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• ### Effect of cutting angle on the performance of the

2021-3-19 · Parametric modeling for cutting picks and pick holder As shown in Figure 2, according to the size of the pick and pick holder, enter the relevant design parameters, including the industry standard values and custom parameters, and these parameters can also be given the recommended values. Based on ANSYS software, and using APDL parametric design language to build model library of cutting pick and pick holder, while provide the functions …

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• ### (PDF) Prediction of Wear of Roadheader Picks Using ...

2021-6-10 · The cutting head is a key component of a roadheader’s cutting function, and its design level directly determines the performance of the whole machine to a certain extent. Taking the installation angle of the pick-shaped cutter on the head of the roadheader as a research object, a conversion relationship model between the mounting angle of the cutter and the angle of the cutting function was …

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• ### Effect of cutting angle on the performance of the head of ...

The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the ...

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• ### Roadheader – A comprehensive review - ScienceDirect

2.1. Cutting function angle and installation technology angle There are 6 degrees of freedom in the pick sp ace for the cutting head of the roadheader, and its position is determined by the coordinates of the tip point ( < , 4 , à ) and the mounting angle of the pick.

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2020-1-1 · 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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• ### Prediction of roadheaders' performance using artificial ...

2016-3-5 · Its function allows the intermitting control for spraying to each pick (tool- system). The sectional control is integrated in the cutter head and its connection to the cutter gear.

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• ### CUTTING PERFORMANCE ASSESSMENT OF A MEDIUM

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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• ### The Research of Pick Cutting Performance Based on

2010-7-21 · Roadheaders are the most widely used underground partial-face excavation machines for low to medium strength rocks. They are used for both development and production in soft rock mining industry (i.e. main haulage drifts, roadways, cross-cuts, etc.) particularly in coal, sedimentary rocks, industrial minerals and evaporitic rocks.

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2013-11-4 · The performance of the cutting head directly determines the overall performance of the roadheader, and the improper selection of cutting picks with discomfort conditions of coal and rock will directly cause the failure of the cutting head and even the whole equipment, resulting in unnecessary accidents and losses.

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• ### Prediction of Wear of Roadheader Picks Using

2008-1-1 · The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the hardness of the worn material as …

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2016-3-5 · SANDVIK Roadheader MR340, MR360 – (ATEX approved) Page 1 of 28 www.sandvik.com Technical description-MR340 MR360 ATEX approved Specification.500.Rev1. The model MR360 is identical to the model MR340 with the only difference that it allows to cut a higher profile (see technical data and cutting profile).

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• ### The Research of Pick Cutting Performance Based on

In order to perfect the theory of coal mine tunnel heavy roadheader experimental system, this paper takes the different function samplings of the experimental station module fake rock wall,by the cutting performance research on the fake rock wall of the roadheader experiment station with pick,finding the pick strength characteristics under cutting the different hard rock walls.

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• ### Prediction of roadheaders' performance using

2015-10-1 · Performance prediction is an important issue for successful roadheader application and generally deals with machine selection, production rate and bit consumption. The main aim of this research is to investigate the cutting performance (instantaneous cutting rates (ICRs)) of medium-duty roadheaders by using artificial neural network (ANN) approach.

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• ### Industry • The history of roadheaders - FAMUR PRO

An electrohydraulic hybrid power cutting transmission system for roadheader under specific working condition was proposed in this paper. The overall model for the new system composed of an electric motor model, a hydraulic pump-motor model, a torsional planetary set model, and a hybrid power train model was established. The working mode characteristics were simulated under the conditions of ...

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• ### Performance Analysis of a Hybrid Power Cutting

2017-9-14 · The cutting picks are laid out regularly on the cutting head, and are the main tool for cutting and breaking coal and rock. The pick lacing (especially the pick working angle) plays a key role in specific energy consumption, cutting load fluctuation, and the stability of the whole roadheader [3]. The cutting pick is typically a conical pick ...

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• ### Effect of pick working angle on the cutting performance of

2013-2-8 · Prediction 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 performance ...

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• ### Prediction of Wear of Roadheader Picks Using

2008-1-1 · The paper presents prediction of wear of roadheader picks using numerical simulations. Estimation of wear has been included into the numerical model of rock cutting based on the discrete element method. The amount of wear is calculated using the classical formula of Archard. The wear model takes the influence of temperature by considering the hardness of the worn material as …

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• ### Research on Intelligent Yaw Control of Roadheader

cutting head is driven by a cutting motor to rotate, cutting the coal and rock with the picks. And through the rotation and lifting hydraulic cylinder driven cantilever swing to achieving in cutting any position. When the roadheader is working, the cutting motor is in constant power state. Under normal circumstances, the greater the cutting ...

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2013-1-1 · The cutting picks wear and fracture and the fall-off of tool bit usually occur during the cutting process; in some driving working faces, there will be cutting hard degree that does not adapt to the cutting picks; all these phenomena result in the unreasonable use of cutting picks [1]. ... The poor working environment of roadheader cutting head ...

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• ### Arch. Min. Sci. 62 (2017), 4, 775-793

This article discusses the terms of selection for a system of picks running along the side of roadheader transverse cutting heads in order to eliminate boom resonance vibrations on the cut-ting system. The object studied was a telescopic boom designed for a roadheader with a cutting system capacity of 200250 kW (Fig. 1a).

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• ### Missouri University of Science and Technology Scholars'

2021-4-12 · roadheader that its cutting system was capable of maintaining progress when cutting rocks of hardnesses far in excess of those for which it was designed to function in. This aspect, namely the limitations of the roadheader cutting system relative to rock hardness and …

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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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• ### Effect of pick working angle on the cutting performance of

2017-9-14 · The cutting picks are laid out regularly on the cutting head, and are the main tool for cutting and breaking coal and rock. The pick lacing (especially the pick working angle) plays a key role in specific energy consumption, cutting load fluctuation, and the stability of the whole roadheader [3]. The cutting pick is typically a conical pick ...

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• ### Predicting cuttability with surface miners - A rockmass ...

2010-4-12 · k3 = influence of specific cutting condition and is a function of no sumping, cutting height, cuter head oscillation, pick array, pick shape. However, for roadheader its value ranged from 3.5 – 4.5. Gehring[26] classified rock for application of TBM and roadheader based on the Voest-Alpine Rock Cuttability Index (VARCI) as given in Table 4.

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• ### Missouri University of Science and Technology Scholars'

2021-4-12 · roadheader that its cutting system was capable of maintaining progress when cutting rocks of hardnesses far in excess of those for which it was designed to function in. This aspect, namely the limitations of the roadheader cutting system relative to rock hardness and …

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• ### Research on Intelligent Yaw Control of Roadheader

cutting head is driven by a cutting motor to rotate, cutting the coal and rock with the picks. And through the rotation and lifting hydraulic cylinder driven cantilever swing to achieving in cutting any position. When the roadheader is working, the cutting motor is in constant power state. Under normal circumstances, the greater the cutting ...

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• ### ANALYSIS OF MECHANIZED MINING TECHNOLOGIES

2016-2-23 · the cutting thickness are calculated in function of the rock salt physical and mechanical characteristics. The rock salt face penetration is achieved by the road header arm adjustment or the roadheader motion, whereas the cutting arm revolves in horizontal way. The loading table, in the cutting …

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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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• ### China XCMG Offical Roadheader Machine Ebz135

The hydraulic system of EBZ135 roadheader adopts transfer case, several pumps control, with main hydraulic components coming from international brands. 3,Cutting head The cutting head is optimized by utilizing simulation technique and picks come from Kennametal Co., Ltd. With reasonable layout and strong rock breaking capacity.

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• ### Multi Variable Multi Objective Optimization for the ...

Roadheader cutting head design parameters include rotational speed, yawing speed, cutting line spacing and teeth numbers on each cutting line. They all have an important effect on the performance of roadheader, which is mainly includes producing dust quantity, cutting specific energy, production efficiency and load fluctuations. Based on the cutting performance analysis of a single cutting ...

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• ### Recognition of cutting rock hardness by hydraulic

2021-3-29 · The average recognition accuracy of the heavy-duty roadheader in the test is 92.01%. The experimental results indicate that the model can effectively identify the rock hardness under different cutting conditions. This study can be used for online identification of rock hardness and provide reliable basis for the automatic control of roadheader.

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China Roadheader manufacturers - Select 2021 high quality Roadheader products in best price from certified Chinese Excavator, Drill Machine suppliers, wholesalers and …

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• ### New computer simulation procedure of heading face

Simulation of rock cutting by the finite element method. International ANSYS conference proceedings, 61-71. [23] Sobota P., 2015. The impact of the roadheader boom settings and pics position on the cutting depth. 34th International Conference “Technical diagnostics of machines and manufacturing equipment DIAGO 2015”, 249-257.

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• ### Parametric Design of Cutting Head of Roadheader and ...

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Cutting pick can be divided into flat pick and pick-like bit two kinds according to the geometric shape. For the two types of cutting pick, pick-like bit is most widely used, since it has self-sharpening and shock resistance, and it’s suitable for cutting hard rock characteristics etc. At present the new roadheader all adopt pick-like bit.

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• ### Research on Intelligent Yaw Control of Roadheader

2013-1-1 · The cutting picks wear and fracture and the fall-off of tool bit usually occur during the cutting process; in some driving working faces, there will be cutting hard degree that does not adapt to the cutting picks; all these phenomena result in the unreasonable use of cutting picks [1]. ... The poor working environment of roadheader cutting head ...

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• ### Arch. Min. Sci. 62 (2017), 4, 775-793

cutting head is driven by a cutting motor to rotate, cutting the coal and rock with the picks. And through the rotation and lifting hydraulic cylinder driven cantilever swing to achieving in cutting any position. When the roadheader is working, the cutting motor is in constant power state. Under normal circumstances, the greater the cutting ...

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• ### XCMG Official Tunneling Roadheader Small Mining

This article discusses the terms of selection for a system of picks running along the side of roadheader transverse cutting heads in order to eliminate boom resonance vibrations on the cut-ting system. The object studied was a telescopic boom designed for a roadheader with a cutting system capacity of 200250 kW (Fig. 1a).

Get Price
• ### Predicting cuttability with surface miners - A rockmass ...

XCMG Official Tunneling Roadheader Small Mining Roadheader EBZ135. ... the latter is reasonable in design and equipped with leakage detection function. 4. First freighter Straight structure is adopted for first freighter, which can achieve smooth lapping with hauler bed and transportation. ... Height of Range of positioning cutting. 4740/4350 mm.

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• ### China XCMG Offical Roadheader Machine Ebz135

2010-4-12 · k3 = influence of specific cutting condition and is a function of no sumping, cutting height, cuter head oscillation, pick array, pick shape. However, for roadheader its value ranged from 3.5 – 4.5. Gehring[26] classified rock for application of TBM and roadheader based on the Voest-Alpine Rock Cuttability Index (VARCI) as given in Table 4.

Get Price
• ### Dominant Cutting Parameters Affecting the Specific

The hydraulic system of EBZ135 roadheader adopts transfer case, several pumps control, with main hydraulic components coming from international brands. 3,Cutting head The cutting head is optimized by utilizing simulation technique and picks come from Kennametal Co., Ltd. With reasonable layout and strong rock breaking capacity.

Get Price