Abstract
The measurements in the G-Tunnel heated block showed: The thermal-expansion coefficient for constant stress temperature increases had a range of 5.0 to 8.7 x 10{sup -6} {sup 0}C{sup -1}, and values compared well with a laboratory range of 6.4 to 8.0 x 10{sup -6} {sup 0}C{sup -1}. Single-fracture permeabilities were relatively insensitive to stress and slightly sensitive to temperature increases under representative in situ conditions. Excavation effects showed the most influences. The measurements ranged from 49 to 956 x 10{sup -8} cm{sup 2}. Moisture contents varied from 55 to 70% saturation before heating to 15% after heating as measured with a neutron probe. There was a pronounced temperature dependence above 90{sup 0}C.
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