desiridder.nl

cutting rate of roadheader Cutting Head. Roadheader solutions in focus TunnelTalk. Cost factors are increasingly prevalent when choosing the tunnel excavation method and for excavation of rock of less than 100 MPa, tunnelling with a roadheader can provide Learn More

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ROADHEADER PERFORMANCE PREDICTION

2018-6-28  roadheader performances in the vicinity of the sampled sites. Table 2 shows correlations between Predicted Cutting Rates and observed Production Cutting Rates. PREDICTION METHOD Coefficient of CORRELATION FORMULA Determination y = PRODUCTION CUTTING RATE (m3/hr) 2r x = PREDICTED CUTTING RATE (m3/hr) BILGIN (2.5:1) 0.3490.78 y = 10.75*(x )

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Prediction of roadheader performance by artificial

The performance of a roadheader was recorded in order to determine the instantaneous cutting rate of the machine. Artificial Neural Network (ANN) technique is used for predicting of the ICR of the roadheader. Empirical comparisons are carried out for roadheader performance. Comparisons of empirical and ANN models are carried out for roadheader

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Cutting performance evaluation of a roadheader

2018-2-14  A roadheader machine is important mechanical equipment for roadway drivage through mechanical crushing. Through analysis and research to discover the key parameters relating to the cutting performance of the roadheader machine, the performance of the roadheader machine must be optimized and costs reduced, as well as productivity increased.

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Cutting performance evaluation of a roadheader

As coal mining technology has continuously evolved, gradually the industry has moved toward fully mechanized mining. A roadheader machine is important mechanical equipment for

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Rock Mechanical Aspects of Roadheader Excavation

2015-10-10  The Cutting Rate [solid m³/ch] (CR) is calculated from the excavated solid rock volume divided by the Cutting Time [ch cutting hour] and besides the cutting includes all secondary operations of the roadheader. Besides the influences coming from the machinery layout and geology this

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Roadheader Excavation Performance Geological And

1999-8-25  Excavation performance is a' term used in underground construction to describe the influence of a number of parameters on the cutting rate and the tool wear of a roadheader. The interaction of the main factors is illustrated in Figure 1. (Figure in full paper)

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ROADHEADERS PERFORMANCE OPTIMIZATION

2010-1-12  The roadheader production rate and bit costs are controlled by several parameters including: Rock parameters, such as rock compressive and tensile strength, percent of hard and abrasive mineral content (i.e. quartz), rock fabric and matrix type and hardness, existence of oriented

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Geotechnical Risk Assessment and Selection of Suitable

2020-10-13  Then by using an instantaneous cutting rate model, the cutter head power of the roadheader was determined. According to the model, a lightweight roadheader with a cutter head power of about 80-110 KW and 40 t weight are suitable. Finally, four types of manufactured roadheader with similar specifications were selected. INTRODUCTION

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The performance prediction of roadheaders from easy

2015-10-3  An accurate prediction of roadheader performance helps to make for more efficient and cost effective planning of tunneling projects. In this study, the performance prediction models for roadheaders were developed by using easy testing methods such as Brazilian tensile strength, point load strength, block punch strength, ultrasonic velocity, density, porosity, and the water absorption ratio.

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cutting rate of roadheader desiridder.nl

cutting rate of roadheader Cutting Head. Roadheader solutions in focus TunnelTalk. Cost factors are increasingly prevalent when choosing the tunnel excavation method and for excavation of rock of less than 100 MPa, tunnelling with a roadheader can provide Learn More

get price

Cutting performance evaluation of a roadheader

2018-2-14  A roadheader machine is important mechanical equipment for roadway drivage through mechanical crushing. Through analysis and research to discover the key parameters relating to the cutting performance of the roadheader machine, the performance of the roadheader machine must be optimized and costs reduced, as well as productivity increased.

get price

Rock Mechanical Aspects of Roadheader Excavation

2015-10-10  The Cutting Rate [solid m³/ch] (CR) is calculated from the excavated solid rock volume divided by the Cutting Time [ch cutting hour] and besides the cutting includes all secondary operations of the roadheader. Besides the influences coming from the machinery layout and geology this

get price

ROADHEADER IN TUNNELING

2016-9-27  Parameter on Roadheader Cuttability Net Cutting Rate (NCR) and Specific Pick Consumption (SPC) ROADHEADER IN TUNNELING. S. TATION EXCAVATION, EAST SIDE ACCESS . 38 . ROADHEADER IN TUNNELING. NORTHCONNEX AND WESTCONNEX, AUSTRALIA. 39 • Connecting M1 at Wahroonga to M2 at West

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Cutting performance evaluation of a roadheader

As coal mining technology has continuously evolved, gradually the industry has moved toward fully mechanized mining. A roadheader machine is important mechanical equipment for

get price

Roadheader Excavation Performance Geological

1999-8-25  Excavation performance is a' term used in underground construction to describe the influence of a number of parameters on the cutting rate and the tool wear of a roadheader. The interaction of the main factors is illustrated in Figure 1. (Figure in full paper)

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Research Article Study on Roadheader Cutting Load at

2019-7-31  uence on cutting head instantaneous cutting rate and the cutting specic energy consumption. Bilgin et al. [ ] studied some geological and geotechnical factors a ecting the performance of a roadheader in an inclined tunnel. However, the domestic researchers have not researched the in uence of the properties of coal and rock

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Hard Rock Cutting with Roadheaders the Icutroc Approach

Cutting porphyroide with a compressive strength ranging between 90 and 200 MPa, the pick consumption could be lowered by 75 % and the cutting rate increased by 25 to 75 %. Since that time, Roadheaders of the ICUTROC-generation have excavated motorway tunnels in Italy and

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BREAKTHROUGHS IN TUNNELING 2019 DRILL & BLAST

2019-9-25  cutting rate. The effective netcutting timeis definedby the timethe cutter headis in contactwiththerock and actuallycutting.Thus, supplementary actions of the cutter headlikeprofiling andloading or any idling time during cutting operation does not contribute to the effectivenet cutting time.

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SCR Series Roadheader A Hard Worker For Non

The velocity of cutting line matches well with the rock by the higher single cutting capacity of cutting teeth. The arrangement of cutting teeth has reached the world leading level with the strong rock breaking ability, the high cutting efficiency and the low cutting teeth consumption rate.

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