The percentage rock device, being the percentage rock device which does the percentage rock by the fact that the pushing it overpowers fence punched surface at the attachment for the percentage rock device

摘要

PROBLEM TO BE SOLVED: To provide a working vehicle for rock cracking which can improve the efficiency of rock-cracking work.;SOLUTION: The working vehicle for rock cracking is provided with an attachment for a rock-cracking device on the tip of its arm, and a plurality of rock-cracking devices are attached to the attachment. Then the working vehicle for rock cracking is provided with a pressure oil feeder which supplies pressure oil used for driving each rock-cracking device. Each rock-cracking device performs rock cracking by pushing a drilling hole surface by a plurality of pressure parts in a position where it is inserted into the drilling hole, and is provided with a cylinder body and a guide conduit connected to its base end side. Then the rock-cracking device of the working vehicle for rock cracking is used for inserting a plurality of pressure parts into the drilling hole to the point of the first rock-cracking depth and for performing rock-cracking at the depth. Then rock-cracking is performed at the second rock-cracking depth which is deeper than the first rock-cracking depth. Furthermore, rock-cracking by the rock-cracking method is performed at the third rock-cracking depth which is deeper than the second rock-cracking depth.;COPYRIGHT: (C)2008,JPO&INPIT