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roadheader excavation performance

  • (PDF) Performance of a roadheader under harsh working

    Roadheaders are versatile excavation machines which are used for many purposes such as mining, tunnelling, shaft boring and underwater excavation etc Due to the popularized usage, performanceApr 08, 2020· Investigation into roadheader excavation performance and pick consumption used in KadikoyKartal Metro Tunnels Proceeding of the 2nd Symposium on Underground Excavations for Transportation, vol parative studies on the performance of a roadheader

  • Comparative studies on the performance of a roadheader

    Mar 01, 2010· I Ocak, Y Eyigun, M Cinar, T NahyaInvestigation into roadheader excavation performance and pick consumption used in Kadikoy–Kartal Metro Tunnels Proceeding of the 2nd Symposium on Underground Excavations for Transportation, vol 138, Publication of Turkish Chamber of Mines, Istanbul, Turkey (2007), pp 199206An assessment on roadheader application will include estimates on excavation performance and cutting tool we ar , both parameters being significantly dependent from rock strength, rock abrasivity(PDF) Rock Mechanical Aspects of Roadheader Excavation

  • Roadheader – A comprehensive review ScienceDirect

    Jan 01, 2020· Rostamiet al, 1994, Rostamiet al, 1994 developed a computer program for roadheader design optimization and performance prediction, and used it to check a heavyduty roadheader of the 100ton weight class (AM105) They found that the excavation rate was 40 to 100 ton/hr in such heavyduty roadheadersSandvik's MT series of roadheaders offers the best cutting performance in a wide range of rock formations Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used for a wide range of applications They can also be used for rehabilitation of existing tunnels, and excavation of underground cavernsRoadheaders Tunneling For Most Rock Formations | Sandvik

  • roadheader reclamation facilitated

    Roadheader excavation performance excavation performance and tool wear in soft and hard rock Every now and again problems have been encountered leading to high bit consumption and low cutting performance of roadheaders In this paper the connectionRoadheader cutting head load has an important influence on the machine's performance, as the object of cutting and coal and rock characteristics have a significant impact on the cutting load Traditional methods cannot accurately obtain the theoretical dynamic loads of cutting processStudy on Roadheader Cutting Load at Different Properties

  • Prediction of roadheader performance by artificial neural

    Sep 01, 2014· In the literature, one of the most accepted laboratory predictive methods to estimate machine excavation performance is to use cutting power of roadheader, optimum SE value obtained from full scale rock cutting test, and energy transfer ratio (k)Roadheaders are very versatile excavation machines used in tunnelling, mine development, and mine production for soft to medium strength rock formations Performance prediction is an important factor for successful roadheader application and generally deals withA model to predict the performance of roadheaders based on

  • (PDF) Roadheader applications in mining and tunneling

    The performance prediction of a roadheader to be used is important for designing the projects and cost estimation There are some performance prediction models for roadheaders in the literatureMar 01, 2010· I Ocak, Y Eyigun, M Cinar, T NahyaInvestigation into roadheader excavation performance and pick consumption used in Kadikoy–Kartal Metro Tunnels Proceeding of the 2nd Symposium on Underground Excavations for Transportation, vol 138, Publication of Turkish Chamber of Mines, Istanbul, Turkey (2007), pp 199206Comparative studies on the performance of a roadheader

  • ROADHEADER PERFORMANCE PREDICTION

    ROADHEADER PERFORMANCE PREDICTION Assessment Of Rock Cuttability, And Prediction Of Roadheader Performance • Farmer uses the joint frequency across the face of the excavation • Gehring uses the average joint spacing across the face of the excavation • Bilgin uses the RQD 45 RECORDING THE PERFORMANCE OF ROADHEADER AND COMPARISON OF PREDICTED AND ACTUAL VALUES The performance of roadheader was recorded continuously during tunnel excavation The summary of the roadheader performance is given Table 2 and Figure 10 Monthly advance rates of the roadheader are shown in 818 Figure 6 Unrelieved and relieved cuttingThe performance of a roadheader in high strength rock

  • Performance prediction of roadheaders using ensemble

    Ocak I, Eyigun Y, Cinar M, Nahya T (2007) Investigation into roadheader excavation performance and pick consumption used in KadkoyKartal metro tunnels In: Proceedings of the 2nd symposium on underground excavations for transportation, Istanbul, pp 199206 (in Turkish) Google ScholarRoadheader performance and related parameters are reviewed and their effects on the production and (15,000 psi) is considered to be unsuitable for excavation by roadheaders unless it is highly jointed or fractured This limit reflects the lack of stiffness on the part of machine to hold theROADHEADERS PERFORMANCE OPTIMIZATION

  • Roadheader solutions in focus TunnelTalk

    The roadheader, or header machine, has become a familiar piece of excavating equipment in civil tunnelling The technology is actually younger than may be realised with the first roadheader patent being applied for by Dr Z Ajtay in Hungary in 1949 and developed as a remotely operated priapic miner for exploitation of small seams in coal miningPrediction of roadheader performance plays a significant role in the plan of tunnel construction, which is influenced by different key parameters, including rock strength, discontinuity in rock mass, type and specifications of roadheader machine, and brittleness The main aim of this study is to build a robust empirical equation based on rock mass properties for the roadheader performanceA new model to predict roadheader performance using rock

  • Rock cutting with roadheaders | SpringerLink

    The paper describes with practical case studies how some of the important factors influencing the excavation performance of boom tunnelling machines equipped with drag tools may be predicted The pitfalls of basing performance predictions on compressive strength alone are discussedheavyweight machines It is determined that improvements in cutting performance with the mediumweight machines as compared to lightweight machines is achieved for the rocks requiring laboratory cutting specific energy greater than 5 MJ/m3 Keywords: mediumweight roadheader, performance prediction, cutting specificCUTTING PERFORMANCE ASSESSMENT OF A MEDIUM

  • roadheader reclamation facilitated

    Roadheader excavation performance excavation performance and tool wear in soft and hard rock Every now and again problems have been encountered leading to high bit consumption and low cutting performance of roadheaders In this paper the connectionRoadheader performance factors including productivity and utilisation are mentioned, and the stateoftheart of conventional roadheaders is discussed in the context of machine weight, power and cutting head configuration The influence of these and rock strength on machine productivity is analysedObservations on Drag Tool Excavation and the Consequent

  • Performance prediction of roadheaders in metallic ore

    Feb 01, 2014· The excavation performance of a roadheader with a power of 100 kW were calculated for the tested ores using Eq (1) and given in Table 2 In addition, the instantaneous cutting rates were calculated using the models of other researchers given in Section 2 to make a comparison ( Table 2 )Jul 01, 2019· Bilgin et al (2004) analyzed the roadheader performance in Hereke tunnel which was an inclined tunnel project and reported that the machine utilization time decreased from 38% to 8% in the inclined zones compared to the normal subhorizontal grades Some researchers have also studied roadheader excavation performance in mining industryPerformance of roadheaders in low strength pyroclastic

  • ROADHEADERS PERFORMANCE OPTIMIZATION

    Roadheader performance and related parameters are reviewed and their effects on the production and (15,000 psi) is considered to be unsuitable for excavation by roadheaders unless it is highly jointed or fractured This limit reflects the lack of stiffness on the part of machine to hold theThe paper describes with practical case studies how some of the important factors influencing the excavation performance of boom tunnelling machines equipped with drag tools may be predicted The pitfalls of basing performance predictions on compressive strength alone are discussedRock cutting with roadheaders | SpringerLink

  • Performance prediction of roadheaders using ensemble

    Ocak I, Eyigun Y, Cinar M, Nahya T (2007) Investigation into roadheader excavation performance and pick consumption used in KadkoyKartal metro tunnels In: Proceedings of the 2nd symposium on underground excavations for transportation, Istanbul, pp 199206 (in Turkish) Google Scholarblast or TBM excavation Reasons for this are usually the significant susceptibility regarding encountered rock and rock mass properties as well as general uncertainties about their application An assessment on roadheader application will include estimates on excavation performance andRock Mechanical Aspects of Roadheader Excavation

  • Roadheader solutions in focus TunnelTalk

    The roadheader, or header machine, has become a familiar piece of excavating equipment in civil tunnelling The technology is actually younger than may be realised with the first roadheader patent being applied for by Dr Z Ajtay in Hungary in 1949 and developed as a remotely operated priapic miner for exploitation of small seams in coal mining2 • Rock excavation with roadheaders does in fact provide unique chances especially for underground excavation in urban areas with harsh limitations regarding handling of explosives or noise and vibration emissions • A roadheader will allow excavation with minimumRock Mechanical Aspects of Roadheader Excavation

  • Roadheader Performance Franzburger Wanderausstellung

    Roadheader Performance Stone Crushing Machine: This thesis covers in detail a study of the excavation of rock salt by roadheader the factors affecting performance and finally a specification with operational results of a new production machine to suit the south african coal mining industry dosco ovePrediction of roadheader performance plays a significant role in the plan of tunnel construction, which is influenced by different key parameters, including rock strength, discontinuity in rock mass, type and specifications of roadheader machine, and brittleness The main aim of this study is to build a robust empirical equation based on rock mass properties for the roadheader performanceA new model to predict roadheader performance using rock

  • VMT GmbH GB | TUnIS Navigation Roadheader

    TUnIS Navigation Roadheader The navigation system that has been developed especially for Roadheader provides exact measurement accuracy, top performance and high efficiency in conventional tunnelling for Roadheader excavation (eg NATM) The system combines robust hardware and modern analysis software Precision and speedoperation The performance analysis of roadheader machines plays an important role in the cost and time of underground completion; therefore, correct estimation of the roadheader performance has a key impact on the effective planning of the excavation project [2] Factors affecting the excavation performance include: (i)Application of Soft Computing Methods for the Estimation

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