Rock crushing device and method.

摘要

A rock crushing device which crushes a rock in the manner that an expansive member (3) which is, after being inserted into a hollow (2) formed in the rock, expanded by pressure of a liquid material injected thereinto, comprising a liquid pressure measuring device provided in a liquid supply hose and a processor connected to the liquid pressure measuring device (13) for processing the liquid pressure converted into electric signals and the time interval during which the liquid pressure is measured, wherein a valve provided in the liquid supply hose is controlled to be closed when the value of the decrease amount of the liquid pressure measured by the processor (18) exceeds a predetermined value.