ロータリーカッタによる岩石破砕に関する研究 (第2報)
球形カッタおよび歯車形カッタによる岩石破砕について
1969 年 85 巻 975 号 p. 491-496
詳細
1969 年 85 巻 975 号 p. 491-496
A fundamental experiment on fracturing rocks by spherical chip cutter and amilled tooth cutter in relation to tunnel boring machine applicability was carried out, and following results wereobtained.
(1) The depth and the with of fractured groove increase with the pitch of the milled tooth cutter, while this result couldn't be apparently obtained from spherical chip cutter since the range of the pitch wasn't wide enough.
(2) The fractured volume decreases with the pitch.
(3) A larger traction force is required when the pitch is large and in this case the difference between the maximum value of traction force and the minimum one is also large.
(4) The relation of the depth to the width depends not on the pitch but the rock'sproperty.
(5) The moment which is yielded by friction between the cutter and its rotating axis has large influence on the friction force.
