@techreport{oai:soar-ir.repo.nii.ac.jp:00017046,
 author = {星加,  安之 and 小山,  裕 and 奥山,  周作 and 村山,  忍三},
 month = {Mar},
 note = {:The prospecting tunnel was shape of ab oiled fish paste (height，ab out 5m，bottom width，a bout 5.6m). The gas sampling was carried in working face (29.30C，humidity，75% ). The point was distance of about 700m from the tunnel entrace，h owever，o dor of hydrogen sulfide and sulfur dioxide was not detected. The concentrations of carbon dioxide increased by blasting (set ad ynamite)，f rom 0.1 to 0.5% in shunting car for retrograde shock，t hat of methane was 4t o 16ppm，w her包as，maximum concentrations of benzeneand toluene were 65 and 150 ppb，re spectively, Article, 信州大学環境科学論集8:25-29(1986)},
 title = {掘削中の某トンネル調査坑入坑経験について},
 year = {1986}
}