PRODUCTIVITY OF THE ECOTRAC 120V SKIDDER FOR TIMBER SKIDDING IN THE AREA OF MU „IGMAN “
DOI:
https://doi.org/10.54652/rsf.2018.v48.i2.41Keywords:
timber skidding, Ecotrac 120V, skidding productivity, time and work studyAbstract
UDK: 630*36:631.372]:65.015(497.6)
This paper presents the research results of the skidding productivity for the Ecotrac 120V skidder in mountainous areas of MU „Igmanˮ in Bosnia and Herzegovina. Time and work study were performed. Multiple regression analysis was used for determination of work operations time consumption depending on influencing factors. The following influencing factors were recorded: the condition of the tractor road (surface), the skidding distance, the winching distance, number of pieces in the load, the volume of the load and the slope of the tractor road. The share of productive time in the total work time is 58.47%. The average value of the influencing factors was established: unloaded travel distance 585.26 m, loaded travel distance 490.49 m, winching distance 16.83 m, number of pieces in the load 5.95, the volume of the load 5.17 m3 and the volume of the piece in the load 1.02 m3. The half-tree length method was used. Standard time for skidding and daily skidding productivity were expressed depending on the skidding distance, while average values were used for other influencing factors. The standard time for skidding was 6.57 min/m3 at a skidding distance of 100 m, i.e. 17.60 min/m3 at a skidding distance of 1,500 m. The daily skidding productivity ranges from 73.07 m3/day at a skidding distance of 100 m to 27.28 m3/day at a skidding distance of 1,500 m. Comparison of the daily skidding productivity with the results of other researches showed that the Ecotrac 120V skidder in this particular case realizes approximately the same skidding productivity under similar working conditions.
References
AKAY, A.E., ERDAŞ, O., SESSIONS, J.(2004). Determining Productivity of Mechanized Harvesting Machines. Journal of Applied Sciences. 4(1): 100-105.
BORZ, S.A. (2015). A review of the Romanian and international practices in skidding operations. XIV World Forestry Congress. Durban, South Africa, 7-11 September 2015.
ČABARAVDIĆ, A. (2017). Biometrika u šumarstvu i hortikulturi. Sarajevo: Šumarski fakultet Univerziteta u Sarajevu.
GURDA S., JOVANOVIĆ, B., MUSIĆ, J., HALILOVIĆ, V. (2010).Tehnologije u šumarstvu, standardišumskihdrvnihsortimenataišumskabiomasa. Završniizvještajstudije. Sarajevo: FederalnoMinistarstvo poljoprivrede, vodoprivredeišumarstva.
HALILOVIĆ, V.(2012).Komparacijametodadobivanjašumskebiomasekaoobnovljivogizvoraenergije iz hrastovihsastojina. Doktorskadisertacija. Sarajevo: Univerzitet u Sarajevu, Šumarskifakultet.
HALILOVIĆ, V., GURDA, S., SOKOLOVIĆ, DŽ., MUSIĆ, J., BAJRIĆ, M. (2013). Analizautroškavremenaprisječii izradistabalahrastakitnjakaprimjenomsortimentnogmetodarada. Našešume. 30-31: 4-13.
HALILOVIĆ, V., MUSIĆ, J., GURDA, S., TOPALOVIĆ, J. (2015). Analysis of the means of forest harvesting in the Federation of Bosnia and Herzegovina. GlasnikŠumarskogfakultetaUniverziteta u Beogradu. Posebnoizdanje (2015): 55-62.
HORVAT, D., ZEČIĆ, Ž., ŠUŠNJAR, M. (2007).MorfološkeiproizvodneznačajketraktoraEcotrac 120V. Nova mehanizacijašumarstva. 28, Posebnoizdanje 1: 81-92.
IZVEDBENI PROJEKAT (2017). Odjeljenje 151 PJ „Igman”. Kantonalnojavnopreduzeće za gospodarenjedržavnimšumama „Sarajevo šume “d.o.o. Sarajevo.
JAKUPOVIĆ, DŽ. (2003). Istraživanjeoptimalnetehnologijesječe, izradeitransportadrvetaizprorednihsječa u kulturamabijelog bora. Magistarski rad. Sarajevo: Univerzitet u Sarajevu, Šumarskifakultet.
JOVANOVIĆ, B.(1980). Istraživanjautroškavremena za dvijetehnologijeradakodeksploatacijebukovihšuma u SR Bosni i Hercegovini. Magistarski rad. Zagreb: Sveučilište u Zagrebu, Šumarski Fakultet.
JOVANOVIĆ, B. (1990). Komparativnoistraživanjetehničko-tehnološkihkarakteristikatraktorapriprivlačenjudrva. Doktorskadisertacija. Zagreb: Sveučilište u Zagrebu, Šumarskifakultet.
JOVANOVIĆ, B., GURDA, S., MUSIĆ, J., BAJRIĆ, M., LOJO, A., VOJNIKOVIĆ, S. ČABARAVDIĆ, A. (2005). Šumskabiomasa - potencijalniizvorobnovljiveenergije u BosniiHercegovini. Posebnoizdanje, 19. Sarajevo: Univerzitet u Sarajevu, Šumarskifakultet.
KULUŠIĆ, B. (1990). Karakteristike šumskih terena kao indikatori izbora tehnologije privlačenja drveta. Šumarski list. 114(11-12): 463-473.
KULUŠIĆ, B., MIODRAGOVIĆ, D. (1979). Prilog istraživanju tehnološkog procesa sječe, izrade i privlačenja drveta pri iskorišćavanju borovih i hrastovih šuma u BiH. Radovi Šumarskog fakulteta i Instituta za šumarstvo u Sarajevu. 22(5-6): 3-93.
MAGAGNOTTI, N., SPINELLI, R. (EDS.)(2012). COST Action FP0902 – Good Practice Guidelines for Biomass Production Studies. Firence: CNR IVALSA.
MARČETA, D. (2015). Comparison of technologies of wood biomass utilization in beech stands. Doctoral dissertation. Ljubljana: University of Ljubljana, Biotechnical faculty.
MIHAĆ, B. (1977).Privlačenje, utovari transport drveta. RadoviŠumarskogfakultetaiInstituta za šumarstvo u Sarajevu. 21(1-2): 3-63
SABO, A., PORŠINSKY, T. (2005).Skidding of fir roundwood by Timberjack 240C from selective forests of Gorski Kotar. Croatian Journal of Forest Engineering. 26(1): 13-27.
SOKOLOVIĆ, DŽ., MUSIĆ, J.(2009). Privlačenjedrvetašumskimžičarama. Našešume. 14-15: 33-41.
ŠIPAD - IRC(1989). Tehničkenormerada u iskorišćavanjušuma. Sarajevo: ŠIPAD - IRC, OOUR SILVA.
VUSIĆ, D., ŠUŠNJAR, M., MARCHI, E., SPINA, R., ZEČIĆ, Ž., PICCHIO, R. (2013). Skidding operations in thinning and shelterwood cut of mixed stands - Work productivity, energy inputs and emissions. Ecological engineering. 61: 216-223.
ZEČIĆ, Ž. (2006). UsporedbadjelotvornostitraktoraEcotrac 120 V priprivlačenjudrva u brdskimigorskimuvjetima. Glasnik za šumskepokuse. Posebnoizdanje br. 5: 557-571.
ZEČIĆ, Ž., MARENČE, J. (2005). Mathematical models for optimization of group work in harvesting operation. Croatian Journal of Forest Engineering. 26(1): 29-37.
ZEČIĆ, Ž., PENTEK, T., VUSIĆ, D., NEVEČEREL, H., STANKIĆ, I., LEPOGLAVEC, K., BOSNER, A. (2008). Exploitation and Productivity Characteristics of the new Croatian Skidders Ecotrac 55 V and Ecotrac 120 V. In: Proceedings of „Formec” 41. International Syposium. Schmallenberg, Germany, 2-5 June 2008.
ZEČIĆ, Ž., VUSIĆ, D. (2009). Računalnenormeprivlačenjadrvatraktorima (RANOP). Zagreb: ŠumarskifakultetSveučilišta u Zagrebu.
ZEČIĆ, Ž., VUSIĆ, D., MILKOVIĆ, D., ZORIĆ, M. (2011). Skidder with single-drum or double drum winch in mountainous areas – A case study from selective forests of Croatia. In: 44th International Symposiumon Forestry Mechanisation: „Pushing the Boundaries with Research and Innovation in Forest Engineering”.Graz, Austria, 9-13 October 2011.
