METHOD AND APPARATUS FOR PENETRATION OF CRACK-DETECTING CHEMICAL INTO ROCK

摘要

PROBLEM TO BE SOLVED: To surely detect a fine crack in a sample by pressing a crack-detecting chemical into the sample of rock. SOLUTION: A crack-detecting chemical in a crack-detecting drug tank 10 is continuously sent with a pressure to a lower part of a rock sample S through a crack-detecting chemical storage cylinder 22. The pressure at this time is approximately 1 kg/cm2. The crack-detecting chemical 11 supplied to the lower part of the rock sample S penetrates a crack of the rock sample S, replaces the air in the rock sample S thereby discharging the air out of a piping 31. In this case, since the pressured crack-detecting chemical 11 is supplied from the lower part of the rock sample S, the crack in the rock sample S is expanded to facilitate the penetration of the crack-detecting chemical 11 to the crack. The air extruded from the crack is smoothly guided upward becomes it is lighter than the crack-detecting chemical 11.