[VII-164] In site test of backfilling material by spraying method of small cross section tunnel in the Mizunami Underground Research Laboratory (1) Preliminary tests on the ground
Keywords:Backfilling, Spraying method, Cycle time, Sand-bentonite mixture, Effective clay dry density
As part of the development of geological disposal and backfilling technology options for crystalline rock in Japan, we examined the feasibility of full-section spraying method, in the Mizunami Underground Research Laboratory. The main contents of this report are as follows;
・Materials and machines effect on workability and quality
・Material and machines selection based on test results
・Materials and machines effect on workability and quality
・Material and machines selection based on test results
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