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Prediction of roadheaders' performance using artificial ...

01/10/2015  Predicting performance is an essential task for efficient application of roadheader and is mainly related to evaluation of instantaneous cutting rate (ICR) for various cutting conditions. ICR is defined as the amount of rock excavated per time of cutting (tons or cubic meter/cutting hour).

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Prediction of roadheader performance: A geotechnical ...

Roadheader type machines are now widely used in mining and tunnelling applications, and encountering the full spectrum of ground conditions. This study examines the key geological and geotechnical factors that influence machine performance and uses a series of influence diagrams to illustrate the complexity of the cutting process.

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ROADHEADER PERFORMANCE PREDICTION

In 1997 the performance of several roadheaders supplied by Mitsui-Miike and Voest-Alpine for these tunnels was studied as a final-year research project by Melbourne University civil engineering student Mark Zurowski. Rock samples were taken from several faces for testing in the Rock Mechanics laboratory at the University of Melbourne.

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Roadheader – A comprehensive review - ScienceDirect

01/01/2020  The roadheader is a machine for excavating rock in mining and civil construction projects. It is a hybrid machine, with better manoeuvrability than that of tunnel boring machines. It can cut rocks even up to 160 MPa, if laminated or fractured, in different tunnel profiles and adapts easily to changing operational conditions.

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(PDF) ROADHEADERS PERFORMANCE OPTIMIZATION FOR

Roadheader performance and related parameters are reviewed and their effects on the production and advance rate are discussed. Among the parameters influencing the machine performance, the most...

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Prediction of roadheaders' performance using artificial ...

01/10/2015  Predicting performance is an essential task for efficient application of roadheader and is mainly related to evaluation of instantaneous cutting rate (ICR) for various cutting conditions. ICR is defined as the amount of rock excavated per time of cutting (tons or cubic meter/cutting hour). According to

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Prediction of roadheader performance: A geotechnical ...

Roadheader type machines are now widely used in mining and tunnelling applications, and encountering the full spectrum of ground conditions. This study examines the key geological and geotechnical factors that influence machine performance and uses a series of influence diagrams to illustrate the complexity of the cutting process.

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Roadheader – A comprehensive review - ScienceDirect

01/01/2020  Seker and Ocak (2017) proposed a performance prediction of the roadheader on the basis of 6 different machine learning algorithms such as Zero R, random forest (RF), Gaussian process, linear regression, logistic regression and multi-layer perceptron (MLP).

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(PDF) ROADHEADERS PERFORMANCE OPTIMIZATION FOR

Roadheader performance and related parameters are reviewed and their effects on the production and advance rate are discussed. Among the parameters influencing the machine performance, the most ...

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Cutting performance evaluation of a roadheader machine by ...

14/02/2018  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. As ...

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Intelligent design and simulation of roadheader cutting head

The cutting head is an important part of roadheader, which directly acts on the coal and rock in the work process, and its performance affects the efficiency of the entire excavation. Cutting pick distributes in cutting head body according to certain spatial position and angle, and completes the crushing of

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ROADHEADER IN TUNNELING

• High cutting performance in soft and medium hard rock (up to 130 m³/NCH) SELECTION CRITERIA FOR EXCAVATION METHOD . EXAMPLES – ROADHEADER SELECTION . 8 • Flexible system – profile, alignment • Accurate profiling – less over break, less concrete cost • Low primary investment • Fast mobilization . PARAMETER FOR ROADHEADER CUTTABILITY REPRESENTATIVE ROCK SAMPLING . 9 Batching ...

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Analytical hierarchy process for selection of roadheaders

performance predictions (specific energy, cutting rate, etc.) of ... So in the roadheader selection process, the multiple criteria decision-making methods, defined as ‘selecting the appropriate alternative for an aim related to various criteria’, can be used. The use of analytical hierarchy process for selecting roadheaders When using a multiple criteria decision-making method, the ...

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Research Article Study on Roadheader Cutting Load at ...

uencing the performance of roadheader in mechanized drivage operation, which mainly include the physical and mechanical properties of coal and rock and the structural parameters itself. As the direct working mechanism of roadheader, cutting head works in poorworkingconditions.ecuttingpickswearandfracture andthefall

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Development of Position System of a Roadheader on a Base ...

Development of Position System of a Roadheader on a Base of Active IR-Sensor Markvardt Romana*, Breido Josifa, ... This is to ensure the accurate performance of tunnel works. On the basis of this system will be calculated position of the working organ and transmitted to the operator to ensure the visualization process. Currently, such systems exist for continuous tunneling machines, but has a ...

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(PDF) Predicting roadheader performance by using ...

Predicting roadheader performance by using artificial neural network

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Cutting performance evaluation of a roadheader machine by ...

14/02/2018  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. As ...

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Stability Analysis of Roadheaders

roadheader with point attack cutters and with mini-disc there might be a stability problem not only in arcing cutting mode but also in lowering and sumping cutting modes [26]. 4. Conclusion These results show that success of a roadheader performance and design should also include the stability analysis of the machine. Unstable states can cause ...

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Analytical hierarchy process for selection of roadheaders

performance predictions (specific energy, cutting rate, etc.) of ... So in the roadheader selection process, the multiple criteria decision-making methods, defined as ‘selecting the appropriate alternative for an aim related to various criteria’, can be used. The use of analytical hierarchy process for selecting roadheaders When using a multiple criteria decision-making method, the ...

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Roadheaders in Tunneling - Tunnel Business Magazine

30/07/2013  The roadheader does require a greater investment than an Crusher with a roadheader attachment. The Crusher’s performance, however, is limited because it is dependent on the hydraulic power capabilities of the Crusher. Attachments are extremely flexible in large tunnels for scaling, cutting manholes, Gypsumers and excessive grouting. A disadvantage of using an Crusher with roadheading ...

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Development of Position System of a Roadheader on a Base ...

Development of Position System of a Roadheader on a Base of Active IR-Sensor Markvardt Romana*, Breido Josifa, ... This is to ensure the accurate performance of tunnel works. On the basis of this system will be calculated position of the working organ and transmitted to the operator to ensure the visualization process. Currently, such systems exist for continuous tunneling machines, but has a ...

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Roadheader solutions in focus - tunneltalk

The roadheader range is based on the MT-series that comprises four models from the 57 tonne MT360 to the 135 tonne MT720. They are all equipped with powerful, geometrically optimized transverse cutter heads, which are proven to provide efficient cutting performance in a wide range of rock formations. Transport tunnels, shaft sinking, rehabilitation of existing tunnels and excavation of ...

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Study on Roadheader cutting load at different properties ...

01/01/2013  Roadheader 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 process. This paper uses the method of numerical simulation of cutting process of cutting pick and cutting head and ...

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Case Analysis and Application of Roadheader Remote Control ...

In the actual production process, the roadheader driver needs to operate the roadheader manually. Due to the existence of blind area, over excavation and under excavation often occur, which affects the quality and speed of the roadheader. The roadheader driver is in the goaf for a long time, the production environment is bad, and the life safety is seriously threatened. Due to the continuous ...

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Roadheader performance

Application performance is critical in high-performance computing (HPC), however, it is not considered in a systematic way in the HPC software development process. Integrated performance models could improve this situation. Advanced analytic performance modeling and performance analysis tools exist in isolation but have similar goals and could benefit mutually. We find that existing analysis to...

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