원문정보
초록
영어
The efficiency of skidding stems and loading logs was investigated in Daxin forest farm, Linjiang Forest Bureau, Jilin Forest Industry Group by using a loader together with a winch and retaining plate. During skidding operations, the average of skidding distance and time are 86.15 m and 9.68 minute, respectively, the average of skidding quantity and number of stems per skidding circle is 1.12m3 and 3. The productivity of skidding is 29.62 m3 per machine team. During loading operations, the average of loading time is 2.93 minute, respectively, the average of loading quantity and number of logs per loading circle is 0.78m3 and 5.1, the productivity of loading is 52.6 m3 per machine team. The regression results show that the skidding efficiencies reduced with increasing skidding time and skidding distance. However, the relationships between skidding efficiencies and skidding quantity per skidding circle were not evident. The correlation results show that skidding efficiency is significantly different among skidding distance, skidding time, skidding quantity per skidding circle, interaction between skidding distance and time, interaction between skidding quantity and numbers of stem or log. The production rate of tracked tractor is higher than wheeled tractor no matter stem or log skidding operations.
목차
1. Introduction
2. Research Area and Operation Condition
3. Methods
3.1. Skidding Efficiency and Loading Efficiency Data Measured
3.2. Data Analysis
4. Results
4.1. Stem Skidding
4.2. Log L
5. Conclusions
Acknowledgements
References