【摘要】 <正>天山人工冰洞开掘在乌鲁木齐河源1号冰川西支末端(图1)。洞口高程3820米。有关冰洞开挖及最初的观测结果已作过简短报道。1982年冬季再次将冰洞整修后着重进行了冰体流变的现场观测与冰的蠕变试验。更多还原

【Abstract】 In order to investigate the inner flow characteristics of continental type glacier, an artificial tunnel was dug.14 observation marks were fixed on a vertical line in the side-wall of section D inside the ice tunnel. This section was in a vertical shaft 7 m high. Measuring the glacier thickness and observing the horizontal displacement of the observation marks, 3 times in 1983, we could estimated the stress and strain in this section, and then got the flow law parameters n=2.22 and A = 6.45×10-3 s-1 (kPa)-n.Uniaxial compression tests under the stress condition from 71 to 408 kPa and the temperature condition from -18 to -1℃ were carried out more than 147 hours. Samples were taken from the ice tunnel. It was considered that the secondary creep period was attained at last,then the flow law parameters of n=1.63 and A= 1.43×10-12s-1 (kPa)-n were obtained.Ice tunnel was surrounded by warm ice with a temperature not lower than 2.3℃ in the section, 27 rn from the entry. The water sprung up from the bottom had been seen. It was possible that a basal sliding with a velocity of 2 -4 m/ year was taking place.更多还原