| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to test a collective body of bore holes, an apparatus for injecting water into such a bore hole collective and blocking of the cracks. SOLUTION: In a group of the bore holes drilled in a rock M which cracks F pierce through and extend across, a main bore hole (1) which is a water injecting bore hole for water to be injected into and interconnects the cracks and a surrounding bore hole (2) which is at least one surrounding bore hole for collecting water connected to the main bore hole via at least one crack F so as to take in the water injected into the main bore hole and reached the surrounding bore hole through the crack F are included. COPYRIGHT: (C)2005,JPO&NCIPI
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