The Importance of Research on Alternative and Hybrid Rock Extraction Methods

Sifferlinger, Nikolaus August; Hartlieb, Philipp; Moser, Peter

doi:10.1007/s00501-017-0574-y

Cited by 22 publications

(15 citation statements)

References 2 publications

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“…Next, the machine was supposed to work at the Petra Diamond's Finsch diamond mine in South Africa. The project was scheduled to end on 31/12/2019, but no official information has yet been made available (Bergbaunewsletter 2017, Hartlieb, 2017, Hardrock, 2020.…”

Section: Machines For Mining Hardly Workabble Rocksmentioning

confidence: 99%

Machines for Mechanical Mining of Hardly Workable and Abrasive Rocks

Bołoz

Kalukiewicz

2020

Multidisciplinary Aspects of Production Engineering

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Mechanical mining is a widely used method for separating material from mined rock in the mining branch, tunnelling, road and construction industries. Depending on the mechanical properties of rocks, most often defined by uniaxial compressive strength, various machines and tools are applied. Apart from rock strength, the efficiency of the mining process is determined by abrasiveness, which affects the rate of tool abrasive wear. Currently, disc mining by static pressure or rear undercutting are the most developed methods. Undercutting can be supported by high pressure water jet or disk oscillation. Mining with drills also utilizes static pressure. In addition to discs, conical picks are applied; they are mounted on cutterheads. In underground mining and tunnelling, there is an increasing need to cut abrasive rocks with a strength of more than 120 MPa in places where explosive materials cannot be used. In the article, the recently applied and developed methods of cutting abrasive rocks characterized by high strength, such as copper, gold, tungsten or platinum ores and diamond deposits, have been presented. Next, the latest machines and machine systems used for their mining are reviewed. Leaders in the mining machinery industry, such as Joy (Komatsu), Epiroc (Atlas Copco), Sandvik and Aker Wirth are developing proprietary designs of cutting machines based on both well-known and completely new ideas.

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Section: Machines For Mining Hardly Workabble Rocksmentioning

confidence: 99%

Machines for Mechanical Mining of Hardly Workable and Abrasive Rocks

Bołoz

Kalukiewicz

2020

Multidisciplinary Aspects of Production Engineering

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“…However, due to the reaction force of the cutting head is perpendicular to the gravity direction of the roadheader, the lateral slip tends to occur during the swing process. Therefore, the longitudinal cutting head is mainly used for rapid excavation of conventional roadways with uniaxial compressive strength (UCS) is not more than 100MPa [ 1 ]. The cutting heads for the transverse roadheader are arranged symmetrically on both sides of the cutting boom, the rotation axis is perpendicular to the boom, and the picks cut the rock in a ripping way, as shown in Fig 1B .…”

Section: Introductionmentioning

confidence: 99%

A new method for roadheader pick arrangement based on meshing pick spatial position and rock cutting verification

Zhang

Yan

Qin³

2021

PLoS ONE

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This paper proposes a cutting head optimization method based on meshing the spatial position of the picks. According to the expanded shape of the spatial mesh composed of four adjacent picks on the plane, a standard mesh shape analysis method can be established with mesh skewness, mesh symmetry, and mesh area ratio as the indicators. The traversal algorithm is used to calculate the theoretical meshing rate, pick rotation coefficient, and the variation of cutting load for the longitudinal cutting head with 2, 3, and 4 helices. The results show that the 3-helix longitudinal cutting head has better performance. By using the traversal result with maximum theoretical meshing rate as the design parameter, the longitudinal cutting head CH51 with 51 picks was designed and analyzed. The prediction model of pick consumption is established based on cutting speed, direct rock cutting volume of each pick, pick rotation coefficient, uniaxial compressive strength, and CERCHAR abrasivity index. And the rock with normal distribution characteristics of Uniaxial Compressive Strength is used for the specific energy calculating. The artificial rock wall cutting test results show that the reduction in height loss suppresses the increase in pick equivalent loss caused by the increase in mass loss, and the pick consumption in this test is only 0.037–0.054 picks/m3. In addition, the correlation between the actual pick consumption and the prediction model, and the correlation between the actual cutting specific energy and the theoretical calculation value are also analyzed. The research results show that the pick arrangement design method based on meshing pick tip spatial position can effectively reduce pick consumption and improve the rock cutting performance.

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“…Das Potenzial von klassischen Abbauverfahren für selektiven Bergbau ist bis zum jetzigen Zeitpunkt stark begrenzt. Als große Herausforderungen erweisen sich die benötigte Flexibilität und die Fähigkeit, Gestein mit hohen Festigkeiten abzubauen [2,3]. Üblicherweise weisen Bergbaumaschinen ein sehr hohes Gewicht bis zu einigen 100 Tonnen auf, wobei hingegen "klassische" Roboter eher im unteren Bereich (>500 kg) rangieren (Abb.…”

Section: Introductionunclassified

H2020 – Robominers

Berner

Sifferlinger

2021

Berg Huettenmaenn Monatsh

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ZusammenfassungDer folgende Artikel beschäftigt sich mit dem EU-H2020 Projekt ROBOMINERS mit Schwerpunkt auf den Aufgaben der Montanuniversität Leoben, die die Entwicklung der Abbaueinheit eines kleinen Bergbauroboters umfassen. Die einzelnen Technologien werden hinsichtlich ihrer Effizienz und Machbarkeit bewertet, indem vorhandene Technologien untersucht und analytische Studien, Simulationen bis hin zu Konzeptentwicklungen durchgeführt werden. Dies beinhaltet konventionelle, alternative und kombinierte Abbaumethoden. Der Beitrag dieser Arbeit soll weiters eine Richtlinie zur Anwendbarkeit potenzieller Abbaumethoden für Bergbau-Roboter in unterschiedlichen Klassen liefern.

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The Importance of Research on Alternative and Hybrid Rock Extraction Methods

Cited by 22 publications

References 2 publications

Machines for Mechanical Mining of Hardly Workable and Abrasive Rocks

Machines for Mechanical Mining of Hardly Workable and Abrasive Rocks

A new method for roadheader pick arrangement based on meshing pick spatial position and rock cutting verification

H2020 – Robominers

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