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STUDY OF THE DEPENDENCE BETWEEN THE CUTTING DIRECTION RELATIVE TO STRATIFICATION AND THE DIGGING CHARACTERISTICS OF LIGNITE IN OLTENIA COAL BASIN (ROMANIA)
Abstract
The paper deals with the theoretical and practical analysis of the influence that the cutting direction of the bucket wheel excavator has on the digging forces acting on the wheel. Usually, when the terrace cut technology is applied, the bucket wheel of the excavator cuts vertical chips where mainly the perpendicular to stratification digging method is predominant. All the laboratory trials - done on the test rig - were conducted mainly for this type of vertical chip cutting. In cases when the drop cut method is applied, (or in the case of excavations done below the bench level in the terrace cut method), the main cutting direction used is the parallel to the stratification one. The paper presents the comparison between the practical results obtained on cuts both perpendicular to the stratification and also parallel to the stratification, performed using the linear cutting test rig in the laboratory, on overburden rock or lignite samples that were taken from the same seam and same open pit mine.
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References5
Tomuș O.B. - Studiul posibilităților de creștere a performanțelor rotorului excavatoarelor utilizate în carierele de lignit. Teză de doctorat. Petroșani, 2009
Kovacs, I., Andraș, I., Andraș, A., Tomuș, O.B. –Overview Of The Results Obtained In The Field Of Rock Cutting In Underground And Open Pit Conditions. - Monografia Nowoczesne Metody Eksploatacji Wegla I Skal Zwiezlych. pag. 9 – 16, Akademia Gorniczo-Hutnicza. Krakow 2013
I. Kovacs, M.S. Nan, D. Jula, O.B. Tomus - New Buckets Mounted on Rotor Excavators, as a Result of Dislocation Tested Process –, International Conference on Applied Computer Science, Malta September 15-17, 2010, ISSN: 1792-4863; ISBN: 978-960-474-225-7;
Kovacs I, Iliaș N, Nan M.S. – Regimul de lucru al combinelor miniere, Editura Universitas, Petroșani, 2000
Kovacs I, Andras I, Nan M.S., Popescu F.D., Theoretical and experimental research regarding the determination of non-homogenons materials mechanical cutting characteristics, Proceedings of the 8th International Conference on Simulation, Modelling and Optimization, Santander, Cantabria, Spain, September 23-25, 2008, ISSN: 1790-2769, ISBN: 978-960-474-007-9, pp.232…235;
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