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TESTING STUDY ON VARIATIONAL CHARACTERISTICS OF
ROCKMASS PERMEABILITY UNDER LOADING-UNLOADING
OF CONFINING PRESSURE |
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Abstract Based on permeability test，the varitional characteristics of rockmass permeability under loading- unloading of confining pressure are studied. The test results show that both the permeability of sandstone and that of granite with a single fracture declines with the increasing effective pressure，following the law of exponential decay. The permeability sensitivity of granite with a single fracture to effective stress is much stronger than that of sandstone，but the recovery capability of permeability of sandstone is more stronger than that of granite with a single fracture. Moreover，for sandstone and granite with a single fracture，there is obvious hysteresis effect for the restitution of permeability in the process of unloading of confining pressure.
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Received: 17 December 2002
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LI Man1, 2, LUO Zhixiong1, GUO Dianbin3, HU Dawei2, 4*, YANG Fujian2, 4, ZHOU Hui2. Effect of CO2 injection rate and roughness on fracture activation mechanism[J]. , 2026, 45(4): 1065-1078. |
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