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초록

Stability of cable yarding with self-propelled cariage was discussed by theoretical tension calculationand field test. To verify usefulness of theoretical stability evaluation of cable yarding operation, skyline tensionand stump anchoring force were measured and compared with theoretical calculation. As results, we know thatmeasured skyline tension was similar to theoretical calculated tension. From these results, overal stability ofcable logging operation could be evaluate. The stump anchoring force correlated closely with the stumpdiameters. The inclination angles that the stumps show the maximum anchoring force were ranged 5-10 degrees.It was conclude that the stumps have lost the function as an anchor when the inclinations was so large that theycould be observed.

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